Source: https://patents.google.com/patent/JP4977323B2/en
Timestamp: 2019-10-21 06:53:23
Document Index: 449403227

Matched Legal Cases: ['art 10', 'art 10', 'art 10', 'art 10', 'art 10', 'art 2']

JP4977323B2 - Intervertebral implant - Google Patents
JP4977323B2
JP4977323B2 JP2004567675A JP2004567675A JP4977323B2 JP 4977323 B2 JP4977323 B2 JP 4977323B2 JP 2004567675 A JP2004567675 A JP 2004567675A JP 2004567675 A JP2004567675 A JP 2004567675A JP 4977323 B2 JP4977323 B2 JP 4977323B2
JP2006513752A (en
2003-02-06 Application filed by ジンテーズ ゲゼルシャフト ミト ベシュレンクテル ハフツング filed Critical ジンテーズ ゲゼルシャフト ミト ベシュレンクテル ハフツング
2011-07-22 First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=32831653&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JP4977323(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
US-A2000 / 0010511 Michelson (Patent Document 2) discloses an intervertebral implant having two holes with inner threads on its front surface, into which a bone screw with threads can be introduced. is there. The disadvantage of this implant is, on the one hand, the situation where the bone screw can loosen again and is not protected against unscrewing or dropping. On the other hand, another disadvantage is that the bone screw is completely self-fixed in the main part of the implant and therefore the latter is subjected to a relatively large load.
In this respect, the present invention provides an improvement. The object of the present invention is to provide an intervertebral implant in which a rigid connection is produced continuously by the fixing means, so that no loosening occurs between the intervertebral implant and the bone fixing means even when the bone structure weakens. It is to be. Furthermore, because the bone anchoring element is tensioned through the individually formed front plate, the implant main body is hardly subjected to stress, that is, multiple tension. Furthermore, the fixation plate allows simultaneous stabilization of all bone fixation elements.
The bone anchoring element has a smooth screw head that results in no rigid coupling to the implant, or has a thread, conical screw head, or enlarged screw head, resulting in a rigid coupling of the implant. Either occurs. In both cases, however, the bone anchoring element is protected against subsequent unscrewing, knocking or dropping by the anchoring plate.
Preferably, the longitudinal fixation element is used in the form of a bone screw with a screw head and a shaft, but the screw head preferably comprises an external thread, which is on the inner thread of the hole in the intervertebral implant. Correspond. In the second possible rigid coupling mode, bone screws are preferably used, in which case the screw head tapers conically towards the shaft and the conicity of the screw head is a hole in the intervertebral implant. It corresponds to the conicity of.
The intervertebral implant further has a fixation plate 18 which is parallel to the front plate 8 by a screwed connection so that the holes 13 in the front plate 8 are partly removed from the fixation plate 18. It can be fixed. The fixing plate 18 has a central hole 17 for this purpose. Correspondingly, the front plate 8 has a central hole 15 with an inner thread 14 for receiving the fixing means 16 in the form of screws.
The four holes 13 in the front plate 8 have an inner thread 11, so that a longitudinal fixing element 20 in the form of a screw received therein can be rigidly coupled to the front plate 8.
The front plate 8 is made of titanium, and the three-dimensional main portion 10 is made of non-reinforced plastic that is transparent to X-rays. As shown in FIG. 5/6, the front plate 8 is formed as an insertion portion of the main portion 10 and is disposed so as to be vertically movable with respect to the horizontal central plane 7. For this purpose, the main part 10 has a semi-cylindrical groove 27 that runs parallel to the vertical central plane 12 at the transition of the left side 3 or right side 4 (FIG. 5) to the front side 5. Suitably, the left and right front plates 8 (FIG. 6) have semi-cylindrical rails 28 that run similarly and are similarly dimensioned. Thereby, the anterior plate--in the manufacture of the intervertebral implant--both outer rails 28 are simply inserted and positioned in the corresponding grooves 27 of the main part 10.
The hole 9 passes through the horizontal central plane 7, and only the axis 24 of the longitudinal fixing element 20 introduced therein intersects the horizontal central plane 7 of the main part 10.
The longitudinal fixation element 20 is formed as a bone screw. As shown in FIG. 2, the longitudinal fixing element 20 introduced into the hole 13 has a screw head 21, a tip 22, a shaft 23 and a shaft 24. The screw head 21 is provided with an outer thread 25, which corresponds to the inner thread 11 of the hole 13 , so that the screw head 21 can be fixed rigidly in the hole 13 . The shaft 23 is provided with a thread 26 that is self-boring and self-cutting. The load flank angle of the thread 26 is 12.5 °, and the inclination angle is 8 °.
a) Inserting an intervertebral implant in the form of a three-dimensional main part 10 into two adjacent vertebral bodies using a suitable instrument;
b) Screw the four longitudinal fixation elements 20 in the form of bone screws into the vertebral body through the holes 13 in the anterior plate 8 using a suitable sight.
c) the fixing plate 18 is fixed to the front plate 8 via the screw heads 21 of the longitudinal fixing element 20 by means of fixing means 16 in the form of screws, so that the longitudinal fixing element 20-thus the screw itself The screw head 21 is held between the front plate 8 and the fixed plate 18 and protected against relative movement with respect to the main part 10 (for example, by dropping or unscrewing). The fixing means 16 in the form of a screw is preferably provided with a thread, which is superior due to the large self-suppression.
FIG. 3 is an exploded view showing an intervertebral implant. FIG. 4 shows a longitudinal bone fixing means in the form of a screw. FIG. 2 is a front view showing the intervertebral implant according to FIG. 1. FIG. 2 is a side view showing the intervertebral implant according to FIG. 1. FIG. 7 is a three-dimensional detail view showing the main part of the intervertebral implant showing the coupling element with the anterior plate according to FIG. 6. Fig. 6 is a three-dimensional detail view showing the anterior plate of the intervertebral implant showing the coupling element with the main part according to Fig. 5; FIG. 5 shows an intervertebral implant fully assembled with an anterior plate and a fixation plate.
1 top part 2 lower third left side 4 hole 10 main portion 11 internal threads 12 vertical center plane of the right side surface 5 front 6 rear 7 horizontal middle plane 8 before the plate 9 main portion 10
13 Hole 14 in front plate 8 Inner thread 15 Central hole 16 Fixing means 17 Central hole 18 Fixing plate 19 Fixing element 20 Fixing element 21 Screw head 22 Tip 23 Shaft 24 Shaft 25 Outer thread 26 Screw thread
H) The hole (9) does not completely penetrate the front surface (5),
I) said intervertebral implant has a fixed plate (18), the fixing plate (18) and is fixed possible flat row the relative front plate (8) in the main portion (10), said hole (9) can be at least partially covered by the fixing plate (18);
Vertebral characterized in that it is designed to be coupled to the rigid longitudinal direction of the fixing element (20) to the plate (8) before said at least one accepts a plurality of holes (13) in J) the front plate (8) Interim implant.
Intervertebral implant according to claim 1, characterized in that the fixation plate (18) can be fixed parallel to the anterior plate (8) by a screw connection, a bayonet joint or a click lock.
4. Intervertebral implant according to claim 3, characterized in that the anterior plate (8) has a central hole (15) for receiving a fixing means (16) comprising an inner thread (14).
The said front plate (8) of the said three-dimensional main part (10) is designed as an insertion part, and is arrange | positioned slidably perpendicularly | vertically with respect to the said horizontal center plane (7). The intervertebral implant according to any one of -4.
Intervertebral implant according to claim 5, characterized in that at least one of the plurality of holes ( 13 ) in the anterior plate (8) has an inner thread (11).
Wherein said at least one hole (13) of the intervertebral implant according to claim 5 or 6, characterized in that the conically tapered toward said the bottom (2).
8. Intervertebral implant according to claim 7, characterized in that the conical hole ( 13 ) has a conical angle which is smaller than the resulting friction angle.
The intervertebral implant according to any one of claims 1-8, characterized in that there is no that said hole (9) through said left side (3) and said right side (4).
The intervertebral implant according to any one of claims 1-9 wherein at least two holes (9), characterized in that running parallel.
To any one of claims 1-10 axis (24), characterized in that to form an angle beta in the range of the horizontal center plane (7) 20 ° to 60 ° with respect to the hole (9) The intervertebral implant as described.
To any one of claims 1 to 11 the shaft (24), characterized in that to form an angle alpha in the range of the 10 ° to 45 ° to the vertical center plane (12) of the bore (9) The intervertebral implant as described.
13. Intervertebral implant according to any one of claims 1 to 12 , characterized in that the hole (9) does not penetrate the horizontal central plane (7).
The has a smooth inner wall holes (9), wherein the threads on the smooth inner wall of the bore (9) by the screw head in the longitudinal direction of the fixing element of metal (20) can be cut The intervertebral implant according to any one of claims 1 to 13 .
The hole (9) is provided with a smooth inner wall, and a screw thread can be formed on the smooth inner wall of the hole (9) by means of a screw head of a fixing element (20) in the longitudinal direction of the metal. The intervertebral implant according to any one of claims 1 to 13 .
In intervertebral implant according to any one of claims 1 to 15 having the bore (9) of at least two can be introduced in the longitudinal direction of the fixing element (20),
17. Intervertebral implant according to claim 16 , characterized in that the screw head (21) contacts the fixation plate (18) fixed to the main part (10) or the front plate (8).
The at least one longitudinal fixing element (20) extends through the upper part (1) and the at least one longitudinal fixing element (20) extends through the lower part (2). The intervertebral implant according to 16 or 17 .
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DE69534042D1 (en) 1994-12-09 2005-04-07 Sdgi Holdings Inc Adjustable vertebral body replacement
ES2244871T3 (en) 1996-10-22 2005-12-16 Howmedica Osteonics Corp. Surgical drill separator.
AT247442T (en) 1997-09-30 2003-09-15 Ct Pulse Orthopedics Ltd Tubular support body for bridging two vertebral
AU2002213124B2 (en) 2000-10-11 2006-02-23 Michael D. Mason Graftless spinal fusion device
JP4331481B2 (en) 2001-01-30 2009-09-16 ジンテーズ ゲゼルシャフト ミト ベシュレンクテル ハフツング Bone implant, especially intervertebral implant