Scapho-Trapezio-Trapezoid Arthrodesis.

Abstract

Scapho-trapezio-trapezoid (STT) arthrodesis is a relatively common procedure performed for severe STT arthritis, scapholunate instability and Kienböck's disease. Twenty-eight of 31 patients who had undergone this procedure were reviewed at a mean of 65 months following surgery (range 24 to 97 months). Four patients underwent wrist arthrodesis; two for failed STT fusion; and two for uncontrolled pain related to pre-existing carpal osteoarthritis. Ninety-two percent of patients who had a successful STT arthrodesis achieved good or excellent pain relief and 79% were satisfied with the results of surgery. Pain relief was best in patients with a pre-operative diagnosis of STT arthritis. Wrist range of motion and strength were well preserved. No patients developed isolated arthrosis in the radiocarpal, intercarpal or adjacent joints. STT provides excellent pain relief with an acceptable reduction in grip strength and range of motion. However, the benefits of this procedure must be balanced against the potentially serious postoperative complications and the possibility of arthrosis.