Resumo

VIDINHA, Vitor et al. Luxação volar do trapezóide. Rev. Port. Ortop. Traum. [online]. 2013, vol.21, n.1, pp.91-95. ISSN 1646-2122.

Aim: the highly congruent joint surface and the strong structure of the trapezoid ligaments provide great stability and dislocation of this bone is rare. The authors present the case of a palmar dislocation of the trapezoid (less frequent than the dorsal dislocation), and review aspects to be taken into account during diagnosis and treatment. Description: a young polytrauma patient with a complex carpal injury (dislocation of the trapezoid associated with hamate and capitate fractures and trapezium-metacarpal fracture-dislocation). Open reduction and fixation of the carpal injuries was done by a dorsal approach. Thirty months after surgery there was a normal range of motion with a painless wrist. No radiographic signs of instability or degenerative changes were present. Comment: there are few publications of trapezoid dislocations which are mostly dorsal. The knowledge of its possibility and correct radiographic evaluation prevents delayed diagnosis. The dorsal open reduction is associated with a better prognosis. Excision appears to be associated with the development of degenerative changes of the carpus. The preservation of soft tissues during surgical approach can decrease the risk of osteonecrosis.

Palavras-chave : Trapezoid; dislocation; fracture; carpal.

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