The base of the thumb or carpometacarpal (CMC) joint is a frequent site of pain and deformity from arthritis. The goal of surgery is to relieve pain and restore strength and stability. There are many ways to accomplish this with surgery.

Suspensionplasty uses the abductor pollicis longus (APL) tendon to hold the main bone of the thumb (metacarpal) in place after removing the painful, arthritic bone (trapezium) at the base of the thumb.

The surgeon does this by drilling a tunnel through the metacarpal bones of the thumb and the index finger. The APL is threaded through these two tunnels and stitched in place.

The main problem after this operation is called subsidence. The thumb metacarpal can sink down into the space left by the missing bone. The "suspension" doesn't hold it in place as hoped. This may not cause problems at first but over time, pain and loss of function may require a second (revision) surgery.

A few patients who've had this operation report some weakness when opening jars or turning keys in locks. They also report mild discomfort or pain but most say they are much better than before the operation.