A prosthesis system includes a first component having an outer surface, an inner surface, a first side and a second side, the first component configured to replace a first portion of a surface of a bone. A second component is configured to replace a second portion of the surface of the bone and a spacer is configured to be located adjacent to the first side of the first component and between the first component and the second component when the first component and the second component replace the first portion and second portion, respectively, of the surface of the bone.