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Arthroscopic reduction and percutaneous fixation of perilunate dislocations and fracture-dislocations.

Arthroscopy 2012 Februrary
PURPOSE: The purpose of this study was to review clinical and radiographic outcomes of perilunate dislocations and fracture-dislocations treated with arthroscopic reduction and percutaneous fixation.

METHODS: Twenty patients who had an acute dorsal perilunate dislocation or fracture-dislocation were treated with an arthroscopic technique at a median interval of 3.9 days from the time of injury. They were retrospectively reviewed at a mean follow-up of 31.2 months (range, 18 to 61 months). Range of motion and grip strength were measured. Radiographic evaluations included time to scaphoid union, measurement of radiologic parameters, and any development of arthritis. Functional outcomes were determined by the modified Mayo wrist score; Disabilities of the Arm, Shoulder and Hand questionnaire; and Patient-Rated Wrist Evaluation score.

RESULTS: The flexion-extension motion arc and grip strength of the injured wrist averaged 79% and 78%, respectively, of the corresponding values for the contralateral wrists. The mean Disabilities of the Arm, Shoulder and Hand score was 18, and the mean Patient-Rated Wrist Evaluation score was 30. According to modified Mayo wrist scores, overall functional outcomes were rated as excellent in 3 patients, good in 8, fair in 7, and poor in 2. Nonunion developed in 2 patients with a trans-scaphoid perilunate injury; 1 of the 2 underwent scaphoid excision and midcarpal fusion. On the basis of radiographic parameters, reduction obtained during the operation was maintained within normal ranges in 15 patients. Arthritis had not developed in any patient by the last follow-up.

CONCLUSIONS: This study suggests that arthroscopic reduction with percutaneous fixation is a reliable minimally invasive surgical method for acute perilunate injuries in that it provides proper restoration and stable fixation of carpal alignment and results in satisfactory functional and radiologic outcomes on a midterm basis.

LEVEL OF EVIDENCE: Level IV, therapeutic case series.

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