The finger joint surfaces are formed by the proximal phalanx and metacarpal bones. The surfaces are covered by cartilage.

Certain conditions may indicate the need for a replacement for a finger joint such as: osteoarthritis (shown), persistent pain, severe loss of function, and certain types of fractures.

A replacement joint can help alleviate pain and improve function. The replacement joint usually has two parts that replace the joint surfaces and is made of a combination of metal and plastic.

Figure 1: Comparison of a normal finger joint and a replacement finger joint.
Figure 2: Normal finger joint.
Figure 3: A damaged finger joint.
Figure 4: Replacement finger joint.