Removable augment for medical implant

• US 9,408,699 B2
• Filed: 03/11/2014
• Issued: 08/09/2016
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: SMed TA/TD, LLC. (Sites Medical LLC)
• Original Assignee: SMed TA/TD, LLC. (Sites Medical LLC)
• Inventors: Stalcup, Gregory C., Knapp, Troy D.
• Primary Examiner(s): STEWART, JASON-DENNIS NEILKEN
• Application Number:
  US14/204,862
• Publication Number:
  US 20140277529A1
• Time in Patent Office: 882 Days
• US Class Current: 1/1
• CPC Class Codes: A61F 2/2846 Support means for bone substitute or for bone graft implants, e.g. membranes or plates for covering bone defects nets or sleeves applied to surface of endoprostheses A61F2/30907; bone plates A61B17/80; bone regeneration in dental surgery A61C8/0006
• CPC Class Codes: A61F 2/30734 Modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect
• CPC Class Codes: A61F 2/38 for elbows or knees
• CPC Class Codes: A61F 2/3859 Femoral components
• CPC Class Codes: A61F 2/389 Tibial components A61F2/3868 takes precedence
• CPC Class Codes: A61F 2002/30433 using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• CPC Class Codes: A61F 2002/30736 Augments or augmentation pieces, e.g. wedges or blocks for bridging a bone defect
• CPC Class Codes: A61F 2002/3092 having an open-celled or open-pored structure
• CPC Class Codes: A61F 2002/4619 for extraction
• CPC Class Codes: A61F 2310/00359 Bone or bony tissue

Abstract

An orthopaedic augment includes a porous material, which is removably attached to a medical implant. The porous material has a bone ingrowth surface for interfacing with an existing bone material and another surface for interfacing with the medical implant.

Claims

1. An orthopaedic augment, comprising a porous material removably attachable to an interface surface of a medical implant, said porous material having a bone ingrowth surface for interfacing with an existing bone material and another surface for interfacing with said medical implant, said medical implant including a post extending from said interface surface past said bone ingrowth surface of said porous material, said post having a solid exposed surface.

2. The orthopaedic augment according to claim 1, wherein said porous material is removably attached to said medical implant with at least one fastener.

3. The orthopaedic augment according to claim 2, wherein said fastener is formed from polyether ether ketone (PEEK).

4. The orthopaedic augment according to claim 2, said at least one fastener being configured to thread into an opening on said medical implant.

5. The orthopaedic augment according to claim 1, wherein said porous material is one of a polymer scaffold, allograft bone, autograft bone, and cuttable metal scaffold.

6. The orthopaedic augment according to claim 5, wherein said porous material is a polymer scaffold, said polymer scaffold being formed from polyether ether ketone (PEEK).

7. An orthopaedic implant, comprising:

a main body having an interface surface;

a porous augment removably attached to said interface surface of said main body, said porous augment having a bone ingrowth surface for interfacing with a bone material and another surface coupled with said main body; and

a post extending from said interface surface of said main body past said bone ingrowth surface of said porous augment, said post having a solid exposed surface.

8. The orthopaedic implant according to claim 7, wherein said porous material is removably attached to said main body with at least one fastener.

9. The orthopaedic implant according to claim 8, wherein said at least one fastener is formed from polyether ether ketone (PEEK).

10. The orthopaedic implant according to claim 7, said porous augment being formed from one of a polymer scaffold, allograft bone, autograft bone, and cuttable metal scaffold.

11. The orthopaedic implant according to claim 10, wherein said porous augment is a polymer scaffold, said polymer scaffold being formed from polyether ether ketone (PEEK).

12. The orthopaedic implant according to claim 7, wherein said main body includes a porous layer of material to which said other surface of said porous augment is coupled.

13. The orthopaedic implant according to claim 7, wherein said main body is one of a tibial tray and a femoral implant.

14. The orthopaedic implant according to claim 13, wherein said main body is a femoral implant and said porous augment is removably attached with said femoral implant using a post.

15. The orthopaedic implant according to claim 7, wherein said porous augment has at least two thicknesses.

16. The orthopaedic implant according to claim 15, wherein said porous augment has a first portion having a first thickness and a second portion adjacent said solid post, said second portion having a second thickness which is less than said first thickness of said first portion.