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FUNCTIONAL OUTCOME AND STRENGTH FOLLOWING PLATE FIXATION OF FRACTURES OF BOTH BONES OF THE FOREARM IN ADULTS



Abstract

Introduction and Aims: Patient-based functional outcome and strength following plate fixation of diaphyseal fractures of the radius and ulna is unknown. Therefore, the purpose of this study was to investigate patient-based functional outcome and objectively measured strength following plate fixation of fractures of both bones of the forearm (BBOF).

Method: Twenty-five subjects (M/F 19/6, mean age 47.6 (range 20–71) treated with plate fixation for fractures of BBOF were clinically and radiographically reviewed. Mean duration of follow-up was 5.7 years (range 2–13.4 years). Post-operative protocol included short-term immobilisation followed by active-assisted ROM and strengthening starting between four and six weeks. All subjects were assessed in person at follow-up with a detailed examination of strength of their injured and non-injured arms. Isometric muscle strength was objectively measured with the Baltimore Therapeutic Equipment work simulator (model WS-20). Standardised anteroposterior and lateral radiographs were made of both forearms.

Results: Strength of elbow flexion (72% of non-injured arm, p< 0.0001), elbow extension (84%, p=0.0004), forearm supination (75%, p=0.005), forearm pronation (69%, p< 0.0001), wrist flexion (81%, p=0.009), wrist extension (62%, p< 0.0001) and grip (70%, p< 0.0001) were all significantly reduced in the injured arm. Mean (+/− SE) DASH and Gartland-Werley scores were 19.5 +/− 4.0 (range 0–61) and 4.04 +/− 0.91 (range 0–15) respectively. Eighty-eight percent (22/25) scored good to excellent on the Gartland-Werley scale. No statistical difference in mean maximal radial bow (MRB) between injured and non-injured arm was found (mean +/− SE, 1.42 +/− 0.07 vs 1.58 +/− 0.05 respectively) or in location of MRB (61% vs 59%).

Conclusion: Restoration of anatomic alignment with stable internal fixation following BBOF fracture results in good to excellent functional outcome. Despite this, significant reduction in strength of the elbow, forearm, wrist and grip should be expected following this injury, and is an area for potential improvement in post-operative care.

These abstracts were prepared by Editorial Secretary, George Sikorski. Correspondence should be addressed to Australian Orthopaedic Association, Ground Floor, The William Bland Centre, 229 Macquarie Street, Sydney, NSW 2000, Australia.

One or more of the listed authors are receiving or have received benefits or support from a recognised academic body for the pursuance of the study.