Prosthetic implant and method for forming a prosthetic implant

Patent metadata

Field	Value
Publication number	US-9249055-B2
Application number	US-85387010-A
Country	US
Kind code	B2
Filing date	Aug 10, 2010
Priority date	Aug 10, 2009
Publication date	Feb 2, 2016
Grant date	Feb 2, 2016

Abstract

One embodiment of the present invention is a unique prosthetic implant and method for making a prosthetic implant. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for prosthetic implants. Further embodiments, forms, features, aspects, benefits, and advantages of the present application shall become apparent from the description and figures provided herewith.

First claim

What is claimed is:

1. A bone-implantable prosthetic device, comprising:
an interface portion operative to interface the bone-implantable prosthetic device with an other structure; and
a stem coupled to said interface portion, wherein the stem is structured for implantation to a desired depth into a bone tissue, and wherein the stem includes:
a metallic body having a length corresponding to the desired depth of implantation; wherein said metallic body includes a support structure and a hollow pin, fin and/or lattice structure formed as a unitary structure and configured to transfer load between said stem and the bone tissue, wherein said pin, fin and/or lattice structure includes an outer ring shape that is integral with, disposed radially outward of, and fully encircles said support structure such that an offset is provided to create a space between the outer ring shape and the support, said pin, fin and/or lattice structure further including an inner ring shape that is integral with and fully encircles said support structure, the inner ring shape being disposed radially inward of the outer ring shape, and said pin, fin and/or lattice structure further including an intermediate ring shape that is integral with and fully encircles said support structure, the intermediate ring shape being disposed radially inward of the outer ring shape and outward of the inner ring shape.

2. The bone-implantable prosthetic device of claim 1 , wherein the interface portion is a femoral head.

3. The bone-implantable prosthetic device of claim 2 , wherein the other structure is a hip joint socket.

4. The bone-implantable prosthetic device of claim 1 , wherein said stem includes a hollow channel.

5. The bone-implantable prosthetic device of claim 4 , further comprising a bone growth agent disposed in said hollow channel.

6. The bone-implantable prosthetic device of claim 5 , further comprising a plug operative to seal said hollow channel.

7. The bone-implantable prosthetic device of claim 6 , wherein said plug is resorbable.

8. The bone-implantable prosthetic device of claim 6 , wherein said plug is a time-release plug.

9. The prosthetic implant of claim 1 , wherein the ring shape extends past an end of the support structure and to the desired depth of implantation such that the support structure fails to reach the desired depth of implantation.

10. A prosthetic implant, comprising:
an interface portion operative to interface with an other structure; and
a stem coupled to said interface portion, wherein the stem is structured for implantation to a desired depth into a bone tissue, and wherein the stem includes:
a hollow body having a metallic outer ring structure, wherein the hollow body has a length corresponding to a desired depth of implantation, and wherein said outer ring structure fully encircles a central support member said hollow body and includes a first plurality of openings forming a metallic external lattice structure;
a metallic inner ring structure disposed in said hollow body inward of said outer ring structure, wherein said inner ring structure includes a second plurality of openings forming a metallic internal lattice structure;
a metallic intermediate ring structure disposed in said hollow body inward of said outer ring structure and outward of said inner ring structure, wherein said intermediate ring structure includes a third plurality of openings forming a metallic intermediate lattice structure; and
the central support member being integral with and disposed within said hollow body radially inward of said outer ring structure such that an offset is provided to create a space between the outer ring structure and the central support member.

11. The prosthetic implant of claim 10 , wherein the openings extend through the outer ring structure to expose an interior of the hollow body to ingrowth of the bone tissue.

12. The prosthetic implant of claim 10 , wherein the external lattice structure is defined by a strut mesh.

13. The prosthetic implant of claim 10 , wherein the external lattice structure is defined by a Warren girder.

14. The prosthetic implant of claim 10 , wherein a strut structure of the external lattice structure is tuned to achieve a stiffness of said hollow body corresponding to that of human bone tissue.

15. The prosthetic implant of claim 10 , further comprising a blind opening in said outer ring structure.

16. The prosthetic implant of claim 15 , further comprising at least one of:
a bone growth agent disposed in said blind opening; and
a plug operative to seal said blind opening.

17. The prosthetic implant of claim 16 , wherein said plug is at least one of a resorbable and a time-release plug.

18. The prosthetic implant of claim 16 , further comprising a second blind opening in said intermediate ring structure.

19. The prosthetic implant of claim 18 , further comprising at least one of:
a bone growth agent disposed in said second blind opening; and
a plug operative to seal said second blind opening.

20. The prosthetic implant of claim 10 , wherein said inner ring structure is coupled to said outer ring structure at a plurality of locations between a distal end of said inner ring structure and a proximal end of said inner ring structure.

21. The prosthetic implant of claim 10 , wherein said intermediate ring structure is coupled to said outer ring structure and to said inner ring structure at a plurality of locations between a distal end of said intermediate ring structure and a proximal end of said intermediate ring structure.

22. The prosthetic implant of claim 10 , wherein said central support member is disposed in said hollow body inward of said inner ring structure, and wherein said central support member is coupled to said inner ring structure at a plurality of locations at a distal end of said inner ring structure and a proximal end of said inner ring structure.

23. The prosthetic implant of claim 10 , further comprising a plurality of stiffening arms, wherein a number of said stiffening arms is selected to tune a stiffness of said stem to match the stiffness of human bone tissue.

24. The prosthetic implant of claim 23 , wherein a thickness of said stiffening arms is selected to tune a stiffness of said stem to match the stiffness of human bone tissue.

25. The prosthetic implant of claim 10 , further comprising a plurality of radial sections, wherein a number of said radial sections is selected to tune a stiffness of said stem to match the stiffness of human bone tissue.

26. The prosthetic implant of claim 10 , wherein said central support member is coupled to said outer ring structure at a plurality of locations at a distal end of said outer ring structure and a proximal end of said outer ring structure.

27. A prosthetic implant, comprising:
an interface portion operative to interface with an other structure; and
a stem coupled to said interface portion, wherein the stem is structured for implantation to a desired depth into a bone tissue, and wherein the stem includes:
a metallic body having a length corresponding to a desired depth of implantation, wherein said metallic body includes a core member extending at least a portion of said length corresponding to the desired depth of implantation; an outer ring structure formed integrally with said core member and having said length corresponding to the desired depth of implantation, wherein sa

Assignees

• Laughner Lisa M
• Withey Paul Anthony
• Schlienger Max Eric
• Pruitt Tim
• Rolls Royce Corp

Inventors

• Laughner Lisa M
• Withey Paul Anthony
• Schlienger Max Eric
• Pruitt Tim

Classifications

• A61F2002/30593

  hollow · CPC title

• C04B35/053

  Fine ceramics · CPC title

• A61F2002/3092

  having an open-celled or open-pored structure · CPC title

• C04B2235/6026

  Computer aided shaping, e.g. rapid prototyping · CPC title

• C04B35/486

  Fine ceramics · CPC title