Can joint replacement be done on fingers?

Yes could be done: Many joint replacement done on the finger joints.

Finger joint pain: Finger joints such s the mcp ( big knuckle) the pip ( next joint down can be replaced though commonly for the pip joint border digints are arthrodesed or fused. Distal joint ( near the nail) are more communal fused as well. The thumb joint at the base typically has some form or excisional joint arthroplasty or a fusion depening upon several factors.