Dental implant

Patent metadata

Field	Value
Publication number	US-9545291-B2
Application number	US-59614608-A
Country	US
Kind code	B2
Filing date	Apr 15, 2008
Priority date	Apr 17, 2007
Publication date	Jan 17, 2017
Grant date	Jan 17, 2017

Abstract

An implantable dental device comprising polymeric shape memory material for implantation into a cavity within alveolar bone of the jaw or within the root canal space of a tooth.

First claim

The invention claimed is:

1. An implantable dental device comprising:
a root member for implantation into a cavity in either alveolar bone or a root canal space of a tooth, wherein the root member includes at least one first portion comprising a polymeric shape memory material defining a collar portion which encapsulates an internal support structure, at least one second portion comprising a non-shape memory material, and an abutment mount for receiving a dental prosthesis, wherein the collar portion defines a non-threaded outer surface extending from the at least one second portion to the abutment mount, the polymeric shape memory material is activatable from a deformed state to a relaxed state upon input of energy to the polymeric shape memory material, wherein the deformed state is sized and shaped for insertion into the cavity, wherein the relaxed state has a size and shape that is laterally expanded relative to the deformed state for sealing engagement of the non-threaded outer surface of the collar portion with an inner wall of the cavity adjacent the abutment mount to thereby anchor the root member in position and to provide a seal between the root member and the inner wall of the cavity.

2. The device of claim 1 , wherein the root member is implantable as a single unit.

3. The device of claim 1 , wherein the root member comprises a first end, a second end distal thereto and an outer surface which extends between the first end and the second end, wherein at least a portion of the outer surface of the root member is defined by the non-threaded outer surface of the collar portion.

4. The device of claim 1 , further comprising a dental prosthesis attached to the abutment mount.

5. The device of claim 1 , wherein the at least one first portion of the root member comprises a second collar portion comprising the polymeric shape memory material extending from the at least one second portion and toward a distal end of the root member.

6. The device of claim 1 , wherein the non-shape memory material is a metallic material.

7. The device of claim 6 , wherein the at least one second portion comprising the non-shape memory material is arranged to abut the at least one first portion comprising the polymeric shape memory material and abutment of the polymeric shape memory material with the non-shape memory material prevents longitudinal expansion of the polymeric shape memory material on relaxation and allows lateral expansion thereof.

8. The device of claim 1 , wherein the non-threaded outer surface of the collar portion comprises a smooth outer surface extending from the at least one second portion to the abutment mount.

9. The device of claim 8 , wherein the collar portion is positioned adjacent a first proximal end of the root member opposite a distal second end of the root member, the collar portion forming a proximal seal with the inner wall of the cavity.

10. The device of claim 1 , wherein the root member comprises two or more adjoining segments, wherein at least one segment comprises the at least one first portion of the polymeric shape memory material and at least one other segment comprises a non-resorbable material, the at least one other segment comprising the at least one second portion.

11. The device of claim 1 , wherein the root member comprises a plurality of adjoined segments, wherein a first population of the adjoined segments comprises the polymeric shape memory material and a second population of the adjoined segments comprises a non-resorbable material, the second population of the adjoined segments including the at least one second portion, wherein the plurality of adjoined segments are arranged in an alternating sequence along some or all of the length of the root member, and wherein the first population of the adjoined segments define a non-threaded outer surface and the second population of the adjoined segments define a threaded outer surface.

12. The device of claim 1 , wherein the root member comprises a plurality of adjoined segments, wherein a first population of the adjoined segments comprises the polymeric shape memory material and a second population of the adjoined segments comprises a non-shape memory material, the second population of the adjoined segments including the at least one second portion, and wherein the plurality of adjoined segments are arranged in an alternating sequence along some or all of the length of the root member, and wherein the first population of the adjoined segments define a non-threaded outer surface and the second population of the adjoined segments define a threaded outer surface.

13. The device of claim 1 , wherein at least a distal portion of the root member is formed from a single contiguous portion comprising a third portion of the root member formed of the polymeric shape memory material.

14. The device of claim 1 , wherein the polymeric shape memory material comprises resorbable polymeric shape memory material.

15. The device of claim 1 , wherein the polymeric shape memory material comprises non-resorbable polymeric shape memory material.

16. The device of claim 1 , wherein an active agent is incorporated into the root member.

17. The device of claim 16 , wherein the active agent is selected from the group consisting of bone morphogenic proteins, antibiotics, anti-inflammatories, angiogenic factors, osteogenic factors, monobutyrin, omental extracts, thrombin, modified proteins, platelet rich plasma/solution, platelet poor plasma/solution, bone marrow aspirate, and cells sourced from flora or fauna, such as living cells, preserved cells, dormant cells, and dead cells.

18. The device of claim 1 , wherein the device has a generally elongate shape, a cylindrical shape or has a screw-shape.

19. The device of claim 1 , wherein the root member comprises reinforced polymeric material.

20. The device of claim 1 , wherein the root member comprises a combination of metal or a metal alloy and the polymeric shape memory material.

21. The device of claim 1 , wherein the root member comprises porous material.

22. A kit comprising the device of claim 1 and a dental prosthesis.

23. The device of claim 1 , wherein the root member comprises a first longitudinal segment having a threaded body portion comprising the at least one second portion formed of a metallic material, and the root member comprising a second longitudinal segment comprising the non-threaded collar portion formed of the polymeric shape memory material.

24. The device of claim 23 , wherein the root member further comprises a third longitudinal segment comprising another of the non-threaded collar portion formed of the polymeric shape memory material, the second and third longitudinal segments arranged on opposite sides of the first longitudinal segment, the second and third longitudinal segments each having the deformed state sized and shaped for insertion into the cavity and the relaxed state having a size and shape that is laterally expanded relative to the deformed state for engagement with the inner wall of the cavity to thereby anchor the root member in position, and wherein one of the second and third longitudinal segments is positioned adjacent a first end of the root member opposite a distal second end of the root member to form an enhanced seal between the root member and the inner wall of the cavity when transitioned from the deformed state to the relaxed state.

25. The device of claim 24 , wherein the non-threade

Assignees

• Arnold Peter
• Sarefjord Daniel
• Thompson Andrew
• Smith & Nephew

Inventors

• Arnold Peter
• Sarefjord Daniel
• Thompson Andrew

Classifications

• A61C8/0012 Primary

  characterised by the material or composition, e.g. ceramics, surface layer, metal alloy (use of specific materials A61K6/00) · CPC title

• A61C8/0033

  Expandable implants; Implants with extendable elements · CPC title

• A61C13/30

  Fastening of peg-teeth in the mouth · CPC title

• A61C2201/007

  using shape memory effect · CPC title