Implant with arched bone contacting elements

• US 10,492,921 B2
• Filed: 10/25/2016
• Issued: 12/03/2019
• Est. Priority Date: 04/29/2015
• Status: Active Grant

• Current Assignee: The Institute of Musculoskeletal Science & Education
• Original Assignee: Institute For Musculoskeletal Science and Education Limited
• Inventors: McShane, III, Edward J., Stauffer, Megan A.
• Primary Examiner(s): Summitt, Lynnsy M
• Application Number:
  US15/334,053
• Publication Number:
  US 20170042697A1
• Time in Patent Office: 1,134 Days
• CPC Class Codes: A61F 2/30744 End caps, e.g. for closing an endoprosthetic cavity
• CPC Class Codes: A61F 2/30771 applied in original prostheses, e.g. holes or grooves
• 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 2002/30011 differing in porosity
• CPC Class Codes: A61F 2002/30289 helically-coiled
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30772 Apertures or holes, e.g. of circular cross section
• CPC Class Codes: A61F 2002/30774 internally-threaded
• CPC Class Codes: A61F 2002/3092 having an open-celled or open-pored structure
• CPC Class Codes: A61F 2002/30957 using a positive or a negative model, e.g. moulds
• CPC Class Codes: A61F 2002/30985 using three dimensional printing [3DP]
• CPC Class Codes: A61F 2002/4495 having a fabric structure, e.g. made from wires or fibres

Abstract

An implant that includes a body and a plurality of arched bone contacting elements is disclosed. The body includes a peripheral structure and three support beams extending in a central region of the peripheral structure. Arched bone contacting elements extend between adjacent beams and between beams and the peripheral structure. The arched bone contacting elements include flared legs. The arched bone contacting elements may be arranged in V-like configurations on the superior and inferior sides.

Claims

1. An implant, comprising:

a body including a peripheral structure bounding an interior region, and a first support beam extending through the interior region; and

a second support beam extending through the interior region;

a first arched bone contacting element having two ends and is attached to the first support beam; and

a second arched bone contacting element having two ends and is attached to the first support beam;

wherein the first arched bone contacting element includes an arched portion and at least one flared leg;

wherein the at least one flared leg includes a first portion attached to the body and a second portion proximate the arched portion; and

wherein the first portion has a first cross-sectional shape and wherein the second portion has a second cross-sectional shape that is different than the first portion cross-sectional shape; and

wherein the first cross-sectional shape is elliptic and the second cross-sectional shape is circular.

2. The implant according to claim 1, wherein the second arched bone contacting element includes an arched portion and at least one flared leg.

3. The implant according to claim 1, wherein the first arched bone contacting element includes a curved central axis, wherein a cross-sectional area of the first arched bone contacting element varies along the curved central axis;

and wherein the cross-sectional area is a minimum at the arched portion.

4. The implant according to claim 2, wherein the at least one flared leg of the second arched bone contacting element includes a first portion attached to the body and a second portion proximate the arched portion of the second arched bone contacting element;

and wherein the first portion of the second arched bone contacting element has a first cross-sectional shape and wherein the second portion has a second cross-sectional shape that is different than the first portion of the second arched bone contacting element.

5. The implant according to claim 4, wherein the first cross-sectional shape of the second arched bone contacting element is approximately elliptic and wherein the second cross-sectional shape of the second arched bone contacting element is approximately circular.

6. The implant according to claim 1, wherein the first portion of the at least one flared leg of the first arched bone contacting element is attached to a segment of the body extending along a first axis of the implant;

and wherein a longest dimension of the first portion is approximately aligned with the first axis.

7. The implant according to claim 1, wherein the first arched bone contacting element includes a distal surface region and wherein the distal surface region has a different curvature than an adjacent surface region of the arched portion.

8. The implant according to claim 1, wherein the first arched bone contacting element includes a roughened surface region.

9. The implant according to claim 1, wherein each arched bone contacting element is configured to direct bone growth from a superior or inferior surface of the implant towards an internal region of the implant.

10. An implant, comprising:

a body including a lateral axis, a posterior-anterior axis that extends perpendicular to the lateral axis, and a vertical axis that extends perpendicular to the lateral axis and the posterior-anterior axis;

the body including a peripheral structure bounding an interior region, and a first support beam extending through the interior region substantially parallel to the posterior-anterior axis;

a second support beam extending through the interior region substantially parallel to the posterior-anterior axis; and

a third support beam extending through the interior region substantially parallel to the posterior-anterior axis;

a first arched bone contacting element oriented at a first angle with respect to the lateral axis and a second arched bone contacting element oriented at a second angle with respect to the lateral axis; and

wherein the first angle is different from the second angle;

wherein the first arched bone contacting element and the second arched bone contacting element are arranged in a first V-like configuration on the body; and

wherein the first V-like configuration is centered around the second support beam.

11. The implant according to claim 10, wherein the first arched bone contacting element has a first end touching the second support beam and a second end touching the first support beam, and the second arched bone contacting element has a first end touching the second support beam and a second end touching the third support beam.

12. The implant according to claim 10, wherein:

the body has a posterior side and an anterior side;

the posterior-anterior axis extending from the posterior side to the anterior side and the lateral axis extending between a first lateral side and a second lateral side of the body;

the implant further including a third arched bone contacting element and a fourth arched bone contacting element arranged in a second V-like configuration on the body;

wherein the first V-like configuration and the second V-like configuration have different positions along the lateral axis.

13. The implant according to claim 12, wherein the third arched bone contacting element extends between the first lateral side of the implant to the first support beam and wherein the fourth arched bone contacting element extends between the first support beam and the second support beam.

14. The implant according to claim 10, wherein the implant includes a plurality of pairs of arched bone contacting elements, each of the pairs from the plurality of pairs being arranged in a plurality of V-like configurations.

15. The implant according to claim 14, wherein two V-like configurations of the plurality of V-like configurations are centered around the first support beam, wherein two other V-like configurations of the plurality of V-like configurations are centered around the third support beam, and wherein all of the V-like configurations of the plurality of V-like configurations are in contact with the second support beam.

16. An implant, comprising:

a body comprising a peripheral structure, a first support beam having a first end and a second end and a second support beam having a first end and a second end, the first support beam and the second support beam being approximately coplanar;

wherein the peripheral structure bounds an interior region and wherein the first support beam and the second support beam span the interior region such that the first end and the second end of the first support beam both touch the peripheral structure of the body and the first end and the second end of the second support beam both touch the peripheral structure of the body;

a first arched bone contacting element extending from a portion of the peripheral structure to an intermediate portion of the first support beam; and

a second arched bone contacting element extending from the first support beam to the second support beam.

17. The implant according to claim 16, wherein the first support beam is a straight beam and wherein the second support beam is a straight beam.

18. The implant according to claim 16, wherein the implant includes a third arched bone contacting element, and wherein the third arched bone contacting element includes a first end and a second end, and wherein the first end and the second end are attached to the first support beam.

19. The implant according to claim 16, wherein the implant includes a third arched bone contacting element, and wherein the third arched bone contacting element includes a first end and a second end, and wherein the first end and the second end are attached to a lateral side of the peripheral structure.

20. The implant according to claim 16, wherein the implant includes a third support beam spanning the interior region and wherein the first support beam, the second support beam and the third support beam are approximately coplanar.

21. The implant according to claim 16, wherein the first arched bone contacting element includes a convex bone contacting region.

22. The implant according to claim 16, wherein the first arched bone contacting element and the second arched bone contacting element are arranged in a V-like configuration on the body.

23. The implant according to claim 16, wherein the peripheral structure includes at least one attachment opening for engaging an insertion device.