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Failure of this procedure leads to bipartite sesamoid bones 4. The most frequent mechanism of injury is a violent hyperextension of the pollex 2, 6, 7. A fracture may be caused also by a violent abduction of the thumb 6 and less frequently from direct trauma 3. In our case the injury was the result of a violent abduction of the pollex.
2 Οκτ 2014 · Anteroposterior and lateral radiographs may help in identifying fractures, but an oblique view of the thumb is best for diagnosing a sesamoid fracture. 4,11 Treatment of fracture of the sesamoid bone of the thumb is usually 2–4 weeks of immobilization with the MCP joint in slight flexion. 4
The pooled rates of the sensitive meta-analyses from large-sample studies in adults showed: (a) true overall rates of 99.9% for the metacarpophalangeal (MCP) joint of the thumb (MCP-I), 53%...
Sesamoid fractures of the metacarpophalangeal joint of the thumb may be classified into two types: (1) with palmar plate intact, and (2) with palmar plate ruptured.
31 Οκτ 2018 · Radiographs were available in 9 patients: possible fracture of a sesamoid was reported in 1. Ultrasound showed an irregular shape, focal interruption of the bone, and avulsed fragments. In 4 patients, the diagnosis was confirmed by computed tomography.
1 Ιουλ 2007 · Fracture of sesamoid bones of the thumb is a rare injury, not usually diagnosed, but it has good prognosis when treated properly, and follow up of the patient six weeks and six months after the injury demonstrated a total recovery of the function of the pollex and callousness of the fracture.
We report a case of such a fracture after hyperextension of the thumb in a 26-year-old woman. After a volar plate injury was excluded, she was treated nonoperatively with 5 weeks of immobilization followed by physical therapy.
