VIDINHA, Vitor et al. Luxação volar do trapezóide. []. , 21, 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.

: Trapezoid; dislocation; fracture; carpal.

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