Talonavicular joint prosthesis and method of implanting the prosthesis

A method of implanting a talonavicular joint prosthesis in a navicular bone and a talus bone, the method comprising:

• establishing a central axis based on a radius of curvature of the navicular bone in a dorsal view and a width for articulation of the navicular bone, wherein establishing the central axis comprises defining at least two arcs from the radius of curvature within the width for articulation and defining a point where the arcs intersect as being on the central axis;
• aligning at least a portion of a guide with the central axis;
• preparing the navicular bone and the talus bone using at least one cutting device and the guide to guide movement of the at least one cutting device;
• and
• placing a navicular component in the prepared navicular bone and a talar component in the prepared talus bone.