Source: https://patents.google.com/patent/US5368483A/en
Timestamp: 2018-04-19 10:25:20
Document Index: 345816449

Matched Legal Cases: ['art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5']

US5368483A - Device-for fixing a dental prosthesis to a jaw bone - Google Patents
Device-for fixing a dental prosthesis to a jaw bone Download PDF
US5368483A
US5368483A US08095119 US9511993A US5368483A US 5368483 A US5368483 A US 5368483A US 08095119 US08095119 US 08095119 US 9511993 A US9511993 A US 9511993A US 5368483 A US5368483 A US 5368483A
US08095119
The stated lateral surface section of the abutment may be, for example--particularly in the case of a subgingival position of the end face of the base--parallel to the axis of the device and cylindrical. However, particularly in the case of a supragingival position of the end face of the base, the stated lateral surface section may also be conical or may be curved in the axial section, in which case it makes an angle of, preferably, not more than about 30° with the axis of the device at its end adjacent to the base.
That lateral surface section of the base which is adjacent to the outer edge of the annular surface widens, preferably in a trumpet-like manner, toward the said edge and preferably makes an obtuse angle or possibly approximately a right angle with the annular surface enclosing the mouth of the hole of the base. The lateral surface section of the abutment, which section abuts the outer edge of the annular surface of the base when the device is assembled, preferably makes an acute angle with the annular surface of the base and a stop surface of the abutment, which surface is adjacent to said annular surface. The sum of the two stated angles is preferably at least 135°, even better at least 150° and preferably at most 180°. If the sum of the two angles is 180°, the abutting lateral surface sections of the base and of the abutment are then continuously adjacent to one another in the axial section.
The elongated base 4 has a cylindrical section 4a which is provided with an external thread 4b. Adjacent to the cylindrical section 4a is a section 4c which thickens in a trumpet-like manner away from said section 4a. In axial section, the lateral surface section 4r bordering said section 4c externally is uniformly and continuously curved, as in the case of the surface which borders the stated extension of the hole 1a. At its upper end most greatly inclined relative to the axis 7, the lateral surface section 4r of the section 4c makes an angle of at most 30° and, for example, about 15° to 25° with said axis. That end of the base 4 which is located in FIGS. 1 and 2 at the top on the free end of the thickening section 4c forms the end face 4d of said base. The base 4 is provided with a hole 4e which is coaxial with the axis 7, consists of a blind hole and has a mouth in the end face 4d. The hole 4e has a cylindrical base section 4f which is provided, at least in one part, with an internal thread 4g and therefore forms a threaded hole. The hole 4e has, between the internal thread 4g and the end face 4d, an extension 4h which widens toward said end face and is bordered, at least for the most part, by a conical inner surface 4i which makes an angle of, preferably, at least 5° and, preferably, at most 15° with the axis 7. The end face 4d is formed by an end face which encloses the mouth of the hole 4e and consists, at least for the most part, of an annular surface 4k which is inclined away from the axis 7 conically outward toward that end of the base which is opposite the end face 4d. The outer edge 4m of said annular surface also forms the outer edge of the end face 4d. The angle of inclination between the conical annular surface 4k and the axis 7 is about 20° to 70° and namely, for example, about 45°. The annular surface 4k makes an obtuse angle with that end of the lateral surface section 4r which is adjacent to the outer edge 4m of said annular surface, said lateral surface section being curved in axial section. The cylindrical section 4a of the base 4 furthermore has a hole 4n which is coaxial with the axis 7, consists of a blind hole and has a mouth at that end of the base 4 which is opposite the end face 4d. The cylindrical section 4a is furthermore provided with some holes 4p which pass through its lateral surface and enter the hole 4n. The base 4 consists of a one-piece member comprising a metallic material, namely titanium. The cylindrical section 4a is also provided with, for example, a coating applied by a plasma coating method and likewise consisting of titanium.
The elongated, one-piece, metallic abutment 5 which consists, for example, of titanium, has an inner part 5a and an outer part 5b. If the abutment 5 is connected to the base 4 in the assembled device according to FIG. 2, the inner part 5a is located in the hole 4e of the base 4 while the outer part 5b is arranged outside the base 4. The inner part 5a has a thread part 5c with an external thread 5d and an essentially cylindrical thick part 5e which is rotationally symmetrical with respect to the axis 7 and whose diameter is slightly larger than the external diameter of the external thread 5d. The thick part 5e is provided with a small bevel at its end facing the thread part 5c. The outer part 5d consists of an even thicker covering section 5f adjacent to the thick part 5e. Said covering section is bordered, at its end facing the base 4, by an annular surface, of which at least the outermost part serves as a conical stop surface 5g. This makes the same angle with the axis 7 as the annular surface 4k of the base 4 and rests against the annular surface 4k in the assembled device. The outer edge of the stop surface 5g and the cylindrical lateral surface section 5h of the covering section 5f, which lateral surface section is adjacent to this outer edge, have the same diameter as the outer edge 4m of the annular surface 4k. The lateral surface section 5h makes an acute angle with the stop surface 5g and, in the assembled device, also with the annular surface 4k of the base 4. The sum of this angle and the obtuse angle made by the surfaces 4k and 4r of the base is between 125° and 180° and is, for example, at least 150°. A conical end section 5i which tapers away from the covering section 5f is adjacent to said covering section. The conical lateral surface of said end section is connected at its further end by a likewise conical shoulder surface 5k to the cylindrical lateral surface section 5h of the covering section 5f and, together with the shoulder surface 5k, forms a shoulder having an obtuse angle in axial section. The length of the cylindrical lateral surface section 5h and the distance of the shoulder surface 5k from the stop surface 5g is preferably at least 2 mm, preferably up to about 5 mm and, for example, about 3 mm. The abutment 5 is also provided with an axial threaded blind hole 5m which has a mouth at the free end of the end section 5i.
The conical annular surface 4k of the base 4 and the conical stop surface 5g of the abutment are completely rotationally symmetrical with respect to the axis 7 and are completely smooth around said axis, i.e. are not interrupted by slots or grooves or the like. The surfaces 4k, 5g therefore rest against one another, without gaps, around the axis 7 and the mouth of the hole 4e of the base 4. The covering section 5f furthermore covers the end face 4d of the base 4, which end face is present below the gingiva 2, up to the outer edge 4m of the annular surface 4k. The covering section 5f of the abutment abuts the edge 4m of the base 4 essentially without joints and without gaps. At the abutment point--i.e. at the edge 4m--the lateral surface sections 4r and 5h make an angle of between 135° and 180° and namely at least 150° with one another. As a result of this embodiment of the section 4c of the base 4 and of the abutment covering section 5f covering the latter, it is possible at least substantially to prevent cavities in which bacteria can develop from being formed under the gingiva 2 in the region of the end face 4d of the base during healing and growing together of the previously cut open gingiva 2.
3. A device as claimed in claim 2, wherein the conical inner surface of the base and the conical outer surface of the shell make angles of at least 5° and at most 15° with the axis.
4. A device as claimed in claim 1, wherein the annular surface and the stop surface make an angle of at least 20° and at most 70° with an axis of the device.
7. A device as claimed in claim 6, wherein the two abutting lateral surface sections make, with the annular surface, angles whose sum is 135° to 180°.
17. A device for fixing a dental prosthesis to a jaw bone having a hole, the device comprising:
a base to be received in the jaw bone hole and including a hole and an end surface, the hole of the base having a cylindrical hole portion having an internal thread, and a widened portion extending between the cylindrical hole portion and the end surface and having an outwardly tapering inner conical surface defining a mouth located at the end surface;
an abutment for supporting the dental prosthesis outside the jaw bone and detachably connected to the base, the abutment including an inner part having an external thread cooperating with the internal thread of the cylindrical hole portion of the base for connecting the abutment with the base, and an outer part to be located outside of the jaw bone for supporting the dental prosthesis and formed integrally with the inner part; and
a shell located in the widened portion of the stepped hole between the inner part of the abutment and the inner conical surface of the widened portion of the hole and having an outer conical surface resting against the inner conical surface of the widened portion;
wherein the base has an annular surface surrounding the mouth, and the outer part of the abutment has a stop surface for resting against the annular surface of the base.
18. A device as claimed in claim 17, wherein each of the base, the abutment, and the shell is formed as a one-piece member.
31. A device as claimed in claim 28, wherein the annular surface and the stop surface of the abutment make an angle of at least 20° and at most 70° with an axis of the device.
US08095119 1993-06-14 1993-08-20 Device-for fixing a dental prosthesis to a jaw bone Expired - Lifetime US5368483A (en)
US08095119 US5368483A (en) 1993-06-14 1993-08-20 Device-for fixing a dental prosthesis to a jaw bone
US5368483A true US5368483A (en) 1994-11-29
US08095119 Expired - Lifetime US5368483A (en) 1993-06-14 1993-08-20 Device-for fixing a dental prosthesis to a jaw bone
ES2129336A1 (en) * 1996-11-29 1999-06-01 Univ De A Coruna Osteo-integrable dental prosthesis with implantation and fixing by levers and spigots
WO2010141342A2 (en) * 2009-06-01 2010-12-09 University Of Maryland, Baltimore Snap-on two-piece emergence profile healing abutment
WO2015066438A1 (en) * 2013-11-01 2015-05-07 Chien-Ping Ju Double-cushioned dental implant
WO1991008713A1 (en) * 1989-12-07 1991-06-27 Zl Microdent-Attachment Gmbh Threaded body for securing a multi-part tooth replacement
"Bonefit Basic Information" pp. 1-6, Institute Strauman.
"Journal of Oral Implantalogy" vol. XVI, No. 4, 1990 pp. 297-301.
"The New Concept of ITI Hollow-Cylinder and Hollow Screw Impants:" 1988 Franz Sutter/Andre Schroeder, DDS, PhD Daniel A. Buser, DDS pp. 161-172.
Bonefit Basic Information pp. 1 6, Institute Strauman. *
Journal of Oral Implantalogy vol. XVI, No. 4, 1990 pp. 297 301. *
The New Concept of ITI Hollow Cylinder and Hollow Screw Impants: 1988 Franz Sutter/Andre Schroeder, DDS, PhD Daniel A. Buser, DDS pp. 161 172. *
WO2010141342A3 (en) * 2009-06-01 2011-04-21 University Of Maryland, Baltimore Snap-on two-piece emergence profile healing abutment
JP2015519935A (en) * 2012-05-07 2015-07-16 ジュ，チェン‐ピン Implant of a tooth with a cushion
CN104334114B (en) * 2012-05-07 2018-02-13 捷钛生医股份有限公司 Buffered dental implant
CN104334114A (en) * 2012-05-07 2015-02-04 朱建平 Dental implant with cushion
US9848961B2 (en) 2013-11-01 2017-12-26 JTI Biomed Corp. Double-cushioned dental implant
EP0629384A1 (en) 1994-12-21 application
EP0629384B1 (en) 1996-11-27 grant
Owner name: INSTITUT STRAUMANN AG, GERMANY
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SUTTER, FRANZ DR.;MUNDWILER, ULRICH;REEL/FRAME:006702/0145
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:INSTITUT STRAUMANN AG;REEL/FRAME:017546/0232