Implant for reconstructing an acetabulum and at least part of a pelvic structure

Patent metadata

Field	Value
Publication number	US-12440342-B2
Application number	US-202217811745-A
Country	US
Kind code	B2
Filing date	Jul 11, 2022
Priority date	Feb 16, 2016
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

The present invention provides an implant for reconstructing an acetabulum and at least part of a pelvic structure. To this end, the implant comprises a frame structure embodied by at least one first profile element for transferring joint forces, a joint section which forms at least part of an artificial acetabulum, at least two attachment sections for attaching the implant to bone tissue, wherein a first attachment section is provided for attachment to a sacral bone or iliac bone and a second attachment section is provided for attachment to a pubic bone, and at least one plate element for supporting internal organs, which is surrounded by the frame structure, at least in sections.

First claim

The invention claimed is:

1. An implant for reconstructing an acetabulum and at least part of a pelvic structure of a patient, said implant comprising:
a first frame structure embodied by at least one first profile element for transferring joint forces,
a second frame structure comprising at least one second profile element to replace at least part of an ischium, wherein each of the at least one profile elements have a continuously rounded cross-section,
a joint section, which forms at least part of an artificial acetabulum,
at least two attachment sections for attaching the implant to bone tissue, wherein a first attachment section is provided for attachment to a sacrum or ilium and a second attachment section is provided for attachment to a pubis, and
a first plate element for supporting internal organs, wherein a circumferential edge of the first plate element is surrounded by the first attachment section and the first profile element,
wherein the first attachment section is located along the circumferential edge of the first plate element and the second attachment section is located along circumferential edge of a second plate element, and
wherein the first profile element comprises a cross-section in a dimension perpendicular to the first plate element, wherein a thickness of the cross-section of the first profile element is at least double a thickness of the first plate element.

2. The implant according to claim 1 ,
wherein the second frame structure further comprises a second plate element, wherein a circumferential edge of the second plate element is surrounded by the second attachment section and the second profile element.

3. The implant according to claim 1 ,
wherein at least one attachment section of the at least two attachment sections comprises, at least in sections:
an osseointegrative bone contact surface; or
an osseoinductive bone contact surface.

4. The implant according to claim 1 ,
wherein the joint section comprises an approximately hemispherical recess, into which a universal socket with an articular surface can be inserted or which forms an articular surface.

5. The implant according to claim 1 ,
wherein both the first plate element and the second plate element abut the joint section.

6. The implant according to claim 1 ,
wherein two substantially curved profile elements are provided for transferring the joint forces from the joint section,
wherein the profile elements are each connected at one end to an attachment element and at a second end, opposite the one end, to the joint section, wherein the first and second end of each of the profile elements point in opposite directions.

7. The implant according to claim 3 , wherein the osseointegrative bone contact surface comprises a trabecular structure.

8. The implant according to claim 1 , wherein the first profile element is hollow in sections and solid in sections.

9. The implant according to claim 1 , wherein the second profile element comprises a cross-section in a dimension perpendicular to the second plate element, wherein a thickness of the cross-section of the second profile element is at least double a thickness of the second plate element.

10. The implant according to claim 1 , wherein one or both of the first profile element and the second profile element is a continuously hollow element.

11. An implant for reconstructing an acetabulum and at least part of a pelvic structure of a patient, said implant comprising:
a first frame structure embodied by at least one first profile element for transferring joint forces,
a second frame structure comprising at least one second profile element to replace at least part of an ischium, wherein each of the at least one profile elements have a continuously rounded cross-section,
a joint section, which forms at least part of an artificial acetabulum,
at least two attachment sections for attaching the implant to bone tissue, wherein a first attachment section is provided for attachment to a sacrum or ilium and a second attachment section is provided for attachment to a pubis, and
a first plate element for supporting internal organs, wherein a circumferential edge of the first plate element is surrounded by the first attachment section and the first profile element,
wherein the only contact between the first frame structure and the first attachment section is at the at least one profile element of the first frame structure, and wherein the only contact between the second frame structure and the second attachment section is at the at least one profile element of the second frame structure and
wherein the first profile element comprises a cross-section in a dimension perpendicular to the first plate element, wherein a thickness of the cross-section of the first profile element is at least double a thickness of the first plate element.

12. The implant according to claim 11 ,
wherein the second frame structure further comprises a second plate element, wherein a circumferential edge of the second plate element is surrounded by the second attachment section and the second profile element.

13. The implant according to claim 11 ,
wherein at least one attachment section of the at least two attachment sections comprises, at least in sections:
an osseointegrative bone contact surface; and/or
an osseoinductive bone contact surface.

14. The implant according to claim 11 ,
wherein the joint section comprises an approximately hemispherical recess, into which a universal socket with an articular surface can be inserted or which forms an articular surface.

15. The implant according to claim 11 ,
wherein two substantially curved profile elements are provided for transferring the joint forces from the joint section,
wherein the profile elements are each connected at one end to an attachment element and, at a second end opposite the one end, to the joint section, wherein the first and second end of each of the profile elements point in opposite directions.

16. The implant according to claim 13 , wherein the osseointegrative bone contact surface comprises a trabecular structure.

17. The implant according to claim 11 , wherein the first profile element is hollow in sections and solid in sections.

18. The implant according to claim 11 , further comprising a second plate element, wherein the second profile element comprises a cross-section in a dimension perpendicular to the second plate element, wherein a thickness of the cross-section of the second profile element is at least double a thickness of the second plate element.

19. The implant according to claim 11 , wherein one or both of the first profile element and the second profile element is a continuously hollow element.

Assignees

• Link Waldemar Gmbh Co

Inventors

• Link Helmut D

Classifications

• A61F2002/30985

  using three dimensional printing [3DP] · CPC title

• A61F2002/3097

  using laser · CPC title

• A61F2002/30433

  using additional screws, bolts, dowels, rivets or washers e.g. connecting screws · CPC title

• A61F2/30988

  Other joints not covered by any of the groups A61F2/32 - A61F2/4425 · CPC title

• A61F2/30942

  for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques · CPC title