Blade fixation for ankle fusion and arthroplasty

摘要

Systems for lower extremity fusion and arthroplasty include fusion spacers, bone plates, and articular prostheses fixed to bone by blade anchors. Examples are shown for anterior, lateral, and medial approaches.

主权项

1. A system comprising:
a first implant body comprising a first bone-contacting surface and a first channel on the first bone-contacting surface, wherein the first channel comprises a first undercut keyway; and a first anchor coupled to the first implant body, the first anchor comprising a first bone fixation feature carried outside the first implant body, a first connecting feature extending along a length of the first anchor and fixed in the first channel, and a first intermediate portion connecting the first bone fixation feature to the first connecting feature and extending through the first bone-contacting surface, wherein the first intermediate portion comprises a front intermediate portion and a rear intermediate portion separate from and spaced apart from the front intermediate portion along the length of the first anchor, wherein the first connecting feature is interrupted along the length of the first anchor so that the first connecting feature is discontinuous between the front intermediate portion and the rear intermediate portion; wherein the first channel and the first connecting feature have complementary interconnecting shapes, wherein the first connecting feature slidingly engages the first channel to couple the first anchor to the first implant body.