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Scaphoid nonunion and flexor pollicis longus tendon rupture
Authors:Saitoh S  Hata Y  Murakami N  Nakatsuchi Y  Seki H  Takaoka K
Affiliation:Department of Orthopaedics, Shinshu University School of Medicine, Asahi, Matsumoto City, Japan.
Abstract:Four patients presented with a rupture of the flexor pollicis longus tendon that was associated with a longstanding scaphoid nonunion. A radiocarpal arthrosis was present in 3 of the 4 patients and a dorsiflexed intercalated segment instability deformity was also seen in 3 of the 4 patients. Three patients underwent surgery consisting of an osteosynthesis with an iliac bone graft for the scaphoid nonunion and a palmaris longus tendon graft for the ruptured flexor pollicis longus tendon. An osseous union of the scaphoid and a functional active range of motion of the thumb interphalangeal joint (33 degrees on average) was attained in all 3 of the patients treated surgically. Preoperative radiologic examinations and intraoperative findings suggest that the volarly protruding distal scaphoid segment is the cause of the rupture.
Keywords:Scaphoid nonunion   flexor pollicis longus tendon   magnetic resonance imaging   anterior interosseous nerve palsy
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