Current concepts in traumatic mallet finger management

Mallet finger deformities can be divided into tendinous deformities caused by tendon rupture and bony deformities caused by fracture. In many cases, conservative treatment is possible. The goal of treating traumatic mallet finger deformities is to accurately restore the ruptured tendon or fractured bone to its proper position, correct extension lag or flexion contracture, prevent joint arthritis, and restore the full range of motion through appropriate range of motion exercises at the right time. In cases of tendinous mallet finger, immobilization with a splint or cast for at least 6 weeks in the extended position is required. During this period, flexion at the distal interphalangeal joint should be strictly limited, while movement at the proximal interphalangeal joint is allowed. Patient compliance with the protocol is essential for achieving good treatment outcomes. If conservative treatment fails or if the deformity recurs after initial surgery, satisfactory results can be achieved through tenodermodesis surgery. If the bony mallet finger involves a bone fragment of 3 mm or more or subluxation of the distal phalanx, surgical treatment is recommended. The primary surgical treatment involves closed reduction and percutaneous pinning with the extension block technique.