Abstract
Isolated trapezium fracture in combination with thumb carpometacarpal (CMC) joint dislocation is extremely rare, and no treatment consensus exists. Herein, we report 3 successfully treated cases of isolated trapezium fracture with thumb CMC joint dislocation. While good short-term results have been reported in the literature, the possibility of substantial ligament injuries that can lead to future instability of the thumb CMC joint must be noted. In order to obtain an excellent long-term clinical result, we propose the consideration of the anatomical repair of the CMC joint in terms of both bony and ligamentous structures in cases where instability remains after fracture fixation.
Highlights
Isolated fractures of the trapezium are rare injuries that account for 3–5% of all carpal fractures [1]
Given that isolated trapezium fracture and thumb CMC joint dislocation are rare injuries [1, 2], the combination is extremely rare, with only 14 cases reported in the English literature [3,4,5,6,7,8,9,10,11,12,13,14,15]
The fracture pattern of case 1 was type V, and the fracture patterns of cases 2 and 3 were type IV. e mechanism underlying thumb CMC dislocation associated with isolated trapezium fracture is still controversial
Summary
Isolated fractures of the trapezium are rare injuries that account for 3–5% of all carpal fractures [1]. Pure carpometacarpal (CMC) dislocations of the thumb are rare, accounting for less than 1% of all hand injuries [2]. We report 3 cases of isolated trapezium fracture with thumb CMC joint dislocation. Good short-term results were obtained; long-term complications must be noted. Optimal treatment for the injury considering the anatomical features of the thumb CMC joint is discussed
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