Source: https://patents.google.com/patent/JP2000210315A/en
Timestamp: 2019-06-24 16:51:21
Document Index: 502142441

Matched Legal Cases: ['art 9', 'arts 10', 'art 12', 'arts 13', 'art 55', 'art 9']

JP2000210315A - Artificial intervertebral disk and auxiliary instrument for transplantation thereof - Google Patents
Artificial intervertebral disk and auxiliary instrument for transplantation thereof
JP2000210315A
JP2000210315A JP11015843A JP1584399A JP2000210315A JP 2000210315 A JP2000210315 A JP 2000210315A JP 11015843 A JP11015843 A JP 11015843A JP 1584399 A JP1584399 A JP 1584399A JP 2000210315 A JP2000210315 A JP 2000210315A
JP11015843A
哲弘 井口
1999-01-25 Application filed by Kobe Steel Ltd, 株式会社神戸製鋼所 filed Critical Kobe Steel Ltd
1999-01-25 Priority to JP11015843A priority Critical patent/JP2000210315A/en
2000-08-02 Publication of JP2000210315A publication Critical patent/JP2000210315A/en
PROBLEM TO BE SOLVED: To provide an artificial intervertebral disk and an auxiliary instrument with which a fixing capability is improved and the fixing capability after bone fusion can be reinforced by increasing a charge transplant bone quantity. SOLUTION: This artificial intervertebral disk is constituted by providing a supporting member 4 equipped with a bottom part 9 and both front and rear side parts 10 and 11 while forming the surface of the bottom part into flat surface which comes in contact with the main body of a vertebra and a movable member 5 equipped with a top part 12 and both front and rear side parts 13 and 14 while forming the surface of the top part into flat surface parallel to the surface of the bottom part which comes in contact with the main body of the vertebra and assembled by inscribing or circumscribing both the front and rear side parts to the holding member through inner or outer fitting to both the front and rear side parts of the holding member. Then, respective contact surface parts in both the front and rear side parts of the holding member and in both the front and rear side parts of the movable member are formed into mutually engaging teeth 15 and 16 and these teeth are composed of ratchet teeth capable of a ratchet action in the case of motion in a separating direction between the holding member and the movable member or capable a holdfast action in the case of motion in an approaching direction.
【発明の属する技術分野】本発明は、特に腰部の隣り合う椎骨本体間に人体後方側から介挿して使用するための人工椎間板及びその移植用の補助器具であるホルダー、 The present invention relates to is an artificial intervertebral disc and aids for the implant to be used in particular interposed from the body rear side between the vertebral bodies adjacent the waist holder,
間隔調整治具に関する。 About interval adjusting jig.
【従来の技術】老齢者の椎間板、殊に腰部椎間板は加齢と共に変性し、薄くなっている。 BACKGROUND ART elderly disc, in particular lumbar disc degenerates with age, is thinner. 本発明が対象としている人工椎間板は、その変性した椎間板の高さを元の正常な状態に復元し、後方からの脊椎固定デバイスと共に腰椎を固定する働きを持つものである。 Artificial disc of the present invention is targeted are those having a function of its height degenerated disc was restored to its original normal state, securing the lumbar with spinal fixation device from the rear. 若し、この種の人工椎間板が無ければ後方からの脊椎デバイスのみの固定では強度的に不十分であり例えば沈み込みが起こり患者に痛み等の不快な症状が出ることが従来から知られている。 Wakashi, the discomfort of pain such as the spinal fixation devices only occur sinking is for example a strength insufficient patient from behind Without this type of artificial disc leaves has been known .
【０００３】人工椎間板は、患者自身の椎間板に置き換えるスペーサとして用いられるものである。 [0003] artificial disc is used as a spacer to replace the patient's own disc. そのため、 for that reason,
それぞれの患者に適応した椎間板形状が人工椎間板に求められる。 Disc shape adapted to each patient is determined for the artificial disc. また、椎骨本体の手術方法は後方からの背中側から行うので、脊髄を接触しないように避けながら患部に人工椎間板等を設置する必要があり、したがって慎重な取扱いが要求される。 Further, surgical method of vertebral body is performed from the back side from the rear, it is necessary to install an artificial disc or the like to the affected area while avoiding so as not to contact the spinal cord, thus careful handling is required.
【０００４】この種の人工椎間板に関する先行技術としては、形状変化し得ないブロック状の固定形人工椎間板と形状変化可能な可変形人工椎間板とがある。 [0004] As the prior art relating to this kind of artificial disc, there is a block-shaped fixing type artificial discs and shape-changeable deformable prosthetic disc which can not change in shape. 固定形人工椎間板では、患部に設置しても「ガタ付き」があれば少し高めの別の固定形人工椎間板を再度設置し直さねばならなく、又は、少し高めのものを「やすり」等で研磨する必要があったりして、手術に時間と手間がかかる問題がある。 In the fixed-shaped artificial disc, be provided to the affected area but must be re-installed another fixed-shaped artificial disc slightly higher if there is a "backlash" again, or, polish things a little higher in the "sand", etc. with or there is a need to, there is a such a problem time and effort to surgery.
【０００５】そこで、患部に挿入された人工椎間板が外部からの調整操作によって患者の椎間板形状（特に高さ）に適合させることができる可変形が求められていた。 [0005] Therefore, the variable-shaped prosthetic disc inserted into the affected part can be adapted to the patient's intervertebral disc shape (especially height) by adjustment operation from the outside has been required. この可変形人工椎間板の典型的なものとしては、特開平 7−213533号公報によって開示された先行技術が挙げられる。 The variable as a modification that an artificial disc typical of the prior art disclosed by JP-A 7-213533 discloses the like. これは、図１０に概要示されるように椎骨本体との接触のためのほぼ平行な２つの分岐体５３、５３ This is approximately two parallel branches member for contact with a vertebral body as shown outlined in Figure 10 53
と、両分岐の後端部を連結するブリッジ５４と、２つの椎骨本体にこれを挿入した後に２つの分岐体５３、５３ When, a bridge 54 connecting the rear ends of both branches, the two after inserting it into two vertebral bodies branch body 53
を角度的に離隔させるための部品５５とから構成されていて、２つの椎骨本体の間の脊柱前弯角の術中調節を可能にするものである。 The be composed of components 55. for angularly spaced, those that permit the intraoperative adjustment of spinal lordotic between two vertebral bodies.
【発明が解決しようとする課題】上記可変形人工椎間板は、上述するように前弯角度の調整は可能であるが、高さ（板厚み）全体の調整ができないため、患部に設置し角度調節した場合、両椎骨本体が作用する荷重は２つの分岐体５３、５３の前端部で主に受けることになるため、不均等荷重分布となって安定性が欠ける問題がある。 [0006] The deformable prosthetic discs, although it is possible adjust the lordotic degree to above, the height (plate thickness) can not be the whole of the adjustment, installed in the affected area angle adjustment If you load both vertebral body acts to become a main subject that at the front end of the two branches member 53, there is a problem that stability becomes uneven load distribution is lacking. また、人工椎間板の場合は、椎骨本体等との融合（馴染み）を良くするために板内部に移植骨を充填することが行われるが、２つの分岐体５３、５３の間に部品５５が介在する複雑な構造であるために、充填移植骨量が少量とならざるを得ない不利もある。 In the case of an artificial intervertebral disc, it is performed to fill the bone graft within the plate in order to improve the fusion of the vertebral body, etc. (familiar), part 55 between the two branches member 53 is interposed for a complex structure, there are also disadvantages to fill transplanted bone mass inevitably a small amount.
【０００７】本発明は、このような問題点の解消を図るために成されたものであり、従って、本発明の目的は、 [0007] The present invention has been made in order to solve such a problem, therefore, an object of the present invention,
患者に適した椎間高さの調整を容易に行えるようにすることにより、椎間荷重分布の均一化を図って固定性を向上し、併せて充填移植骨量を増やして骨融合後の固定性の強化を果たらせ得る新規な人工椎間板を提供することにあり、また、本発明に係る人工椎間板を移植する際に好適に用いられる改良された補助器具を提供することにある。 By that allows easy adjustment of the intervertebral height appropriate for the patient, the aim of equalizing the intervertebral load distribution improves fixation, together increase the filling transplant bone mass and fixed after osseointegrable There strengthening sexual to provide a novel artificial disc that can cod result, also to provide a suitably improved aid used in implanting an artificial disc according to the present invention.
【課題を解決するための手段】本発明は、上記の目的を達成するため以下に述べる構成としたものである。 The present invention SUMMARY OF THE INVENTION are those where the structure described below to achieve the above object. 即ち、本発明に係る請求項１の発明は、底部９及び該底部９の前後両側縁から立ち上げた前後両側部１０，１１を備え、底部９表面が椎骨本体に接触する平らな面に形成される受け部材４、頂部１２及び該頂部１２の前後両側縁から立ち下げた前後両側部１３，１４を備え、頂部１ That is, the invention of claim 1 according to the present invention comprises a bottom 9 and the front and rear side portions 10 and 11 launched from the front and rear side edges of the bottom section 9, formed on a flat surface in which the bottom 9 surface in contact with the vertebral body receiving member 4 is provided with front and rear side portions 13 and 14 which falls from the front and rear side edges of the top 12 and the apex portion 12, the top 1
２表面が前記底部９の表面に平行なかつ椎骨本体に接する平らな面に形成されて、受け部材４に対し前後両側部１３，１４が受け部材４の前後両側部１０，１１に内接する内嵌合又は外接する外嵌合によって組付けられる可動部材５を含み、受け部材４の前後両側部１０，１１及び可動部材５の前後両側部１３，１４における各接触面部が互いに噛み合う歯形１５，１６に形成されて、この歯形１５，１６が受け部材４と可動部材５の間での離隔する方向の動きには追い歯可能、接近する方向の動きには歯止め可能としたラチェット歯形からなることを特徴とする人工椎間板である。 Fitting inner two surfaces inscribed in both front and rear sides 10, 11 of the bottom 9 surface is formed on a flat surface in contact with the parallel and vertebral body of receiving receives both side portions 13 and 14 back and forth relative to member 4 members 4 It includes a movable member 5 to be assembled by the outer fitting for engagement or circumscribed, receiving the teeth 15, 16 each contact surface portion are engaged with each other in the front and rear side portions 13 and 14 of the front and rear sides 10, 11 and the movable member 5 of the member 4 is formed, characterized in that it consists of a ratchet tooth profile which enables the pawl to separation directions of the motion follow possible teeth, approaching movement between the tooth 15 and 16 receiving member 4 and the movable member 5 is an artificial intervertebral disc to be.
【０００９】また、本発明に係る請求項２の発明は、上記請求項１記載の人工椎間板に関して、受け部材４の底部９及び可動部材５の頂部１２に移植骨補填用の穴３１ [0009] The invention of claim 2 according to the present invention, the holes 31 of the above claims, with respect to the artificial disc of claim 1, wherein, receiving a bone graft filling the top 12 of the bottom 9 and the movable member 5 of the member 4
が開設されてなる構成としたことを特徴とする。 Characterized in that but was formed by opened configuration.
【００１０】また、本発明に係る請求項３の発明は、上記請求項１又は請求項２に記載の人工椎間板に関して、 Further, the invention of claim 3 according to the present invention, with respect to the artificial intervertebral disc according to the claim 1 or claim 2,
受け部材４の前後両側部１０，１１及び可動部材５の前後両側部１３，１４に移植骨補填用の穴３２，３３が開設されてなり、外側の前後両側部における穴は丸穴であり、内側の前後両側部における穴は前記丸穴に連通する縦長穴である構成としたことを特徴とする。 The holes 32 and 33 for bone graft filling the front and rear side portions 13 and 14 of the receiving front and rear side portions 10 and 11 and the movable member 5 of the member 4 is opened becomes, the holes in the front and rear side portions of the outer are round holes, the holes in the front and rear sides of the inner is characterized in that a configuration is a vertically long hole communicating with the circular hole.
【００１１】また、本発明に係る請求項４の発明は、上記請求項１、請求項２又は請求項３に記載の人工椎間板に関して、受け部材４の前後両側部１０，１１と可動部材５の前後両側部１３，１４の何れかにおける左右側端部の一方に移植用補助器具であるホルダー２の先端部を係止させる細長小穴等の係止手段３４が設けられる構成としたことを特徴とする。 Further, the invention of claim 4 according to the present invention, the first aspect, with respect to the artificial intervertebral disc of claim 2 or claim 3, receiving member 4 on both sides 10 and 11 and the movable member 5 back and forth and characterized in that a configuration in which the locking means 34 of equal elongate eyelet for locking the tip of the holder 2 is a transplantation aid to one of the left and right side end portions of one of the front and rear side portions 13 and 14 are provided to.
【００１２】また、本発明に係る請求項５の発明は、底部１７及び該底部１７の前後両側縁から立ち上げた前後両側部１８，１９を備え、底部１７表面が椎骨本体に接触する平らな面に形成され、底部１７内面に長手方向の左右両端部から内方部に向け上り勾配となる一対のテーパー内底面２３，２４が設けられる受け部材４、角台形を成し、外周面における下面が前記一対のテーパー内底面２３，２４に摺接させるテーパー下面２５，２６に、 [0012] The invention of claim 5 according to the present invention is provided with a front and rear side portions 18 and 19 launched from the front and rear side edges of the bottom 17 and the bottom portion 17, flat bottom portion 17 the surface is in contact with the vertebral body formed on the surface, receiving member 4 in which a pair of tapered inner bottom surface 23, 24 as the upward gradient toward the longitudinal direction of the left and right end portions in the inner portion to the bottom portion 17 the inner surface is provided, angled trapezoid, the lower surface of the outer peripheral surface a tapered bottom surface 25 but for sliding contact with the pair of tapered inner bottom surface 23 and 24,
上面が該テーパー下面２５，２６と対称関係をなすテーパー面に歯形を有するテーパー歯形２７，２８に、前面及び後面が受け部材４の前後両側部１８，１９に内摺接させる平坦面にそれぞれ形成されて、受け部材４内の一対のテーパー内底面２３，２４上に同軸配置に収設される一対の間隔調整駒部材６，７、一対の間隔調整駒部材６，７の一方７に遊嵌挿し他方６に螺挿して受け部材４ A tapered tooth 27, 28 whose upper surface has a tooth profile in a tapered surface forming the tapered lower surface 25 and symmetrical relationship, respectively formed on the flat surface which Uchisuri contact with the front and rear side portions 18 and 19 of the member 4 receiving the front and rear surfaces It has been subjected pair of distance adjusting bridge member 6 which is Osamu設 coaxially arranged on a pair of tapered inner bottom surface 23, 24 of the member 4, loosely fitted in one 7 of the pair of gap adjusting bridge member 6 member 4 received in screwed to insert the other 6
内にその長手方向に延ばして収設され、正逆回転の操作によって一対の間隔調整駒部材６，７を受け部材４の中央部に同期的に接近離間可能とした間隔調整ボルト８、 Its longitudinal direction extended is Osamu設 within the interval adjusting bolt 8 which was synchronously accessible spaced in central member 4 receives a pair of gap adjustment bridge member 6, 7 by the operation of the forward and reverse rotation,
頂部２０及び該頂部２０の前後両側縁から立ち下げた前後両側部２１，２２を備え、頂部２０表面が前記底部１ Includes a front and rear side portions 21 and 22 falls from the front and rear side edges of the top 20 and the apex portion 20, the can top 20 surface bottom 1
７の表面に平行なかつ椎骨本体に接する平らな面に形成され、前後両側部２１，２２の左右両端縁部が受け部材４の一対のテーパー内底面２３，２４に対応した中央部に向け下り勾配をなすテーパー歯形２９，３０に形成されて、受け部材４内に両テーパー歯形２９，３０を一対の間隔調整駒部材６，７の両テーパー歯形２７，２８に噛み合わせ、かつ、前後両側部２１，２２を受け部材４ And parallel to the 7 surface formed on a flat surface in contact with the vertebral bodies, gradient down toward the central portion corresponding to a pair of tapered inner bottom surface 23, 24 of the right and left end edges receiving member 4 of the front and rear side portions 21 and 22 is formed in a tapered tooth 29, 30 form a meshing receiving both tapered teeth 29, 30 in the member 4 on both tapered teeth 27, 28 of the pair of gap adjusting bridge member 6, and front and rear side portions 21 , member 4 receives the 22
の前後両側部１８，１９に内摺接させて、前記長手方向に直交する間隔調整方向の移動可能に収設される可動部材５を含み、互いに噛み合う前記可動部材５のテーパー歯形２９，３０と間隔調整駒部材６，７のテーパー歯形２７，２８とが、受け部材４と可動部材５との間での離隔する方向の動きには追い歯可能、接近する方向の動きには歯止め可能としたラチェット歯形からなることを特徴とする人工椎間板である。 Front and rear side portions 18 and 19 by Uchisuri contact includes a movable member 5 that is movably Osamu設 spacing adjustment direction perpendicular to the longitudinal direction, the tapered teeth 29, 30 of the movable member 5 meshing with each other of the tapered teeth 27, 28 of the distance adjusting bridge member 6, 7, the receiving member 4 and movable member 5 and the separation directions of the motion follow possible teeth between, and allows the pawl in the direction of movement of approaching is an artificial intervertebral disc which is characterized in that it consists of a ratchet tooth.
【００１３】また、本発明に係る請求項６の発明は、上記請求項５記載の人工椎間板に関して、受け部材４の底部１７及び可動部材５の頂部２０に移植骨補填用の穴３ [0013] The invention of claim 6 according to the present invention, the claim 5 for wherein the artificial disc, receiving base 17 and the hole 3 for bone graft filling the top portion 20 of the movable member 5 of the member 4
５が開設されてなる構成としたことを特徴とする。 5, characterized in that has a structure comprising opened.
【００１４】また、本発明に係る請求項７の発明は、上記請求項５又は請求項６に記載の人工椎間板に関して、 [0014] The invention of claim 7 according to the present invention, with respect to the artificial intervertebral disc according to the claim 5 or claim 6,
受け部材４の前後両側部における左右側端部の一方に移植用補助器具であるホルダー２の先端部を係止させるあり溝等の係止手段３６が設けられる構成としたことを特徴とする。 Receiving, characterized in that the left and right side there locking the distal portion of the holder 2 is a transplantation aid at one end a groove or the like of the engaging means 36 has a configuration provided in the front and rear side portions of the member 4.
【００１５】また、本発明に係る請求項８の発明は、上記請求項５、請求項６又は請求項７に記載の人工椎間板に関して、間隔調整ボルト８が頭部３７を備え、該頭部３７に移植用補助器具である間隔調整治具３を用いて回動操作するための係止部３８が設けられている構成であることを特徴とする。 [0015] The invention of claim 8 according to the present invention, the claim 5, with respect to the artificial intervertebral disc of claim 6 or claim 7, gap adjusting bolt 8 comprises a head 37, head portion 37 characterized in that using the distance adjusting jig 3 is a transplantation aid is configured to engaging portion 38 for rotating operation is provided.
【００１６】また、本発明に係る請求項９の発明は、上記請求項１乃至請求項８のいずれかに記載の人工椎間板に関して、受け部材４の底部表面及び可動部材５の頂部表面が、多数の微細な凹凸を有する粗化面３９に形成される構成としたことを特徴とする。 [0016] The invention of claim 9 of the present invention, with respect to the artificial intervertebral disc according to any one of claims 1 to 8, a bottom surface and a top surface of the movable member 5 of the receiving member 4, a number wherein the structure is formed on the roughened surface 39 having fine irregularities and the.
【００１７】また、本発明に係る請求項１０の発明は、 [0017] The invention of claim 10 according to the present invention,
上記請求項４又は７に記載の人工椎間板１を支持して隣り合う椎骨本体間に案内するためのホルダー２であり、 A holder 2 for guiding between the vertebral bodies adjacent supporting an artificial intervertebral disc 1 according to the claim 4 or 7,
両端部が開口する中空導管４０と、該中空導管４０の先端部に設けられ人工椎間板１の前記係止手段に係脱可能に形成された係止部４１と、前記中空導管４０の後部に設けられた把持部４２とを含んで構成されることを特徴とする。 A hollow conduit 40 having both ends opened, and the locking means the locking portion 41 that is detachably formed on the hollow provided at the distal end portion of the conduit 40 artificial disc 1, provided at the rear of the hollow conduit 40 characterized in that it is configured to include a grip portion 42 that is.
【００１８】また、本発明に係る請求項１１の発明は、 [0018] The invention of claim 11 according to the present invention,
上記請求項１０記載のホルダー２に関して、係止部４１ Regard holder 2 of the claim 10, the locking portion 41
が、中空導管４０を把持部４２でその軸周りに約９０° But about 90 ° about its axis a hollow conduit 40 with gripper 42
正逆回動操作することにより、前記係止手段に係脱可能な「ありほぞ」に形成される構成としたことを特徴とする。 By normal and reverse rotation operations, characterized by being configured to be formed into a disengageably "dovetail" with the locking means.
【００１９】また、本発明に係る請求項１２の発明は、 [0019] The invention of claim 12 according to the present invention,
請求項４に記載の人工椎間板の間隔調整を行うための間隔調整治具３であり、請求項１０記載のホルダー２における中空導管４０内に貫挿通し得る径及び長さの鞘管４ Billing the spacing adjusting jig 3 for performing gap adjustment of the artificial intervertebral disc according to claim 4, claim 10 diameter may transmural inserted into the hollow conduit 40 in the holder 2 according and length sheath pipe 4
３と、略平行の対向位置が弾性保持されて鞘管４３の先端部に突設されてなる一対の間隔調整片４４，４５と、 And 3, a pair of spacing adjusting pieces 44, 45 substantially parallel opposing positions, which are projected is elastically held at the distal end of the sheath tube 43,
鞘管４３内に貫挿通し得る棒体の先端部に球状の摺動子４７が設けられ、後部に操作部４８が設けられてなる間隔調整ロッド４６とを含み、鞘管４３内に貫挿通した間隔調整ロッド４６を操作部４８で抽送操作することにより、一対の間隔調整片４４，４５間に介挿された摺動子４７を前後方向に移動して前記一対の間隔調整片４４， Spherical slider 47 is provided at the distal end portion of the rod that may transmural inserted into the sheath pipe 43, and a gap adjusting rod 46 formed by the operation unit 48 is provided at a rear portion, transmural inserted into the sheath tube 43 interval adjusting rod 46 by 抽送 operating the operation unit 48, the pair of distance adjusting piece 44 to move the slider 47 interposed between the pair of interval adjusting pieces 44, 45 in the longitudinal direction and,
４５を開閉動可能としてなる構成としたことを特徴とする。 Characterized in that a configuration consisting of 45 as a possible opening-and-closing.
【００２０】なお、本明細書において、本発明の構成に係る各要素部材に関して底部、頂部、前後側及び左右側の字句を用いているが、これは図面との関係で理解を助ける意で便宜上表現したものであって、使用態様によっては底部、頂部が逆に頂部、底部となり、また、前後側及び左右側も同様に逆になることがあってそれぞれ読み替え可能であるのは当然であり、従って、底部、頂部、 [0020] In this specification, the bottom with respect to each element member according to the configuration of the present invention, the top, but with lexical front and rear and right and left side, this is for convenience in mind to aid in understanding the relationship between drawings a a representation of the bottom by using embodiments, the top apex to the contrary, becomes the bottom, also to be replaced, respectively when there is also the front and rear and left and right side are reversed similarly is of course, Accordingly, bottom, top,
前後側及び左右側の趣旨が狭義に限定して解釈されるものでないことは言うまでもない。 It goes without saying that the spirit of the front and rear and left and right side is construed as being limited to the narrow sense.
【発明の実施の形態】以下、本発明の好ましい実施形態を、添付図面を参照しながら具体的に説明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the preferred embodiments of the present invention will be described with reference to the accompanying drawings.
【００２２】図１には、本発明の第１の実施の形態に係る人工椎間板１の態様が拡大示され、（イ）は平面図、 [0022] Figure 1 embodiment of the artificial intervertebral disc 1 according to the first embodiment of the present invention is shown enlarged, (b) is a plan view,
（ロ）は高さ最高時の正面図、（ハ）は高さ最高時の縦断面図、（ニ）は高さ最低時の縦断面図である。 (B) is a front view when the height up, (c) is a longitudinal sectional view when the height up, (d) is a longitudinal sectional view at the height minimum.
【００２３】図１に示される人工椎間板１は、受け部材４と可動部材５との両部材を含んで構成される。 The artificial disc 1 shown in FIG. 1 receives configured to include both members of the member 4 and the movable member 5. この各部材は、人体の骨質環境に適応した材質、例えばチタン合金により所定の形状に形成されており、受け部材４ Each member is formed into a predetermined shape material adapted to human bone environment, for example of titanium alloy, receiving members 4
は、底部９及び該底部９の前後両側縁から立ち上げた前後両側部１０，１１を備えて、上面部及び左右両側端面部が開口した四角形トラフ状を成しており、底部９表面が椎骨本体に面接触する平らな面になっている。 Is provided with a bottom 9 and the front and rear side portions 10 and 11 launched from the front and rear side edges of the bottom portion 9, it has a square shape trough of the upper surface portion and the right and left side end surface portion is opened, the bottom 9 surface vertebrae It has been on a flat surface to surface contact with the body. 可動部材５は、頂部１２及び該頂部１２の前後両側縁から立ち下げた前後両側部１３，１４を備えて、下面部及び左右両側端面部が開口した四角形トラフ状を成しており、受け部材４に対し前後両側部１３，１４が前後両側部１ Movable member 5 is provided with a front and rear side portions 13 and 14 which falls from the front and rear side edges of the top 12 and the apex portion 12 has a quadrangular shape trough of the lower surface portion and the right and left side end surface portion is opened, the receiving member front and rear side portions 13 and 14 back and forth relative to 4 sides 1
０，１１の内面に接触して内嵌合できるように形成され、頂部１２表面が底部９の表面に平行なかつ椎骨本体に面接触する平らな面になっている。 In contact with the inner surface of 0,11 it is formed to allow the inner fitting and has become a flat surface to surface contact with the parallel and vertebral body on the surface of the top 12 surface bottom 9.
【００２４】このような上記人工椎間板１は、受け部材４と可動部材５との嵌合度合いを調整することによって高さ（椎間の）を変えることができ、図１（ハ）に示される最高状態と、図１（ニ）に示される最最低態との間で所望の椎間高さを設定できるようになっている。 [0024] Such the artificial disc 1 can vary receiving height by adjusting the fitting degree between member 4 and the movable member 5 (intervertebral), shown in FIG. 1 (c) and the highest state, it is possible to set a desired intervertebral height between the highest minimum state shown in FIG. 1 (d). しかして、受け部材４の前側部１０及び後側部１１と可動部材５の前側部１３及び後側部１４とにおける各接触面部は、互いに噛み合う歯形１５と歯形１６とに形成され、 Thus, the contact face portion in the front side 13 and back side 14. of the front portion 10 and back side 11 of the receiving member 4 and the movable member 5 is formed in the tooth 15 and tooth 16 meshing with each other,
しかも、この歯形１５と歯形１６が、受け部材４と可動部材５の間での離隔する方向の動きには追い歯可能、接近する方向の動きには歯止め可能としたラチェット歯形となっていることが特徴点である。 Moreover, that the tooth 15 and the tooth 16, the receiving member 4 and the movable member between 5 to follow possible teeth spaced to the direction of movement, in the direction of movement approaching and has a pawl possible and the ratchet teeth There is a point feature. すなわち、図１ That is, FIG. 1
（ハ）、（ニ）を参照して、歯形１５の各歯については、歯すじが底部９の表面に平行に、一方の歯面が底部９に鋭角で交差し得るテーパ面に、他方の歯面が底部９ (C), with reference to (d), for each tooth of the teeth 15, parallel to the surface of the bottom 9 tooth trace, the tapered surface in which one of the tooth surface may intersect at an acute angle to the bottom 9, the other bottom 9 tooth surface
の表面に平行になった断面直角三角形の歯になっており、歯形１６の各歯については、歯すじが頂部１２の表面に平行に、一方の歯面が頂部１２に鋭角で交差し得るテーパ面に、他方の歯面が頂部１２の表面に平行になった断面直角三角形の歯になっている。 It has become a cross tooth of a right triangle that is parallel to the surface of, for each tooth of the teeth 16, parallel to the surface of the top portion 12 is a tooth trace, taper one tooth surface may intersect at an acute angle to the top 12 the face, the other tooth surface is in tooth cross-section a right-angled triangle which is parallel to the surface of the top portion 12.
【００２５】このような歯形１５、歯形１６に形成することにより、底部９と頂部１２の間隔を拡げる方向には追い歯となって動かすことができるが、反対に間隔を狭める方向には歯止めされて動かすことができなく、従って、一旦、椎間高さを設定すると、この高さを狭める方向の外力が加えられたとしても十分に対抗して該高さを保持し得るようになっている。 [0025] Such tooth 15, by forming the tooth 16, can be moved a follow teeth in a direction to expand the distance between the bottom 9 and the top 12 are pawl in a direction to narrow the gap in the opposite can not be moved Te, therefore, once the set of intervertebral height, and is able to hold the height-also against enough as an external force in a direction to narrow the height was added . なお、間隔を拡げる方向への調整は、専用の間隔調整治具３を使用して簡単に行えるが、この調整作用については後述する。 Incidentally, the adjustment in the direction to spread apart, but allows an easy to use spacing adjustment jig 3 only will be described later this adjustment action.
【００２６】図１に示される人工椎間板１は、受け部材４の底部９及び可動部材５の頂部１２に移植骨補填用の穴３１、例えば１０個の小径の丸穴が分散して開設されていて、この底部９及び頂部１２の各表面が多数の微細な凹凸を有する粗化面３９に形成されている。 The artificial disc 1 shown in FIG. 1, bottom receiving portion 9 and the holes 31 for the bone graft filling the top 12 of the movable member 5 of the member 4, for example, have 10 of round holes of a small diameter is opened in a distributed Te, the surface of the bottom portion 9 and top 12 are formed on the roughened surface 39 having a large number of fine irregularities. なお、この粗化面３９は、機械的な凹凸加工手段或いはＨＡ，Ａ Incidentally, the roughened surface 39 is mechanically patterned indentation means or HA, A
Ｗ等のプラズマコーティング加工手段によって容易に形成することが可能である。 Can be easily formed by a plasma coating process means such as W.
【００２７】上記人工椎間板１は、更に、受け部材４の前後両側部１０，１１及び可動部材５の前後両側部１ [0027] The artificial disc 1, further receiving front and rear side portions 1 of the front and rear sides 10, 11 and the movable member 5 of the member 4
３，１４にも、複数個の小穴からなる移植骨補填用の穴３２，３３が開設されている。 To 3,14, the holes 32 and 33 for transplantation bone substitute comprising a plurality of small holes are opened. この場合、移植骨と椎骨本体との融合を確実にするためには、受け部材４と可動部材５の嵌合度合いが変わることがあっても穴３２と穴３３が必ず連通していることが必要であり、従って、外側の前後両側部１０，１１における穴３２を丸穴とし、 In this case, in order to ensure the fusion of the bone graft and the vertebral body, it is receiving member 4 and the hole 32 and the hole 33 even if the change fitting degree of the movable member 5 is in communication always communicated requires, therefore, a hole 32 in the outer front and rear side portions 10 and 11 and the round hole,
内側の前後両側部１３，１４における穴３３を前記丸穴３２に連通する縦長穴としている。 A hole 33 inside the front and rear side portions 13 and 14 are vertically long hole communicating with the circular hole 32.
【００２８】上記人工椎間板１はまた、受け部材４の前後両側部１０，１１における左右側端部の一方に移植用補助器具である後述するホルダー２の先端部を係止させるための係止手段３４が設けられており、この係止手段３４はホルダー２の先端部に設けられる係止部４１の形状に対応した形態とする必要があるが、本実施形態の場合は、受け部材４の前後両側部１０，１１の一方の側端部を、可動部材５の前後両側部１３，１４の対応する側端部よりも僅少長だけ外側に張り出させるようにして、 [0028] The artificial disc 1 also receives a locking means for locking the tip of the holder 2 to be described later is transplantation aid to one of the left and right side end portions of the front and rear sides 10, 11 of the member 4 34 is provided, this locking means 34 must be in a form corresponding to the shape of the locking portion 41 disposed on a distal portion of the holder 2, in this embodiment, the front and rear receiving member 4 one side end of the side portions 10 and 11, so as to overhang outward by slight length than the corresponding side edge of the front and rear side portions 13 and 14 of the movable member 5,
この張り出し部分に縦に細長小穴を開設した構造となしている。 Vertically and form an elongated small hole opened a structure to this overhang. このように係止手段３４が設けられることによって、後述されるが人工椎間板１を前記ホルダー２で支持して患者の背後から隣り合う椎骨本体間にスムーズかつ容易に案内することができるとともに、ホルダー２の取り外しも簡単に行える。 By thus locking means 34 are provided, it is possible to smoothly and easily guided between the vertebral body but is later adjacent the back of the patient and supports the artificial disc 1 in the holder 2, the holder 2 of removal also can be performed easily.
【００２９】図２には、本発明の第２の実施の形態に係る人工椎間板１の態様が斜視図で拡大示される。 [0029] Figure 2, embodiments of the prosthetic disc 1 according to the second embodiment of the present invention is shown enlarged in perspective. この図２に示される人工椎間板１は第１の実施の形態の前記人工椎間板１に類似し、対応する各部材には同一の参照符号が付されている。 The artificial disc 1 shown in FIG. 2 is similar to the artificial intervertebral disc 1 of the first embodiment, and the corresponding members are denoted by the same reference numerals. この実施形態における特徴とされる点は、前述した人工椎間板１が内嵌合方式であるのとは異なり、可動部材５を受け部材４に対し前後両側部１ The point being characterized in this embodiment, unlike an inner fitting method is artificial disc 1 described above, both side portions around 1 to member 4 receives the movable member 5
３，１４が前後両側部１０，１１の外面に接触して外嵌合できるように形成したことであり、また、この構成に伴って、外側の前後両側部１３，１４における穴３２を丸穴とし、内側の前後両側部１０，１１における穴３３ 3,14 and it was formed so as to be outside fitted in contact with the outer surface of the front and rear side portions 10 and 11, also with this configuration, the hole 32 outside the front and rear side portions 13 and 14 round hole and the hole 33 inside the front and rear side portions 10 and 11
を前記丸穴３２に連通する縦長穴となし、また、稼働部材５の前後両側部１３，１４の一方の側端部を、受け部材４の前後両側部１０，１１の対応する側端部よりも僅少長だけ外側に張り出させるようにして、この張り出し部分に縦に細長小穴からなる係止手段３４を設けてなる構成としたものである。 The Vertical hole and without communicating with the circular hole 32, also a one side end portion of the front and rear side portions 13 and 14 of the operating member 5, from the corresponding side edge of the front and rear side portions 10 and 11 of the receiving member 4 be made to overhang outward by slight length, in which longitudinally has an elongated eyelet formed by the locking means 34 provided having the configuration in the overhang. この人工椎間板１における作用・効果の点に関しては、第１の実施の形態の前記人工椎間板１と同様であることは言うまでもない。 In terms of operation and effect of the artificial intervertebral disc 1, it goes without saying that the same as the artificial disc 1 of the first embodiment.
【００３０】図３には、本発明の第３の実施の形態に係る人工椎間板１の態様が拡大示されていて、（イ）は平面図、（ロ）は高さ最高時の正面図、（ハ）は高さ最高時の右側面図、（ニ）は高さ最低時の正面図である。 [0030] FIG. 3 is a third embodiment have been shown embodiments of the prosthetic disc 1 according to the embodiment of the expansion of the present invention, (a) is a plan view, (b) the height sterling front view, (c) is a right side view when the height up, (d) is a front view when the height minimum.
【００３１】図３に図示の第３の実施の形態に係る人工椎間板１は、受け部材４と、可動部材５と、一対の間隔調整駒部材６，７と、間隔調整ボルト８と５つの各部材を含んで構成される。 The artificial disc 1 according to the third embodiment shown in FIG. 3, the receiving member 4, and the movable member 5, a pair of gap adjustment bridge member 6, 7, each of the five the spacing adjustment bolts 8 configured to include a member. この各部材は、人体の骨質環境に適応した材質、例えばチタン合金により所定の形状に形成されている。 Each member is formed into a predetermined shape by a material adapted to human bone environment, for example a titanium alloy.
【００３２】受け部材４は、底部１７及び該底部１７の前後両側縁から立ち上げた前後両側部１８，１９を備えて、上面部及び左右両側端面部が開口した四角形トラフ状を成しており、底部９表面が椎骨本体に面接触する平らな面になっている。 The receiving member 4 is provided with a front and rear side portions 18 and 19 launched from the front and rear side edges of the bottom 17 and the bottom portion 17 has a quadrangular shape trough of the upper surface portion and the right and left side end surface portion is open , the bottom 9 surface has a flat surface to surface contact with the vertebral body. この受け部材４は、底部１７の内面に長手方向の左右両端部から内方部に向け中央部に至る手前の個所まで上り勾配となる一対のテーパー内底面２３，２４がそれぞれ設けられるとともに、前記中央部を窪みに形成している。 The receiving member 4 has a pair of tapered inner bottom surface 23 and 24 consisting of longitudinal left and right end portions on the inner surface of the bottom portion 17 and the up slope to just before the point reaching the central portion toward the inner portion are provided respectively, the It is formed in the recess a central portion.
【００３３】一対の間隔調整駒部材６，７は、同じ角台形の駒に形成されていて外周の四周面における下面を前記一対のテーパー内底面２３，２４に摺接させるテーパー下面２５，２６に、上面を該テーパー下面２５，２６ The pair of distance adjusting bridge member 6 and 7, the tapered bottom surface 25, 26 for sliding contact with the lower surface to the pair of tapered inner bottom surface 23, 24 in the four sides faces of the outer periphery formed to have the same angular trapezoidal piece , wherein an upper surface tapered lower surface 25 and 26
と対称関係をなすテーパー面に歯形を有するテーパー歯形２７，２８に、前面及び後面を受け部材４の前後両側部１８，１９の内面に対し内摺接させる平坦面にそれぞれ形成していて、受け部材４内の一対のテーパー内底面２３，２４上に同軸配置に収設されている。 And a tapered tooth 27 having a tooth profile on the tapered surface symmetrical relation, to form each of the flat surfaces to inner sliding against the inner surface of the front and rear side portions 18, 19 of the member 4 receives the front and rear surfaces, receiving is Osamu設 coaxially arranged on a pair of tapered inner bottom surface 23, 24 of the member 4.
【００３４】間隔調整ボルト８は、一対の間隔調整駒部材６，７の一方の、例えば右側の駒部材７に、その中心部に設けた貫通孔を通して遊嵌挿し、他方の、例えば左側の駒部材６に、その中心部に設けたねじ孔を通して螺挿して、受け部材４内にその長手方向に延ばして収設される。 The gap adjusting bolt 8 is provided for one, for example, the right side of the bridge member 7 of the pair of gap adjusting bridge member 6, inserted loosely through the through hole provided at its center portion, the other, for example, the left frame the member 6, and screwed through a screw hole provided at the center thereof, is Osamu設 by extending the receiving member 4 in its longitudinal direction. この間隔調整ボルト８は、右端部の頭部３７、例えば六角穴付き頭部を、その端面部に凹設されてなる六角穴で実現される係止部３８を用いて図示しないが六角セット棒からなる間隔調整治具により正逆に回転操作することによって、一対の間隔調整駒部材６，７を一対のテーパー内底面２３，２４上において受け部材４の中央部に対し同期的に接近させ或いは離間させることが可能である。 The gap adjusting bolt 8, the head 37 of the right end, for example, a hexagon socket head, not shown hexagonal set rod with an engagement portion 38 which is realized by a hexagonal hole formed by recessed in the end face portion by rotational operation in forward and reverse by the distance adjusting jig made of, or synchronously moved closer to the central portion of the member 4 receives a pair of gap adjustment bridge member 6 on a pair of tapered inner bottom surface 23, 24 it is possible to separate.
【００３５】可動部材５は、頂部２０及び該頂部２０の前後両側縁から立ち下げた前後両側部２１，２２を備え、頂部２０表面を底部１７の表面に平行なかつ椎骨本体に接する平らな面に形成する一方、前後両側部２１， The movable member 5 is a flat surface in contact with the parallel and vertebral body includes a front and rear side portions 21 and 22 falls from the front and rear side edges, a top 20 surface to the surface of the bottom portion 17 of the top 20 and the apex portion 20 while forming, the front and rear sides 21,
２２の左右両端縁部を受け部材４の一対のテーパー内底面２３，２４に対応した中央部に向け下り勾配をなすテーパー歯形２９，３０に形成して、受け部材４内に両テーパー歯形２９，３０を一対の間隔調整駒部材６，７の両テーパー歯形２７，２８に噛み合わせ、かつ、前後両側部２１，２２を受け部材４の前後両側部１８，１９の内面に内摺接させて、前記長手方向に直交する間隔調整方向の移動可能に収設している。 And a tapered tooth 29, 30 which form a directed descending slope in the central portion corresponding to a pair of tapered inner bottom surface 23, 24 of the right and left end edge portions of the receiving member 4 of 22, receiving both tapered teeth 29 on member 4, engagement 30 on both tapered teeth 27, 28 of the pair of gap adjusting bridge member 6, and, by Uchisuri against the inner surface of the front and rear side portions 18 and 19 of the receiving member 4 the front and rear side portions 21 and 22, It is movably Osamu設 spacing adjustment direction perpendicular to the longitudinal direction. すなわち、受け部材４ That is, the receiving member 4
の前後両側部１８，１９の中央部に穿設した縦長穴４９ Vertical holes 49 bored in the central portion of the front and rear side portions 18 and 19 of the
に挿通したピン５０を可動部材５の前後両側部２１，２ Front and rear pins 50 inserted through the movable member 5 on both sides 21,2
２の対応個所に凹設したピン穴に嵌着する等の手段によって、可動部材５を受け部材４に対して長手方向に直交する間隔調整方向にのみ移動させ得るようにすることが可能である。 By means such fits to the pin hole which is recessed in the second corresponding points, can be adapted to be moved only in the interval adjustment direction perpendicular to the longitudinal direction relative to the member 4 receives the movable member 5 .
【００３６】このような第３の実施の形態に係る人工椎間板１は、互いに噛み合っている関係の、間隔調整駒部材６のテーパー歯形２７と可動部材５のテーパー歯形２ The artificial disc 1 according to the third embodiment, the relationship that are engaged with each other, the tapered tooth 2 of the taper tooth 27 and the movable member 5 of the spacing adjustment bridge member 6
９並びに間隔調整駒部材７のテーパー歯形２８と可動部材５のテーパー歯形３０は、第１の実施の形態に係る人工椎間板１の歯形１５と歯形１６の場合と同じ形態であるラチェット歯形となっている。 9 and tapered teeth 30 of the taper tooth 28 and the movable member 5 of the spacing adjustment bridge member 7 is a ratchet tooth profile is the same form as that of the first tooth 15 of the prosthetic disc 1 according to an embodiment of the tooth 16 there. すなわち、受け部材４ That is, the receiving member 4
と可動部材５との間での離隔する方向の動きには追い歯可能、接近する方向の動きには歯止め可能としたラチェット歯形に形成されている。 A movable member 5 and the separation directions of the motion follow possible teeth between, it is formed on the ratchet teeth which enables the pawl in the direction of movement approaching. なお、各歯における歯すじ、歯面の構造の点については歯形１５と歯形１６の態様と同じことであるので、ここでは説明を省略する。 Incidentally, tooth trace of each tooth, so the points of the structure of the tooth surface is the same as the embodiment of the tooth 15 and tooth 16, and a description thereof will be omitted. このようにラチェット歯形に形成されることにより、間隔調整ボルト８を回すに際して、一対の間隔調整駒部材６，７を両者の間隔が狭まる方向への回転は追い歯の動きとなるため回転可能であり、これによって受け部材４ By thus formed with the ratchet teeth, upon turning the spacing adjustment bolts 8, rotation in the direction narrowing the distance between both the pair of gap adjustment bridge member 6, 7 rotatable for the movement of the follow teeth There, thereby receiving member 4
に対して可動部材５が間隔を拡げる方向に動かされる。 Movable member 5 is moved in a direction to expand the distance to.
一方、これとは逆の回転は止め歯の動きとなるため回転不能であり、可動部材５を受け部材４に対して間隔を狭める方向に動かすことはできないことが理解される。 On the other hand, the rotation of the contrary is unable to rotate because the movement of the pawl, it can not be moved in the direction of reducing the distance to member 4 receives the movable member 5 will be understood.
【００３７】上記人工椎間板１は、可動部材５の頂部２ [0037] The artificial disc 1, the top 2 of the movable member 5
０に移植骨補填用の穴３５が開設されており、さらにまた、この頂部２０及び受け部材４の底部１７の各表面が多数の微細な凹凸を有する粗化面３９に形成されている。 0 are holes 35 are opened for transplantation bone substitute in, it is further also formed on the roughened surface 39 in which each surface of the bottom 17 of the top portion 20 and the receiving member 4 has a number of fine irregularities. さらに、受け部材４の前後両側部における左右側端部の一方、例えば右側端部に、移植用補助器具であるホルダー２の先端部を係止させる係止手段３６が設けられている。 Furthermore, one of the left and right side end portions of the front and rear sides of the receiving member 4, for example, the right end portion, the locking means 36 is provided for locking the tip of the holder 2 is a transplantation aid. すなわち本実施形態の場合は、受け部材４の前側部１８、後側部１９の同じ一方の側端部を、可動部材５の前側部２１、後側部２２の対応する側端部よりも僅少長だけ外側に張り出させるようにして、この張り出し部分に縦に延びるあり溝を形成して、これを係止手段３ That is, when the present embodiment, the receiving member 4 of the front portion 18, the side edge portion of the same one of the rear side 19, the front portion 21 of the movable member 5, de minimis than the corresponding side edge of the rear side 22 only in so as to overhang the outer length, to form a dovetail groove extending longitudinally in the overhang, the locking means 3 it
６としている。 It is set to 6. このように係止手段３６が設けられることによって、後述されるが人工椎間板１を前記ホルダー２で支持し、あるいは支持を解くことが簡単かつ確実に行われる。 By thus locking means 36 are provided, but are described below to support the artificial disc 1 in the holder 2, or it is carried out easily and reliably to solve the support.
【００３８】図５及び図６には、本発明の実施の形態に係るホルダー２の両例の態様が拡大示され、いずれも（イ）は一部省略示正面図、（ロ）は左端面図である。 [0038] In Figures 5 and 6, both examples aspects of the holder 2 according to the embodiment of the present invention is shown enlarged, both (it) is partially omitted 示正 view, (b) is the left end surface it is a diagram.
先ず図５に図示される例のホルダー２は、第１の実施の形態に係る人工椎間板１に対応する移植用補助器具であり、両端部が開口する外径が４．５mm程度の細い中空導管４０と、この中空導管４０の先端部に設けられて人工椎間板１の前記係止手段３４に係脱可能に形成されてなる係止部４１と、中空導管４０の後部に設けられた把持部４２とを含んで構成される。 First holder 2 in the example illustrated in FIG. 5 is a transplantation aid corresponding to the artificial intervertebral disc 1 according to the first embodiment, the thin outer diameter both end portions are opened are on the order of 4.5mm hollow conduit 40, a locking portion 41 formed by detachably formed with the locking means 34 of the artificial intervertebral disc 1 provided at the tip portion of the hollow conduit 40, the grip portion 42 provided at a rear portion of the hollow conduit 40 configured to include a door. 係止部４１は、例えば周面が円弧面に形成される略Ｉ字形で、係止手段３４である細長小穴に介挿することができる厚さが薄い板片からなっていて、中空導管４０の先端部にその端部開口を塞がせないようにしながら溶接等によって一体に取付けられており、一方、把持部４２は、例えば表面が滑り止め加工された筒体により形成されて、中空導管４０の後部に嵌装して取付けられる。 The locking portion 41 is, for example, a substantially I-shaped peripheral surface is formed in a circular arc surface, a thickness of which can be interposed in the elongated eyelet is locking means 34 consist thin plate piece, hollow conduit 40 of it attached together by tip end thereof welding but avoid close the opening while the grip portion 42, for example, a surface is formed by a stop processed tubular body slip, hollow conduit It is mounted fitted to the rear of the 40.
【００３９】このようなホルダー２は、人工椎間板１の係止手段３４である対向する前記細長小穴間に係止部４ [0039] Such holder 2, the engaging portion 4 between the elongated small hole which faces a locking means 34 of the artificial intervertebral disc 1
１を該細長小穴に平行させるように介挿して、この状態から把持部４２により中空導管４０を約１／４回転させて係止部４１を対向する前記細長小穴間に架け渡すように回すことにより、係止部４１の外周縁部が両細長小穴に引っ掛かった状態となるので、これによって人工椎間板１をホルダー２の先端部で同軸的に支持することができる。 1 by inserting so as to parallel to the elongated small hole, turning as to bridge between the elongate eyelet facing the locking portion 41 is about 1/4 to rotate the hollow conduit 40 by the gripping portion 42 from this state Accordingly, since the outer peripheral edge of the engaging portion 41 in a state caught in both elongated eyelet, whereby it is possible to coaxially support the artificial disc 1 at the tip portion of the holder 2. 人工椎間板１からホルダー２を外したいときは、 When the artificial disc 1 want to remove the holder 2,
把持部４２で中空導管４０を更に約９０°回すようにすれば簡単に外せる。 Easily Hazuseru if so turn about a further 90 ° a hollow conduit 40 with the grip portion 42. なお、中空導管４０の中空部は、人工椎間板１の間隔調整を行うための後述する間隔調整治具３を挿通するための通路として、また、移植骨としての例えば細骨を導入するための通路として利用される。 Incidentally, the hollow portion of the hollow conduit 40, as a passage for inserting a gap-adjusting jig 3 to be described later for performing gap adjustment of the artificial intervertebral disc 1, also passageways for introducing e.g. fine as bone graft It is used as a.
【００４０】一方、図６に図示される例のホルダー２ On the other hand, the holder of the example illustrated in FIG. 6 2
は、第２の実施の形態に係る人工椎間板１に対応する移植用補助器具であって、図５に図示する前記ホルダー２ Is a transplantation aid corresponding to the artificial intervertebral disc 1 according to the second embodiment, the holder 2 illustrated in FIG. 5
に類似し、対応する各部材に対しては同一の参照符号が付される。 Similar to the same reference numerals are attached to the corresponding members. この例のホルダー２は、係止部４１が略まゆ形状の台形を成す「ありほぞ」からなっていて、図３に示される前記人工椎間板１のあり溝からなる係止手段３ Holder 2 in this example, the locking portion 41 forms a trapezoidal substantially cocoon shape consist "dovetail" locking means 3 consisting of the located artificial disc 1 groove shown in FIG. 3
６に対応した形状となしている点に特徴があり、その他の構造及び作用については図５に図示する前記ホルダー２と同様であるので、説明を省略する。 6 is characterized in that it without a corresponding shape, since the other structure and operation are the same as the holder 2 illustrated in FIG. 5, the description thereof is omitted.
【００４１】図７には、本発明の実施の形態に係る間隔調整治具３の態様が示され、（イ）は閉成状態の一部省略示正面図、（ロ）は閉成状態の左端面図、（ハ）は開成状態の要部示正面図、（ニ）は開成状態の左端面図である。 [0041] Figure 7 embodiment of the gap-adjusting jig 3 according to the embodiment of the present invention is shown, (a) it is partially omitted 示正 view of the closed state, (b) is a closed state left side view, (c) is a fragmentary 示正 view of an open state, (d) is a left end view of the open state. 図７を参照して、この間隔調整治具３は、図１に図示される第１の実施の形態に係る人工椎間板１の間隔調整を行うために使用される移植用補助器具であって、 Referring to FIG. 7, the gap adjusting jig 3 is a transplant auxiliary instrument used to perform the interval adjustment of the artificial intervertebral disc 1 according to the first embodiment illustrated in FIG. 1,
鞘管４３と、一対の間隔調整片４４，４５と、間隔調整ロッド４６とを含んで構成される。 Configured as a sheath tube 43, a pair of spacing adjusting pieces 44 and 45, and a gap adjusting rod 46.
【００４２】鞘管４３は、図５、図６に示される各ホルダー２における中空導管４０内に貫挿通し得る径及び長さを有する金属製の直管により形成される。 The sleeve pipe 43, FIG. 5, is formed by a straight pipe made of metal having a diameter and length may be transmural inserted into the hollow conduit 40 of each holder 2 shown in FIG. 一対の間隔調整片４４，４５は、略平行の対向位置が弾性保持されて鞘管４３の先端部に嘴状をなして鞘管４３延長方向に突設されている（図７（イ）参照）。 A pair of spacing adjusting pieces 44 and 45, substantially parallel opposed position are protruded at an beak in the sleeve pipe 43 extended direction to the distal end portion of the sheath tube 43 is elastically held (see FIG. 7 (a) ). 間隔調整ロッド４ Interval adjustment rod 4
６は、鞘管４３内に貫挿通し得る棒体に形成されていて、その先端部には球状の摺動子４７が設けられ、後部には例えば円盤状をなす操作部４８が設けられていて、 6, be formed in the rod which may transmural inserted into the sheath pipe 43, the the distal end portion is provided with a spherical slider 47, has the operation unit 48 to the rear forming for example a disk shape provided Te,
鞘管４３内に貫挿通して摺動子４７が一対の間隔調整片４４，４５間に介挿され、操作部４８が鞘管４３の後部外側に位置するように鞘管４３に組付けられる。 Slider 47 and transmural inserted into the sheath pipe 43 is interposed between a pair of spacing adjusting pieces 44 and 45, it is assembled to the sheath pipe 43 as the operation unit 48 is positioned in the rear outer sheath tube 43 .
【００４３】このような間隔調整治具３は、鞘管４３内に貫挿通した間隔調整ロッド４６を操作部４８で抽送操作することにより、一対の間隔調整片４４，４５間に介挿された摺動子４７を前後方向に移動させると、図７ [0043] Such gap-adjusting jig 3, by 抽送 operating the distance adjusting rod 46 which is transmural inserted into the sheath tube 43 at the operating unit 48, interposed between the pair of interval adjusting pieces 44, 45 moving the slider 47 in the front-rear direction, FIG. 7
（イ）、（ロ）の送入操作では摺動子４７が先側に移動するため、一対の間隔調整片４４，４５を略平行に対向させた閉成状態となすことができ、一方、図７（ハ）、 (B), can be made as feed for slider 47 is in ON operation moves to the front side, closed state in which substantially is parallel opposing pair of spacing adjusting pieces 44 and 45 (b), whereas, FIG. 7 (c),
（ニ）の抽出操作では摺動子４７が根元側に移動するため、一対の間隔調整片４４，４５を弾性に抗して押し拡げる開成状態となすことができる。 In the extraction operation (d) for the slider 47 is moved to the base side can be formed as open state to spread press against the pair of gap adjusting pieces 44, 45 to the elastic.
【００４４】以上述べた各実施の形態に係る人工椎間板１、ホルダー２及び間隔調整治具３を使用して、患者の腰部における椎間板に置換する手術を行うに際し人工椎間板１を患部に設置する手順の概要について以下に説明する。 The above artificial disc 1 according to the embodiments described, using a holder 2 and spacing adjusting jig 3, the procedure for installing the artificial disc 1 to the affected part in performing surgery to replace the disc in the patient's lumbar region a description will be given of the summary below.
【００４５】図１、図５及び図７を参照して、人工椎間板１を予め図１（ニ）の高さ最低時の状態にセットする。 [0045] Referring to FIGS. 1, 5 and 7, is set to the height lowest when the state of advance Figure 1 a prosthetic intervertebral disc 1 (d). この状態は、可動部材５を受け部材４に対して一側方から嵌め込ませることにより簡単に行える。 This condition is easily performed by causing fitted from one side against the member 4 receives the movable member 5. この人工椎間板１に対して、図５に示すホルダー２を段落番号〔００３９〕の項で説明した要領に基づいて係止部４１ For this artificial disc 1, the locking portion 41 on the basis of the procedure described holder 2 in the section paragraphs [0039] shown in FIG. 5
と係止手段３４との係合によりセットし、人工椎間板１ And set by the engagement of the locking means 34, an artificial disc 1
をホルダー２の先端部で同軸的に支持させる。 The is coaxially supported at the tip portion of the holder 2.
【００４６】次いで、ホルダー２で支持している人工椎間板１を患者の背中側から脊髄を避けながら患部に導き所定位置に設置する（図４参照）。 [0046] Next, the artificial disc 1 is supported by the holder 2 is placed in position leads to the affected area while avoiding the spinal cord from the back side of the patient (see FIG. 4). この状態でホルダー２の中空導管４０内に、図７（イ）、（ロ）の送入操作状態の間隔調整治具３を挿入し先端部の間隔調整片４ A hollow conduit 40 of the holder 2 in this state, FIG. 7 (b), the interval adjusting pieces 4 of feed inserts a gap-adjusting jig 3-in operation state of the tip portion (B)
４，４５を人工椎間板１の受け部材４と可動部材５の間に介挿させ、続いて操作部４８により間隔調整ロッド４ 4,45 was inserted between the receiving the artificial disc first member 4 and the movable member 5, followed by interval adjustment rod 4 by the operation unit 48
６を順次抽出操作して行くと、間隔調整片４４，４５がその弾性に抗して押し拡げられて行くので、可動部材５ When 6 successively extraction operation and the spacing adjusting pieces 44 and 45 go pushed open against its resilient, movable member 5
は、歯形１５，１６がラチェット歯形で追い歯方向の動きとなるために、受け部材４との間隔が拡がり、患者の椎間板形状（高さ）にフィットする状態に調整することができる。 Can teeth 15 and 16 to the tooth movement follow ratchet teeth, distance between the receiving member 4 is spread, adjusted to a state of fitting the patient's intervertebral disc shape (height). そして、この調整後の状態は、椎骨本体側から外力が加えられてもラチェット歯形の歯止め作用により動きが止められるので、患者に適した椎間高さに固定することができる。 The state after this adjustment, so even if an external force is applied from the vertebral body is stopped movement due pawl action of ratchet teeth may be secured to the intervertebral height appropriate for the patient.
【００４７】このようにして人工椎間板１のセットが終了すると、間隔調整治具３を送入操作して人工椎間板１ [0047] When the set of artificial disc 1 in this way is completed, the artificial intervertebral disc 1 by entering operated spaced adjustment jig 3
から外したのち、ホルダー２から引き抜き、次いで、ホルダー２を人工椎間板１から外して取り出し、かくして人工椎間板１の所定個所へのセットは完了する。 After removal from, withdrawal from the holder 2, then disconnect and remove the holder 2 from the artificial intervertebral disc 1, thus the set to a predetermined position of the artificial intervertebral disc 1 is completed.
【００４８】一方、図３に示される人工椎間板１のセットについては、図６に示すホルダー２と、人工椎間板１ Meanwhile, for a set of artificial disc 1 shown in FIG. 3, the holder 2 shown in FIG. 6, the prosthetic disc 1
の係止部３８の六角穴に適応した六角セット棒からなる間隔調整治具とを使用して行えば良く、その手順及び手段に関しては上述の説明内容と同じであるので、ここでは説明を省略する。 May be performed by using the distance adjusting jig made of hexagonal set rod adapted to the hexagonal hole of the locking portion 38 of, since for its procedures and means the same as the above description contents, not described here to.
【実施例】以下、本発明の実施例について添付図面を参照しながら説明する。 EXAMPLES Hereinafter, with reference to the accompanying drawings embodiments of the present invention. 図８には、本発明の第１実施例に係る人工椎間板の縦断面図が示される。 Figure 8 is a longitudinal sectional view of the artificial intervertebral disc according to the first embodiment of the present invention is shown. この実施例は、 This example,
図１に示される第１の実施の形態に係る人工椎間板１をベースにしたものであって、受け部材４の底部９及び可動部材５の頂部１２に接触面拡大板片５１及び接触面拡大板片５２がそれぞれ冠着されている。 The artificial disc 1 according to the first embodiment shown in FIG. 1 be one that is based, receiving member 4 of the bottom 9 and the contact surface enlarging plate piece 51 and the contact surface enlarging plate on top 12 of the movable member 5 piece 52 is capped, respectively. 接触面拡大板片５１，５２は受け部材４、可動部材５と同じ材質により形成されていて、これを用いることにより、椎骨本体との接触面積が拡大される結果、固定性を良くする点並びに荷重時の沈み込みを少なくする点で一層の効果が図れる。 Contact surface enlarging plate pieces 51 and 52 receiving member 4, be formed of the same material as the movable member 5, by using this, the results of the contact area with the vertebral body is expanded, and points to improve the fixing property It attained even more of the effect in terms of reducing the sinking at the time of load.
【００５０】実際に用いられる人工椎間板１の一例として、受け部材４の幅：２１mm、同奥行き：１０mm、同底部厚み：１．５mm、可動部材５の幅：１９mm、同奥行き：８．６mmで、全高さ：８．５〜１１．５mm、同頂部厚み：１．５mmのものに対して、接触面拡大板片５１ [0050] In fact as an example of an artificial intervertebral disc 1 to be used, the receiving member 4 Width: 21 mm, the depth: 10 mm, the bottom thickness: 1.5 mm, the movable member 5 having a width: 19 mm, the depth: at 8.6mm , overall height: 8.5～11.5Mm, the top thickness: to that of 1.5 mm, the contact surface enlarging plate piece 51
は、幅：２１mm、奥行き：１０mm、厚み：０．８mmのものが用いられ、また、接触面拡大板片５２は、幅：１９ The width: 21 mm, Depth: 10 mm, thickness: is used as a 0.8 mm, The contact surface enlarging plate piece 52 has a width: 19
mm、奥行き：１２mm、厚み：０．８mmのものが用いられる。 mm, depth: 12mm, thickness: those of 0.8mm are used.
【００５１】図９には、本発明の第２実施例に係る人工椎間板の態様が（イ）に正面図、（ロ）に右側面図で示される。 [0051] Figure 9 is a front view of embodiment of an artificial intervertebral disc according to a second embodiment of the present invention is (i), shown in the right side view in (b). この実施例は、図３に示される第３の実施の形態に係る人工椎間板１をベースにしたものであって、受け部材４の底部１７及び可動部材５の頂部２０を、両部材１７，２０における間隔調整方向（上下方向）に対して相互に対称関係となるテーパー面に形成した点に構成上の特徴があって、それ以外の構造は第３の実施の形態に係る人工椎間板１と同じである。 The examples are intended in which the prosthetic disc 1 according to the third embodiment shown in FIG. 3 based, the receiving base 17 and top 20 of the movable member 5 of the member 4, both members 17, 20 there is characterized in configuration in that formed on the tapered surface which becomes mutually symmetrical relationship with respect to the spacing adjustment direction (vertical direction) in the structure otherwise the same as the prosthetic disc 1 according to the third embodiment it is. この実施例では、前彎角度の矯正（但し、角度固定である）をしながら椎間高さの調整を併せて行わせることが可能である。 In this embodiment, correction of pre 彎角 degree (provided that fixed angle) it is possible to perform together the adjustment of intervertebral height while the.
【００５３】本発明に係る人工椎間板は、受け部材と可動部材との間の高さ（椎間高さに相当する）を調整する機構として、互いに噛み合う歯形で、かつ両部材４，５ [0053] artificial disc according to the present invention receives height between the member and the movable member as a mechanism for adjusting (corresponding to intervertebral height), with teeth engaged with each other, and both members 4,5
間での離隔する方向の動きには追い歯可能、接近する方向の動きには歯止め可能としたラチェット歯形により形成したから患者に適した椎間高さに調整することができ、しかも一旦調整した後は外力が加わっても椎間高さを低くする方向には不動であるため、高さ方向の固定性が非常に良い。 Separation directions of chase can teeth movement between, can be adjusted from was formed by the ratchet teeth which enables the pawl in the direction of movement approaching the intervertebral height appropriate for the patient, yet it is once adjusted after because the direction to lower the intervertebral height even when an external force is applied is immobile, fixed of the height direction is very good.
【００５４】また、本発明によれば椎骨本体側からの荷重をの底部と頂部との全面で受けることができるため、 [0054] Further, since it is possible to receive the entire surface of the bottom and top of the load from the vertebral body according to the present invention,
椎間荷重分布が均一となって、荷重時の沈み込みが殆どなく、安定性にも優れている。 Intervertebral load distribution becomes uniform, sinking is almost no time of the load, is excellent in stability. 特に、請求項１乃至請求項４に係る人工椎間板は、該椎間板内に椎間高さ可変構造がラチェット歯形以外は一切存在しなく広い空間が存在していることから、移植骨を多く充填でき、その結果、骨融合後の固定性が非常に強固になる利点がある。 In particular, the artificial disc according to claims 1 to 4, since the intervertebral variable height structures to the the disc exists a wide space not exist at all except ratchet teeth, can often filled with bone graft as a result, there is an advantage that the fixing property after bone fusion is very strong.
【００５５】さらに本発明に係るホルダー及び間隔調整治具は、上記人工椎間板に好適に用いられ、椎間板手術の際に人工椎間板の所定個所への設置並びに椎間高さの調整が遠隔位置から極めて容易にかつ的確に行えて、手術作業性の改善並びに手術時間の短縮を図ることができる。 [0055] Further holder and spacing adjustment jig according to the present invention is preferably used for the artificial disc, very from the installation and adjustment remote location of the intervertebral height to a predetermined position of the artificial disc during disc surgery easily and with appropriately performed, thereby shortening the improvement and operation time of the surgical workability.
【図１】本発明の第１の実施の形態に係る人工椎間板の態様を拡大して示し、（イ）は平面図、（ロ）は高さ最高時の正面図、（ハ）は高さ最高時の縦断面図、（ニ） [1] shows an enlarged embodiment of the artificial disc according to the first embodiment of the present invention, (a) is a plan view, (b) is a front view of the height up to the time, (c) the height vertical cross-sectional view at the maximum, (d)
は高さ最低時の縦断面図である。 Is a vertical sectional view when the height minimum.
【図２】本発明の第２の実施の形態に係る人工椎間板の拡大示した斜視図である。 2 is a perspective view showing the expansion of the artificial intervertebral disc according to a second embodiment of the present invention.
【図３】本発明の第３の実施の形態に係る人工椎間板の態様を拡大して示し、（イ）は平面図、（ロ）は高さ最高時の正面図、（ハ）は高さ最高時の右側面図、（ニ） [Figure 3] shows an enlarged embodiment of the artificial disc according to a third embodiment of the present invention, (a) is a plan view, (b) is a front view of the height up to the time, (c) the height right side view at the maximum, (d)
は高さ最低時の正面図である。 Is a front view at the time of height minimum.
【図４】図２図示の人工椎間板の設置状態を示す平面図である。 4 is a plan view illustrating an installation state of the artificial intervertebral disc of Figure 2 shown.
【図５】本発明の実施の形態に係るホルダーの例の態様を拡大して示し、（イ）は一部省略示正面図、（ロ）は左端面図である。 [5] according to the embodiment of the present invention showing an enlarged manner examples of the holder, (b) it is partially omitted 示正 view, (b) is a left side view.
【図６】本発明の実施の形態に係るホルダーの他例の態様を拡大して示し、（イ）は一部省略示正面図、（ロ） [6] according to the embodiment of the present invention showing an enlarged another example embodiment of the holder, (b) is partially omitted 示正 view, (b)
は左端面図である。 It is a left end view.
【図７】本発明の実施の形態に係る間隔調整治具の態様を示し、（イ）は閉成状態の一部省略して示す正面図、 7 shows an embodiment of a gap-adjusting jig according to the embodiment of the present invention, (a) is a front view partially showing the closed state,
（ロ）は閉成状態の左端面図、（ハ）は開成状態の要部示正面図、（ニ）は開成状態の左端面図である。 (B) is a left end view of the closed state, (c) is a fragmentary 示正 view of an open state, (d) is a left end view of the open state.
【図８】本発明の第１実施例に係る人工椎間板の縦断面図である。 8 is a longitudinal sectional view of the artificial intervertebral disc according to the first embodiment of the present invention.
【図９】本発明の第２実施例に係る人工椎間板の態様を示し、（イ）は正面図、（ロ）は右側面図である。 9 shows an embodiment of an artificial intervertebral disc according to a second embodiment of the present invention, (a) is a front view, (b) is a right side view.
【図１０】従来の人工椎間板の正面図である。 FIG. 10 is a front view of a conventional artificial disc.
１…人工椎間板 ２…ホルダー ３…間隔調整治具 ４…受け部材 ５…可動部材 ６…間隔調整駒部材 ７…間隔調整駒部材 ８…間隔調整ボルト ９…底部 １０…前側部 １１…後側部 １２… 1 ... artificial disc 2 ... holder 3 ... gap adjustment jig 4 ... receiving member 5 ... movable member 6 ... gap adjusting bridge member 7 ... gap adjusting bridge member 8 ... space adjusting bolt 9 ... bottom 10 ... front portion 11 ... back side 12 ...
頂部 １３…前側部 １４…後側部 １５… Top 13 ... front portion 14 ... back side 15 ...
歯形 １６…歯形 １７…底部 １８… Tooth 16 ... tooth 17 ... bottom 18 ...
前側部 １９…後側部 ２０…頂部 ２１… Front portion 19 ... rear side 20 ... top 21 ...
前側部 ２２…後側部 ２３…テーパー内底面 ２４… Front portion 22 ... rear sides 23 ... tapered inner bottom surface 24 ...
テーパー内底面 ２５…テーパー下面 ２６…テーパー下面 ２７… Taper in the bottom 25 ... tapered bottom surface 26 ... tapered bottom surface 27 ...
テーパー歯形 ２８…テーパー歯形 ２９…テーパー歯形 ３０… Taper tooth 28 ... tapered tooth 29 ... tapered tooth 30 ...
テーパー歯形 ３１…穴 ３２…穴 ３３… Taper tooth 31 ... hole 32 ... hole 33 ...
穴 ３４…係止手段 ３５…穴 ３６… Holes 34 ... locking means 35 ... hole 36 ...
係止手段 ３７…頭部 ３８…係止部 ３９… The locking means 37 ... head 38 ... locking portion 39 ...
粗化面 ４０…中空導管 ４１…係止部 ４２… Roughened surface 40 ... hollow conduit 41 ... engaging portion 42 ...
把持部 ４３…鞘管 ４４…間隔調整片 ４５… The holding portion 43 ... sheath pipe 44 ... gap adjusting piece 45 ...
間隔調整片 ４６…間隔調整ロッド ４７…摺動子 ４８… Interval adjustment piece 46 ... interval adjustment rod 47 ... slider 48 ...
操作部 ４９…縦長穴 ５０…ピン ５１… Operation unit 49 ... Vertical holes 50 ... pin 51 ...
接触面拡大板片 ５２…接触面拡大板片 ５３…分岐体 ５４… Contact surface enlarging plate piece 52 ... contact surface enlarging plate piece 53 ... branch body 54 ...
ブリッジ ５５…部品 Bridge 55 ... parts
───────────────────────────────────────────────────── フロントページの続き (72)発明者 土居 憲司 兵庫県神戸市中央区脇浜町１丁目３番18号 株式会社神戸製鋼所神戸本社内 Ｆターム(参考） 4C060 LL20 4C097 AA10 BB01 BB04 CC01 CC18 SC01 ────────────────────────────────────────────────── ─── front page of the continuation (72) inventor Kenji Doi, Hyogo Prefecture, Chuo-ku, Kobe, Wakinohama-cho 1-chome No. 3 No. 18 Kobe Steel, Ltd. Kobe headquarters in the F-term (reference) 4C060 LL20 4C097 AA10 BB01 BB04 CC01 CC18 SC01
【請求項１】 底部９及び該底部９の前後両側縁から立ち上げた前後両側部１０，１１を備え、底部９表面が椎骨本体に接触する平らな面に形成される受け部材４、 頂部１２及び該頂部１２の前後両側縁から立ち下げた前後両側部１３，１４を備え、頂部１２表面が底部９の表面に平行なかつ椎骨本体に接する平らな面に形成されて、受け部材４に対し前後両側部１３，１４が受け部材４の前後両側部１０，１１に内接する内嵌合又は外接する外嵌合によって組付けられる可動部材５を含み、 受け部材４の前後両側部１０，１１及び可動部材５の前後両側部１３，１４における各接触面部が互いに噛み合う歯形１５，１６に形成されて、この歯形１５，１６が受け部材４と可動部材５の間での離隔する方向の動きには追い歯可能、接近する方 1. A bottom 9 and with the front and rear side portions 10 and 11 launched from the front and rear side edges of the bottom part 9, the receiving member 4 is bottom 9 surface is formed on a flat surface which contacts the vertebral body, the top 12 and comprising a front and rear side portions 13 and 14 which falls from the front and rear side edges of said top 12, is formed on a flat surface in which the top portion 12 surface in contact with the parallel and vertebral body surface of the bottom 9, with respect to the receiving member 4 before and after includes a movable member 5 to be assembled by the outer fitting to fit or circumscribing inner inscribed in both front and rear sides 10 and 11 of the side portions 13, 14 receiving member 4, receiving front and rear side portions 10, 11 and the movable member 4 is formed on the tooth 15, 16 which each contact surface portion in the front and rear side portions 13 and 14 of the member 5 is engaged with each other, follow the spacing to the direction of movement between the member 4 and the movable member 5 the teeth 15 and 16 receive tooth possible, those who approach の動きには歯止め可能としたラチェット歯形からなることを特徴とする人工椎間板。 Artificial disc of in movement, characterized in that it consists of a ratchet tooth which enables pawl.
【請求項２】 受け部材４の底部９及び可動部材５の頂部１２に移植骨補填用の穴３１が開設されてなる請求項１に記載の人工椎間板。 2. A receiving member 4 of the bottom 9 and the artificial disc of claim 1, holes 31 for bone graft filling the top 12 of the movable member 5 is formed by opened.
【請求項３】 受け部材４の前後両側部１０，１１及び可動部材５の前後両側部１３，１４に移植骨補填用の穴３２，３３が開設されてなり、外側の前後両側部における穴は丸穴であり、内側の前後両側部における穴は前記丸穴に連通する縦長穴である請求項１又は２に記載の人工椎間板。 3. the holes 32 and 33 for bone graft filling the front and rear side portions 13 and 14 of the receiving front and rear side portions 10 and 11 and the movable member 5 of the member 4 is opened becomes, the the holes in the front and rear sides of the outer round a hole prosthetic intervertebral disc of claim 1 or 2 holes in both front and rear sides of the inner is a longitudinal bore which communicates with the round hole.
【請求項４】 受け部材４の前後両側部１０，１１と可動部材５の前後両側部１３，１４の何れかにおける左右側端部の一方に移植用補助器具であるホルダー２の先端部を係止させる細長小穴等の係止手段３４が設けられる請求項１、２又は３に記載の人工椎間板。 4. A receiving engaging the leading end of the holder 2 is a transplantation aid to one of the left and right side end portions of one of the front and rear sides 13, 14 of the front and rear side portions 10 and 11 and the movable member 5 of the member 4 the prosthetic intervertebral disc of claim 1, 2 or 3 locking means 34 of equal elongate eyelet to locked is provided.
【請求項５】 底部１７及び該底部１７の前後両側縁から立ち上げた前後両側部１８，１９を備え、底部１７表面が椎骨本体に接触する平らな面に形成され、底部１７ 5. comprises a bottom 17 and front and rear side portions 18 and 19 launched from the front and rear side edges of the bottom portion 17, bottom portion 17 is formed on the surface of a flat surface which contacts the vertebral body, a bottom portion 17
内面に長手方向の左右両端部から内方部に向け上り勾配となる一対のテーパー内底面２３，２４が設けられる受け部材４、 角台形を成し、外周面における下面が前記一対のテーパー内底面２３，２４に摺接させるテーパー下面２５，２ Receiving member 4 in which a pair of tapered inner bottom surface 23, 24 as the upward gradient toward the longitudinal direction of the left and right end portions to the inner portion on the inner surface is provided, angled trapezoid, tapered in the bottom lower surface of the pair of the outer peripheral surface 23 and 24 taper bottom surface 25,2 to sliding contact with the
６に、上面が該テーパー下面２５，２６と対称関係をなすテーパー面に歯形を有するテーパー歯形２７，２８ 6, a taper tooth 27 and 28 whose upper surface has a tooth profile in a tapered surface forming the tapered lower surface 25 and symmetrical relationship
に、前面及び後面が受け部材４の前後両側部１８，１９ The front and rear receiving the front and rear surfaces members 4 both side portions 18 and 19
に内摺接させる平坦面にそれぞれ形成されて、受け部材４内の一対のテーパー内底面２３，２４上に同軸配置に収設される一対の間隔調整駒部材６，７、 一対の間隔調整駒部材６，７の一方７に遊嵌挿し他方６ Each is formed as a flat surface which Uchisuri contact to receive a pair of gap adjusting bridge member 6 which is Osamu設 coaxially arranged on a pair of tapered inner bottom surface 23, 24 of the member 4, a pair of spacing adjustment piece the other 6 inserted loosely fitted to one 7 of the member 6, 7
に螺挿して受け部材４内にその長手方向に延ばして収設され、正逆回転の操作によって一対の間隔調整駒部材６，７を受け部材４の中央部に同期的に接近離間可能とした間隔調整ボルト８、 頂部２０及び該頂部２０の前後両側縁から立ち下げた前後両側部２１，２２を備え、頂部２０表面が底部１７の表面に平行なかつ椎骨本体に接する平らな面に形成され、前後両側部２１，２２の左右両端縁部が受け部材４ Its longitudinal direction extended is Osamu設, it was synchronously accessible spaced in central member 4 receives a pair of gap adjustment bridge member 6, 7 by the operation of the forward and reverse rotation to the threaded insert receiving member 4 interval adjusting bolt 8 includes a front and rear side portions 21 and 22 falls from the front and rear side edges of the top 20 and the apex portion 20, is formed on a flat surface in contact with the parallel and vertebral body upper portion 20 surface to the surface of the bottom 17, member 4 receives the left and right end edge portions of the front and rear side portions 21 and 22
の一対のテーパー内底面２３，２４に対応した中央部に向け下り勾配をなすテーパー歯形２９，３０に形成されて、受け部材４内に両テーパー歯形２９，３０を一対の間隔調整駒部材６，７の両テーパー歯形２７，２８に噛み合わせ、かつ、前後両側部２１，２２を受け部材４の前後両側部１８，１９に内摺接させて、前記長手方向に直交する間隔調整方向の移動可能に収設される可動部材５を含み、 互いに噛み合う可動部材５のテーパー歯形２９，３０と間隔調整駒部材６，７のテーパー歯形２７，２８とが、 A pair of formed tapered teeth 29, 30 which form a directed descending slope in the central portion corresponding to the tapered inner bottom surface 23 and 24, receiving member 4 inside the both tapered teeth 29, 30 of the pair of gap adjustment bridge member 6, engagement on both tapered teeth 27, 28 of 7, and, before and after the front and rear side portions 18, 19 of the side portions 21, 22 receiving member 4 by Uchisuri contact, allows movement of the spacing adjustment direction perpendicular to the longitudinal direction to include a movable member 5 to be Osamu設, and a tapered tooth 27 and 28 of the taper tooth 29, 30 and gap adjusting bridge member 6 of the movable member 5 meshing with each other,
受け部材４と可動部材５との間での離隔する方向の動きには追い歯可能、接近する方向の動きには歯止め可能としたラチェット歯形からなることを特徴とする人工椎間板。 Receiving member 4 and movable member 5 and the separation directions of the motion follow possible tooth between the prosthetic intervertebral disc which is characterized in that it consists of a ratchet tooth profile which enables the pawl in the direction of movement approaching.
【請求項６】 受け部材４の底部１７及び可動部材５の頂部２０に移植骨補填用の穴３５が開設されてなる請求項５記載の人工椎間板。 6. receiving member 4 of the bottom 17 and claim 5, wherein the prosthetic disc with a hole 35 for bone graft filling the top portion 20 of the movable member 5 is formed by opened.
【請求項７】 受け部材４の前後両側部における左右側端部の一方に移植用補助器具であるホルダー２の先端部を係止させるあり溝等の係止手段３６が設けられる請求項５又は６に記載の人工椎間板。 7. A receiving claim 5 engaging means 36 has engaged the distal end portion of such a groove holder 2 is a transplantation aid to one of the left and right side end portions are provided at both front and rear sides of the member 4, or artificial disc as set forth in 6.
【請求項８】 間隔調整ボルト８が頭部３７を備え、該頭部３７に移植用補助器具である間隔調整治具３を用いて回動操作するための係止部３８が設けられている請求項５、６又は７に記載の人工椎間板。 8. spacing adjustment bolt 8 comprises a head 37, locking portions 38 for rotational operation by using the distance adjusting jig 3 is a transplantation aids the head portion 37 is provided the prosthetic intervertebral disc of claim 5, 6 or 7.
【請求項９】 受け部材４の底部表面及び可動部材５の頂部表面が、多数の微細な凹凸を有する粗化面３９に形成される請求項１乃至請求項８のいずれかに記載の人工椎間板。 9. receiving a bottom surface and a top surface of the movable member 5 of the member 4, the artificial intervertebral disc according to any one of claims 1 to 8 is formed on the roughened surface 39 having a large number of fine irregularities .
【請求項１０】請求項４又は７に記載の人工椎間板１を支持して隣り合う椎骨本体間に案内するためのホルダー２であり、両端部が開口する中空導管４０と、該中空導管４０の先端部に設けられ人工椎間板１の前記係止手段に係脱可能に形成された係止部４１と、中空導管４０の後部に設けられた把持部４２とを含むことを特徴とするホルダー。 10. A holder 2 for guiding between the vertebral bodies adjacent supporting an artificial intervertebral disc 1 according to claim 4 or 7, a hollow conduit 40 having both ends opened, the hollow conduit 40 holder and the locking means the locking portion 41 that is detachably formed on the artificial disc 1 provided at the distal end portion, characterized in that it comprises a grip portion 42 provided at the rear of the hollow conduit 40.
【請求項１１】前記係止部４１が、中空導管４０を把持部４２でその軸周りに約９０°正逆回動操作することにより、前記係止手段に係脱可能な「ありほぞ」に形成される請求項１０記載のホルダー。 Wherein said locking portion 41 by approximately 90 ° about its axis a hollow conduit 40 with the grip portion 42 forward and reverse rotation operation, the disengaged possible "dovetail" with the locking means holder according to claim 10, wherein the formed.
【請求項１２】請求項４に記載の人工椎間板１の間隔調整を行うための間隔調整治具３であり、請求項１０記載のホルダー２における中空導管４０内に貫挿通し得る径及び長さの鞘管４３と、略平行の対向位置が弾性保持されて鞘管４３の先端部に突設されてなる一対の間隔調整片４４，４５と、鞘管４３内に貫挿通し得る棒体の先端部に球状の摺動子４７が設けられ、後部に操作部４８が設けられてなる間隔調整ロッド４６とを含み、鞘管４３ 12. the spacing adjusting jig 3 for performing gap adjustment of the artificial intervertebral disc 1 according to claim 4, diameter and length may be transmural inserted into the hollow conduit 40 in the holder 2 according to claim 10, wherein the sheath tube 43, a pair of spacing adjusting pieces 44, 45 substantially parallel opposing positions, which are projected is elastically held at the distal end of the sheath tube 43, the rod member may be transmural inserted into the sheath tube 43 tip spherical slider 47 is provided, and a gap adjusting rod 46 formed by the operation unit 48 is provided at a rear portion, the sheath tube 43
内に貫挿通した間隔調整ロッド４６を操作部４８で抽送操作することにより、一対の間隔調整片４４，４５間に介挿された摺動子４７を前後方向に移動して一対の間隔調整片４４，４５を開閉動可能としてなることを特徴とする間隔調整治具。 By 抽送 operating the operation unit 48 a distance adjustment rod 46 that is transmural inserted within a pair of spacing adjustment piece to move the slider 47 interposed between the pair of interval adjusting pieces 44, 45 in the longitudinal direction interval adjusting jig characterized by comprising the 44 and 45 as a possible opening-and-closing.
JP11015843A 1999-01-25 1999-01-25 Artificial intervertebral disk and auxiliary instrument for transplantation thereof Pending JP2000210315A (en)
JP11015843A JP2000210315A (en) 1999-01-25 1999-01-25 Artificial intervertebral disk and auxiliary instrument for transplantation thereof
JP2000210315A true JP2000210315A (en) 2000-08-02
ID=11900119
JP11015843A Pending JP2000210315A (en) 1999-01-25 1999-01-25 Artificial intervertebral disk and auxiliary instrument for transplantation thereof
JP (1) JP2000210315A (en)
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