PAPER 121: NON-BRIDGING EXTERNAL FIXATOR FOR UNSTABLE DISTAL RADIUS FRACTURE. A PROSPECTIVE RANDOMIZED STUDY

Abstract

Purpose: The main treatment for unstable distal radius fracture in Québec consists in pinning and cast, with secondary shortening and displacement responsible for lack of motion. The goal of the study is to compare clinical and radiological results after treatment with non-bridging external fixator compared to pinning and cast, with restoration of grip strength as main clinical outcome.

Method: Between June 2003 and June 2005, 120 consecutive patients admitted for unstable extra-articular distal radius fracture were randomized in the 2 groups. Early mobilisation was allowed in the group with external fixator, and patients in the other group had pins and cast for 6 weeks. Follow-up was completed after 6 months with determination of clinical and radiological data for the both wrists. 110 patients completed the study, with 2 comparative groups for epidemiologic and radiological criteria (n = 63 for pins and 57 for external fixator).

Results: Grip strength was significantly better in the fixator group at 3 months (68,36%;p< 0,001) and 6 months (98,26%;p< 0,001). Active ROM was better and obtained earlier in the fixator group in all directions (p< 0,001). Fixator prevent shortening and secondary displacement in a highly significant way (p< 0,001). No difference in pain medication, but fixator group could begin occupation earlier (p< 0,001).

Conclusion: Non-bridging external fixator is a treatment of choice for unstable extra-articular distal radius fractures. The immediate stability allows in all patients (without influence of age, bone quality or fracture displacement) early mobilisation, prevent secondary displacement, and gives earlier and better functional results.