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VOLAR LOCKING PLATES: AN ASSESSMENT OF THEIR ABILITY TO MAINTAIN REDUCTION WHEN USED IN DISTAL RADIAL FRACTURES



Abstract

Aim: To assess the ability of volar locking plates to maintain fracture reduction when used to treat dorsally displaced extra and intra-articular distal radial fractures.

Methods: This prospective study was conducted over a 12 month period. Consenting patients who had sustained a closed, dorsally displaced distal radial fracture, treated by open reduction and internal fixation using a volar distal radial locking plate, were included in the study. Radial inclination, volar tilt and ulnar variance were measured from radiographs taken at least 3 months after surgery and compared with radiographs of the uninjured side. Only two of the eight participating surgeons have a specialist interest in upper limb surgery.

Results: Thirty-three patients were included in the study. There were 23 females and 10 males. The mean age was 49.5 years, range 26–82 years. According to the OTA classification there were 19 Type A, 1 Type B and 13 Type C fractures. The mean restoration of volar tilt was 1° of under-correction, median 1.1° under-correction with a range of 7.3° of under-correction to 3.7° of over-correction, when compared with the uninjured side. The mean restoration of radial inclination was 1.9° of under-correction, median 1.6° under-correction with a range of 10° of under-correction to 8.4° of over-correction. As a group the mean ulnar variance was 0mm with a range of 2mm of relative ulnar shortening to 3.5mm of ulnar prominence when compared with the uninjured side.

Conclusion: In the hands of general trauma surgeons, the volar approach combined with the application of a suitable volar locking plate is a good treatment for restoring and maintaining the anatomy of dorsally displaced intra and extra-articular distal radial fractures.

Correspondence should be addressed to Ms Larissa Welti, Scientific Secretary, EFORT Central Office, Technoparkstrasse 1, CH-8005 Zürich, Switzerland