A implantable artificial substitute for the metacarpophalangeal (MCP) joint(s) of the hand (finger) which typically has been damaged by rheumatoid, degenerative, or traumatic arthritis. It consists of multiple components made of metal [e.g., cobalt-chrome (Co-Cr)] and/or plastic (e.g., polyethylene) with stems and articulating surfaces. Dedicated tools for implantation may be included.