and your thumb has two. The knuckles are called the metacarpophalangeal (MCP) joints, proximal interphalangeal (PIP) joints, ...
OA often affects the joint connecting the thumb and wrist, the fingertips (DIP joints), and the middle knuckles (PIP joints .
Proximal interphalangeal (PIP ... of finger joint implants have also been a topic of interest. A study from the Norwegian Arthroplasty Register reported a 94% survival rate for metacarpophalangeal ...