Implant assembly for anchoring an artificial tooth

• US 5,104,318 A
• Filed: 09/20/1990
• Issued: 04/14/1992
• Est. Priority Date: 09/20/1990
• Status: Expired due to Fees

• Current Assignee: 2848-4293 Quebec Incorporated
• Original Assignee: 2848-4293 Quebec Incorporated
• Inventors: Piche, Jean, Rochon, Pierre
• Primary Examiner(s): Wilson, John J.
• Assistant Examiner(s): Smith, Jeffrey A.
• Application Number:
  US07/585,693
• Time in Patent Office: 572 Days
• Field of Search: 433/172, 433/173, 433/174, 433/175, 433/193, 433/194
• US Class Current: 433/174
• CPC Class Codes: A61C 8/0048 Connecting the upper structure to the implant, e.g. bridging bars A61C8/0028 takes precedence
• CPC Class Codes: A61C 8/0068 with an additional screw

Abstract

An implant assembly for the anchoring of an artificial tooth in a jawbone comprises a root fixture for anchoring into the jawbone; a metal sleeve resting on top of the root fixture and having a tapering upper section acting as a male element; and a connector element having a lower part secured to the root fixture and an upper part holding the metal sleeve, the upper part being covered by the sleeve. The assembly further includes a combination made up of an artificial tooth having a bore and a counterbore, and a metal insert solid with the tooth and mounted within the counterbore. The insert is cup-shaped at one end and, acts as a female element. It also includes an outwardly flaring internal lateral wall. The tapering upper section and the outwardly flaring lateral wall are shaped and sized so as to fit snuggly one into the other in the manner of a male and female joint (coupling). A screw arrangement tightly secures the tooth combination to the root fixture through the connector element.

Claims

1. An implant assembly for the anchoring of an artificial tooth in a jawbone, said assembly comprising:

a root fixture constructed to be anchored into the jawbone;

a metal sleeve having a lower section resting on top of said root fixture and a tapering upper section acting as a male element, said upper section being formed with a bore opening at the top thereof, said bore defining a retaining flange within said sleeve;

a connector element adapted to be slid into the sleeve, said element having a lower part adapted to be secured to said root fixture and an upper part projecting above said lower part, said upper part being wider than said lower part and sized to be slidably received into said bore in the upper section of the sleeve, wherein when said connector element is slid into said sleeve, said upper part is covered by said sleeve and bears on said retaining flange to hold said sleeve onto said fixture;

a tooth combination including an artificial tooth having a bore and a counterbore therethrough, said combination further including a metal insert solid with said tooth and mounted within said counterbore;

said insert having a cup-shaped end including an outwardly flaring internal lateral wall;

said insert having a cup-shaped end including an outwardly flaring internal lateral wall;

said insert being further shaped and sized for said outwardly flaring lateral wall to fit snugly over said sleeve tapering upper section;

means on said sleeve tapering section and on said outwardly flaring lateral wall of said insert for preventing relative rotation between said tooth combination and said sleeve; and

means for tightly securing said tooth combination to said root fixture through said connector element.

2. An assembly as claimed in claim 1, wherein said sleeve tapering upper section is concave and said insert outwardly flaring lateral wall is convex.

3. An assembly as claimed in claim 1, wherein said rotation-preventing means are axial tongues and grooves adapted to form joints and provided respectively on said insert flaring lateral wall and on said sleeve tapering section.

4. An assembly as claimed in claim 1, wherein said insert flaring lateral wall and said sleeve upper and lower sections are circular in transverse cross section.

5. An implant assembly for the anchoring of an artificial tooth in a jawbone, said assembly comprising:

a root fixture constructed to be anchored into the jawbone;

a metal sleeve having a lower section resting on top of said root fixture and a tapering upper section acting as a male element;

a connector element adapted to be slid into the sleeve, said element having a lower part adapted to be secured to said root fixture and an upper part projecting above said lower part, said upper part being covered by said sleeve when slid therein and adapted to hold said sleeve onto said fixture;

a tooth combination including an artificial tooth having a bore and a counterbore therethrough, said combination further including a metal insert solid with said tooth and mounted within said counterbore;

said insert having a cup-shaped end including an outwardly flaring internal lateral wall;

said insert being further shaped and sized for said outwardly flaring lateral wall to fit snugly over said sleeve tapering upper section;

means for tightly securing said tooth combination to said root fixture through said connector element; and

wherein said sleeve tapering upper section is concave and said insert outwardly flaring lateral wall is convex.

6. An implant assembly for the anchoring of an artificial tooth in a jawbone, said assembly comprising:

a root fixture constructed to be anchored into the jawbone;

a metal sleeve having a cylindrical lower section resting on top of said root fixture and an upper section tapering from said lower section said upper section being formed with a bore opening at the top thereof, said bore defining a retaining flange within said sleeve;

a connector element adapted to be slid into the sleeve, said element having a lower part secured to said root fixture and an upper part projecting above said fixture, said upper part being wider than said lower part and sized to fit into said bore in the upper section of the sleeve, wherein when said connector element is slid into said sleeve, said upper part is covered by said sleeve and bears on said retaining flange to hold said sleeve onto said fixture;

said upper part being formed with a bore opening at the top thereof;

a nut solid with said upper part at the top thereof and coaxial with said bore of said upper part;

a tooth combination including an artificial tooth having a bore and a counterbore therethrough, said combination further including a metal insert solid with said tooth and mounted wholly within said tooth counterbore;

said insert having a cup-shaped end including a transverse bottom wall, formed with a screw hole therethrough, and a lateral wall flaring outwardly from said bottom wall;

said insert being further shaped and sized for said outwardly flaring lateral wall to fit snugly over said sleeve tapering upper section with said bottom wall standing above said nut of said connector element;

means on said sleeve tapering section and on said outwardly flaring lateral wall of said insert for preventing relative rotation between said tooth combination and said sleeve; and

a securing screw having a stem passing through said screw hole of said bottom wall, threading into said nut of said connector element and extending into the bore at the top thereof, the head of said screw resting on said insert bottom wall, wherein said screw clamps said tooth combination on said connector element.

7. An assembly as claimed in claim 6, wherein said sleeve tapering upper section is concave and said insert outwardly flaring lateral wall is convex.

8. An assembly as claimed as in claim 6, wherein said rotation-preventing means are axial tongues and grooves forming joints and provided respectively on said insert flaring lateral wall and on said sleeve tapering section.

9. An assembly as claimed in claim 6, wherein said insert flaring lateral wall and said sleeve upper and lower sections are circular in transverse cross section.

10. An assembly as claimed in claim 6, wherein

said sleeve has a counterbore having a polygonal shape opposite said bore in said sleeve;

said root fixture is formed with an open bore and a nut is fixed to said fixture at the open end of said fixture bore;

said lower part of said connector element is a screw threaded through said fixture nut and extending into said fixture bore; and

said sleeve polygonal bore fits over said nut to prevent relative rotation between said sleeve and said root fixture.

11. An assembly as claimed in claim 10, wherein said rotation preventing means are axial tongues and grooves forming joints and provided respectively on said insert flaring lateral wall and on said sleeve tapering section.

12. An assembly as claimed in claim 10, wherein said insert flaring lateral wall and said sleeve upper and lower sections are circular transverse cross section.