Abstract: An implantable device includes a prosthetic, an anchor having an outer surface forming a threaded structure, and a retainer securing the anchor to the prosthetic, the retainer limiting the relative movement between the anchor and the prosthetic to rotation of the anchor relative to the prosthetic. A method of repairing the first metatarsophalangealjoint includes cutting away a portion of the tissue of the proximal phalanx to form a cavity, driving an anchor of the implantable device into the cavity to anchor the implantable device to the proximal phalanx, and while the anchor is being driven into the cavity, aligning a prosthetic of the implantable device to the phalanx such that the alignment of the prosthetic is maintained.