The American journal of orthopedics
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Rupture of the extensor pollicis longus (EPL) tendon after nondisplaced fracture of the distal radius is a known complication, but can also occur in nonrheumatoid patients without a history of fracture. This study is a retrospective analysis of seven patients treated between 1985 and 1992. Five EPL ruptures occurred with nondisplaced Colles' fractures. ⋯ The causes of EPL rupture include mechanical irritation, attrition, and vascular impairment leading to delayed rupture. Synovitis of the extensor carpi radialis due to repetitive use may invade the EPL tendon and lead to rupture. Extensor indicis proprius transfer or free palmaris longus grafts yield good results after EPL rupture.