Transacromial Knowles pin in the treatment of Neer type 2 distal clavicle fracturesA prospective evaluation of 32 cases

Abstract

Background: The high rate of non-union makes surgical intervention necessary for a distal clavicle fracture. This report presents the outcome of a simple surgical method using a transacrominal Knowles pin for this unstable fracture.

Methods: In this study, 32 patients with Neer type 2 distal clavicle fractures were treated using a single transacromial Knowles pin without repair of the torn ligament. All 32 patients were studied prospectively and followed up for a mean of 80 months (range, 12-132 months). The clinical outcome was evaluated with the UCLA score, and the fracture union was judged roentgenographically.

Results: All the patients showed excellent results with solid union. The mean union time was 6.8 weeks (range, 4-12 weeks). No major complication was noted, and only one asymptomatic acromioclavicular arthrosis developed.

Conclusions: Single transacrominal Knowles pin fixation offers a simple and safe method for treating patients with displaced Neer type 2 distal clavicle fractures.