Implant With Bone Contacting Elements Having Helical And Undulating Planar Geometries

• US 20180256352A1
• Filed: 03/13/2017
• Published: 09/13/2018
• Est. Priority Date: 03/13/2017
• Status: Active Grant

• Current Assignee: The Institute of Musculoskeletal Science & Education
• Original Assignee: Institute For Musculoskeletal Science and Education Limited
• Inventors: Nyahay, Joseph M., McShane, III, Edward J., Bishop, Sean S., Ryan, Christopher J., Stauffer, Megan A.
• Granted Patent: US 10,357,377 B2
• Time in Patent Office: Days
• CPC Class Codes: A61F 2/4455 for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages intervertebral discs A61F2/442
• CPC Class Codes: A61F 2/447 substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2002/30112 Rounded shapes, e.g. with rounded corners
• CPC Class Codes: A61F 2002/30136 undulated or wavy, e.g. serpentine-shaped or zigzag-shaped
• CPC Class Codes: A61F 2002/30153 rectangular
• CPC Class Codes: A61F 2002/30289 helically-coiled
• CPC Class Codes: A61F 2002/30291 spirally-coiled, i.e. having a 2D spiral cross-section
• CPC Class Codes: A61F 2002/3092 having an open-celled or open-pored structure
• CPC Class Codes: A61F 2002/3093 for promoting ingrowth of bone tissue
• CPC Class Codes: A61F 2002/4495 having a fabric structure, e.g. made from wires or fibres
• CPC Class Codes: A61F 2002/4629 connected to the endoprosthesis or implant via a threaded connection

Abstract

An implant includes a first body member and a second body member connected by a plurality of bone contacting elements. Some of the bone contacting elements may have a generally helical geometry. Some of the bone contacting elements may have an undulating planar geometry. The bone contacting elements may have a rounded cross-sectional shape or a rectangular cross-sectional shape.

Claims

1. An implant, comprising:

a first body member and a second body member;

a first bone contacting element having a first sidewall;

a second bone contacting element having a second sidewall;

the first bone contacting element extending from the first body member to the second body member;

the second bone contacting element extending from the first body member to the second body member; and

wherein the first sidewall of the first bone contacting element is attached to the second sidewall of the second bone contacting element at a connecting portion.

2. The implant according to claim 1, wherein the first bone contacting element is tangential to the second bone contacting element at the connecting portion.

3. The implant according to claim 1, wherein the first bone contacting element has a generally helical geometry.

4. The implant according to claim 3, wherein the second bone contacting element has a generally helical geometry.

5. The implant according to claim 3, wherein the second bone contacting element has an undulating planar geometry.

6. The implant according to claim 4, wherein the first bone contacting element and the second bone contacting element are located adjacent to a median plane of the implant.

7. The implant according to claim 4, wherein the first bone contacting element has a larger winding diameter than the second bone contacting element.

8. The implant according to claim 1, wherein:

the implant includes an inferior side and a superior side;

wherein the implant includes at least six bone contacting elements having a generally helical geometry on the superior side;

wherein the implant includes at least six bone contacting elements having a generally helical geometry on the inferior side; and

wherein each of the bone contacting elements on the superior side and the inferior side extend from the first body member to the second body member.

9. The implant according to claim 1, wherein:

the first body member is disposed at an anterior end of the implant and wherein the second body member is disposed at a posterior end of the implant.

10. An implant, comprising:

a first body member and a second body member;

a bone contacting element extending from the first body member to the second body member; and

wherein the bone contacting element has an undulating planar geometry.

11. The implant according to claim 10, wherein the implant includes at least one bone contacting element with a generally helical geometry.

12. The implant according to claim 10, wherein the bone contacting element intersects a transverse plane of the implant.

13. The implant according to claim 10, wherein the bone contacting element is disposed between a first generally helical bone contacting element and a second generally helical bone contacting element.

14. The implant according to claim 10, wherein the bone contacting element has a circular cross-sectional shape.

15. The implant according to claim 10, wherein the bone contacting element has a rectangular cross-sectional shape.

16. The implant according to claim 10, wherein a center curve of the bone contacting element has the undulating planar geometry.

17. The implant according to claim 10, wherein an exterior surface curve of the bone contacting element has the undulating planar geometry.

18. An implant, comprising:

a superior side, an inferior side and a lateral side;

a first body member and a second body member;

a first bone contacting element extending from the first body member to the second body member, the first bone contacting element being disposed adjacent a location where the lateral side meets the superior side;

a second bone contacting element extending from the first body member to the second body member, the second bone contacting element being disposed adjacent a location where the lateral side meets the inferior side;

a support wall extending on the lateral side between the first bone contacting element and the second bone contacting element; and

a third bone contacting element intersecting the support wall.

19. The implant according to claim 18, wherein the third bone contacting element has an undulating planar geometry.

20. The implant according to claim 19, wherein the intersection of the third bone contacting element with the support wall forms a first raised bone contacting region and a second raised bone contacting region on the lateral side between the first bone contacting element and the second bone contacting element.

21. An implant, comprising:

a first body member and a second body member;

a first direction extending from the first body member to the second body member and a second direction perpendicular to the first direction;

a central bone contacting element generally extending along the second direction; and

wherein the central bone contacting element has an undulating planar geometry.

22. The implant according to claim 21, wherein the first body member is located on an anterior side of the implant, and wherein the second body member is located on a posterior side of the implant.

23. The implant according to claim 21, wherein the implant includes a first peripheral bone contacting element extending from the first body member to the second body member on a first lateral side of the implant.

24. The implant according to claim 23, wherein the implant includes a second bone contacting element extending from the first body member to the second body member on a second lateral side of the implant.

25. The implant according to claim 24, wherein the central bone contacting element extends from the first peripheral bone contacting element to the second peripheral bone contacting element.

26. The implant according to claim 25, wherein the first peripheral bone contacting element has an undulating planar geometry.

27. The implant according to claim 21, wherein the implant includes a superior bone contacting element extending from the first body member to the second body member and wherein the superior bone contacting element is attached to the central bone contacting element.

28. The implant according to claim 27, wherein the superior bone contacting element has a generalized helical geometry.

29. The implant according to claim 28, wherein a portion of the superior bone contacting element is aligned with a portion of the central bone contacting element.