Abstract
Isolated dislocations of carpal bones are probably the most infrequent types of dislocations of the wrist. However, all the carpal bones have been reported to dislocate in an isolated fashion. Apart from the lunate, although rare, the most commonly dislocated carpal bone is the scaphoid. Regarding the scaphoid, the types of its dislocation are analyzed, the essential ligamentous injuries are considered and the mechanism of injury is studied. The diagnosis of all dislocated carpal bones is frequently delayed, due to lack of awareness of this rare occurrence. Excision of the dislocated carpal bone is not a recommended treatment option, with the exception of the pisiform. Although transient radiological features of early avascular changes have been reported, permanent avascular necrosis with fragmentation of the dislocated bone is extremely rare, with the trapezoid being the most frequently reported. The proposed treatment options for each dislocated bone are studied. Finally, cases reported in the literature of pairs of dislocated wrist bones, the most frequent of which is the scaphoid and lunate, are also examined.
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Apergis, E. (2013). Isolated Dislocations of the Carpal Bones. In: Fracture-Dislocations of the Wrist. Springer, Milano. https://doi.org/10.1007/978-88-470-5328-1_11
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