Implant arrangement and device

• US 20050202370A1
• Filed: 12/19/2002
• Published: 09/15/2005
• Est. Priority Date: 12/28/2001
• Status: Active Grant

• Current Assignee: Nobel Biocare Services AG (Envista Holdings Corporation)
• Original Assignee: Nobel Biocare AB (Danaher Corporation)
• Inventors: Brajnovic, Izidor
• Granted Patent: US 7,175,434 B2
• Time in Patent Office: Days
• US Class Current: 433/181
• CPC Class Codes: A61C 8/0048 Connecting the upper structure to the implant, e.g. bridging bars A61C8/0028 takes precedence

Abstract

In an arrangement with implant and attachment part/dental bridge, the latter comprises one or more recessed walls. The implant is designed or can cooperate with a portion which can be arranged on a spacer sleeve belonging to the implant and extends substantially parallel to the recessed wall. The attachment part and its respective recessed wall is arranged with displaceability in the main longitudinal direction of the implant relative to the outer surface of the portion. The portion is arranged to be expandable so that, in a given position of longitudinal displacement, it is possible to achieve interaction between outer surfaces of the portion and the recessed wall and thus anchoring of the attachment part to the portion or the implant. The invention also relates to a device with two or more implants and dental bridge. By means of the invention, discrepancies between dental bridge and the implants can be taken up in an effective and rapid securing principle.

Claims

1. An arrangement with implant (9) and attachment part (11), in which the attachment part comprises a recessed wall (12a) and the implant is designed or can cooperate with a portion (10b), preferably on a spacer sleeve applied to the implant, wherein the attachment part and its recessed wall are arranged with displaceability in the main longitudinal direction of the implant relative to the outer surface of the portion, and in that the portion is arranged to be expandable so that in a given position of longitudinal displacement it is possible to achieve interaction between the outer surface of the portion and the recessed wall and thus anchoring of the attachment part to the portion.

2. The arrangement as claimed in patent claim 1, wherein said portion (12b) is substantially cylinder-shaped and comprises parts (c-j) which extend adjacent to one another and which, during the expansion, can be pressed outward in the radial direction (R), wherein the mutually adjacent parts are arranged with internal surfaces which combine to form an internal inner surface (10b″

), and wherein the portions (10b) are arranged to be expandable by means of a fastening screw (13) which is provided with an outer surface (13b) which can cooperate with said inner surface (10b′

″

), the mutually adjacent parts being expanded radially as a function of the position of insertion of the screw in the implant.

3. The arrangement as claimed in patent claim 2, wherein the portion constitutes front parts of a spacer (10) arranged at or on the upper parts (9b) of the implant.

4. The arrangement as claimed in claim 2, wherein the recessed wall (12a) is arranged in a bridge sleeve (12) or directly in a bridge material (11).

5. The arrangement as claimed in claim 1, wherein both the recessed wall (12a) and the outer surface (12b′

) of the portion are substantially cylindrical.

6. The arrangement as claimed in claim 4, wherein the spacer sleeve is made of hard titanium (MGA 007) and wherein the bridge sleeve is made of soft titanium (MFA-002).

7. The arrangement as claimed in claim 3, wherein the parts extending adjacent to one another project into the recess (12) with the recessed wall (12b) by at least ⅔

of their lengths (L′

).

8. The arrangement as claimed in claim 3, wherein the parts extending adjacent to one another have lengths (L′

) which substantially correspond to or are slightly smaller than the total length (L) of the spacer sleeve.

9. The arrangement as claimed in claim 2, wherein the fastening screw (13) is made of gold, and wherein the outer surface designed as a truncated cone is located at the head of the screw and is arranged with a half cone angle (α

) of ca. 40°

C.

10. The arrangement as claimed in claim 2, wherein the outer surface (10b″

) of the portion is designed with irregularities, by means of which the outer surface(s) cooperate.

11. The arrangement as claimed in claim 2, wherein the parts arranged adjacent to one another are arranged, during the expansion, to work with movements of the order of 2/10 to 4/10, for the purpose of preventing deformation or movements in the material which exceed the modulus of elasticity.

15. The arrangement of claim 1, wherein the arrangement is a dental bridge.

16. The arrangement of claim 1, wherein the spacer sleeve extends substantially parallel to the recessed wall.

17. The arrangement of claim 1, wherein the irregularities comprise spikes.

18. The arrangement of claim 11, wherein the parts arranged adjacent to one another are arranged during expansion, to work with movements of ca. 3/10 mm.

12. A device with two or more implants (19, 16, 17) and an attachment part (11) which can cooperate with these, in which the attachment part comprises recesses for application to the implants via portions arranged or applied thereon which are intended to extend into the recesses (12e), wherein each recess is arranged to be displaceable in the longitudinal direction of the respective implant relative to the respective portion, wherein, upon anchoring of the attachment part to the portions, the longitudinal displacement of the attachment part in relation to the portions (10b) can be determined by means of the relative longitudinal displacement position, between one of the recesses and the portion cooperating therewith, wherein the position or positions arising between other recess(es) or portion(s) form anchoring positions without length displacement-determining function, and wherein said portions are arranged to be expandable so as to obtain, in said longitudinal displacement positions, cooperation between outer surfaces of the portions and the recessed walls and thus multi-point anchoring of the attachment part to the implants.

13. The device as claimed in claim 12, wherein the portions are situated on the spacer sleeve which is applied on the implant, wherein the spacer sleeve at its front or upper end has parts (c-j) which are arranged adjacent to one another and which are arranged to be expandable in substantially the radial directions, and wherein the mutually adjacent parts are expandable by means of a fastening screw via external or internal surfaces set at an inclination or designed as truncated cones, the degree of expansion being dependent on the position of insertion of the fastening screw.

14. The device as claimed in claim 13, wherein the internal spaces of the spacer sleeves and/or of the bridge sleeves constitute spaces for thixotropic bactericidal agent.

19. The device of claim 12, wherein the device comprise a bridge.