The present invention contemplates an implant for insertion in various bones of the human foot and ankle to repair injuries and deformities. In one preferred embodiment the implant device includes a trapezoidal body member when viewed from the top with substantially vertical sidewalls consisting of at least two intersecting sidewalls that define a head end having a head-height. The sidewalls diverge at their respective tail ends to define a concave shape and a tail-height that is substantially the same as the head height, thus giving the implant a top and bottom that are substantially parallel when viewed from the front, side, or back views. The top and bottom portions further include friction-enhancing serrations.
