Temporary dental prosthesis

• US 7,798,812 B2
• Filed: 09/15/2005
• Issued: 09/21/2010
• Est. Priority Date: 09/23/2004
• Status: Active Grant

• Current Assignee: L P M Dental Development Ltd.
• Original Assignee: L P M Dental Development Ltd.
• Inventors: Last-Pollak, Mordehai
• Primary Examiner(s): Rodriguez; Cris L
• Assistant Examiner(s): ROSEN, ERIC J
• Application Number:
  US11/663,189
• Publication Number:
  US 20070259315A1
• Time in Patent Office: 1,832 Days
• Field of Search: 433/167, 433/168.1, 433/169, 433/179, 433/171, 433/172, 433/173, 433/174, 433/175, 433/176, 433/177
• US Class Current: 433/173
• CPC Class Codes: A61C 13/0001 In-situ dentures; Trial or temporary dentures
• CPC Class Codes: A61C 8/0012 characterised by the material or composition, e.g. ceramics, surface layer, metal alloy use of specific materials A61K6/00
• CPC Class Codes: A61C 8/0048 Connecting the upper structure to the implant, e.g. bridging bars A61C8/0028 takes precedence

Abstract

A temporary prosthesis for use during the osseointegration process of an installed dental implant includes load-absorbing properties and is mountable to the implant, providing an aesthetic appearance to the implant site, while preventing or minimizing loads on the implant itself.

Claims

1. A temporary dental prosthesis comprising:

a prosthesis body and at least one interface structure configured for mounting said prosthesis to at least one implant, wherein;

said prosthesis body comprises an external surface having a shape resembling that of a respective tooth,

said prosthesis body is configured for substantially absorbing externally-applied loads acting on the prosthesis body and for minimizing transmission of such externally-applied loads to at least the implant onto which said temporary prosthesis is to be mounted,

said shape of said prosthesis body external surface is deformed responsive to application of the externally-applied loads on said prosthesis body, and

said prosthesis body external surface is more resilient than the at least one interface structure.

2. The prosthesis according to claim 1, wherein said prosthesis body is made from a load-absorbing material.

3. The prosthesis according to claim 2, wherein said load-absorbing material comprises a resilient material capable of absorbing said loads by substantially being deformed from a nominal datum shape.

4. The prosthesis according to claim 2, wherein said prosthesis body comprises at least one pre-formed weakened structure configured to enable a first part of said prosthesis to deflect about said at least one pre-formed weakened structure in response to application thereon of said externally-applied loads.

5. The prosthesis according to claim 4, wherein

said at least one pre-formed weakened structure is configured to enable said first part of said prosthesis to break off from said prosthesis body in response to application thereon of said externally-applied loads having a magnitude greater than a predetermined threshold, wherein

said threshold is correlated to a predetermined safety limit configured to prevent excessive loads being transmitted to said implant onto which the prosthesis body is to be mounted.

6. The prosthesis according to claim 2, wherein said load-absorbing material comprises a material selected from the group consisting of:

rubber, silicone, nylon, polyethylene, copolymers, plastic, Teflon, compomers, elastomers, and other biocompatible materials.

7. The prosthesis according to claim 3, wherein said prosthesis body is substantially a solid body made of said resilient material.

8. The prosthesis according to claim 2, wherein said prosthesis body is made from a plurality of layers of suitable materials.

9. The prosthesis according to claim 2, wherein

said prosthesis body is deformed under said externally-applied loads such that at least one part of the external surface of the prosthesis body is displaced from an unstressed datum position by a displacement, wherein

under said externally-applied loads corresponding to regular masticating actions between the jaws, said displacement is in the range of about 0.5 mm to about 5 mm.

10. The prosthesis according to claim 1, wherein said prosthesis body comprises a load-absorbing structure capable of absorbing said externally-applied loads by substantially being deformed from a nominal datum shape.

11. The prosthesis according to claim 2, wherein said at least one interface structure comprises an engagement arrangement for engaging the prosthesis with said implant.

12. The prosthesis according to claim 11, wherein said at least one interface structure comprises a healing band at a periphery thereof adapted for promoting healing of gum tissues when said at least one interface structure is connected to said implant.

13. The prosthesis according to claim 11, wherein said at least one interface structure comprises at least one material selected from the group consisting of:

titanium, gold, metal alloys, ivory, porcelain, ceramics, plastics, Teflon, and any other biologically compatible material.

14. The prosthesis according to claim 2, wherein said prosthesis body is a crown prosthesis.

15. The prosthesis according to claim 2, wherein

said prosthesis is a bridge prosthesis and comprises at least two spaced interface structures, each adapted for mounting onto separate implants, and

further comprises a pontic section connected laterally on either side thereof to one of two retainer portions, wherein

each of said retainer portions comprises one of said spaced interface structures.

16. The prosthesis according to claim 1, wherein said prosthesis body is integrally joined to said interface structure.

17. A kit of temporary prostheses, comprising

a plurality of different prosthesis bodies and a plurality of interface structures as defined in claim 1, and

further comprising a mounting arrangement for mounting said prosthesis to one of said interface structures, wherein

each of said interface structures is adapted for mounting to one of a variety of said implants, and

wherein each of said interface structures is adapted for mounting to one of said plurality of prosthesis bodies.

21. The prosthesis according to claim 2, wherein said prosthesis body is a bridge prosthesis, and comprises at least two spaced interface structures, each adapted for mounting onto separate implants.

22. The prosthesis according to claim 1, wherein said prosthesis body is reversibly mountable with respect to one of said at least one interface structure.

23. The prosthesis according to claim 3, wherein

said prosthesis body comprises a cavity and a skin enclosing said cavity made of said resilient material, said skin defining said external surface.

18. A method for implanting a permanent prosthesis onto at least one implant embedded in an intraoral cavity, comprising:

(a) embedding one of said at least one implant such that an upper part thereof is exposed with respect to surrounding gingiva;

(b) during a healing period of the one of said at least one implant with respect to bone tissue associated with said embedding step (a), mounting a temporary prosthesis on the one of said at least one implant, wherein;

said temporary prosthesis comprises an external surface having a shape resembling that of a respective tooth,

said prosthesis body is configured for substantially absorbing externally-applied loads acting thereon and for minimizing transmission of such externally-applied loads to the one of said at least one implant,

said shape of said prosthesis body external surface is deformed responsive to application of the externally-applied loads on said prosthesis body, and

said prosthesis body external surface is more resilient than the at least one interface structure; and

(c) after said healing period replacing said temporary prosthesis with a substantially non-deformable permanent prosthesis capable of reacting to and transmitting the externally-applied loads to the one of said at least one implant.

19. The method according to claim 18, wherein

said prosthesis body is integrally joined to the one of said at least one interface structure.

20. The method according to claim 18, wherein

said prosthesis body is reversibly mountable with respect to the one of said at least one interface structure.

24. A temporary dental prosthesis comprising:

a prosthesis body and at least one interface structure configured for mounting said prosthesis to at least one implant, wherein;

said prosthesis body comprises an external surface having a shape resembling that of a respective tooth,

said prosthesis body external surface is configured for substantially absorbing externally-applied loads acting on the prosthesis body and for minimizing transmission of such externally-applied loads to at least the implant onto which said temporary prosthesis is to be mounted,

said prosthesis body external surface is more resilient than the at least one interface structure, and

said interface structure is made from a rigid or semi rigid material.