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  • Title: Long-term outcome of distal ulna resection-stabilisation procedures in post-traumatic radio-ulnar joint disorders.
    Author: Mansat P, Ayel JE, Bonnevialle N, Rongières M, Mansat M, Bonnevialle P.
    Journal: Orthop Traumatol Surg Res; 2010 May; 96(3):216-21. PubMed ID: 20488138.
    Abstract:
    INTRODUCTION: Distal radius fractures represent 20% of fractures in adults. Although good results are usually obtained with treatment, functional sequelae are not uncommon, with injury of the distal radio-ulnar joint (DRUJ) being the most frequent. Various treatments have been described to address these disorders. Distal ulna resection-stabilisation (DURS) is our technique of choice when preservation of the DRUJ is impossible. PATIENTS AND METHOD: Twenty patients operated between 1985 and 1996 were reviewed with minimum 6-year follow-up. Nine of them were men and 11 were women, with an average age 45 years. The initial trauma was a distal radius fracture in all cases. The main complaint was ulnar pain with no limitation of mobility in five patients, painful limitation of prono-supination in 14, and palmar subluxation of the ulna in one case. Radiographic evaluation and CT scan showed DRUJ incongruence in 14 patients with ulna head instability, and ulno-carpal abutment with degenerative changes at the DRUJ in six cases. In three patients, malunion of the distal radius was associated with degenerative DRUJ lesions. RESULTS: The satisfaction rate was 95% at an average follow-up of 11 years (range 6.7 to 18.6 years). Pain scores decreased progressively from 2.2 to 0.5 post-operatively. Range of motion improved in supination from 37 degrees to 80 degrees , and in pronation from 66 degrees to 84 degrees . Improvements were 15 degrees in ulnar inclination, 9 degrees in radial inclination, 16 degrees in flexion, and 23 degrees in extension. Distal ulna palpation was not painful, and no instability was observed on movement. Wrist strength was equivalent to 80.8% of the healthy contra-lateral side. Radiographic results showed no anomaly of the resected ulna, no sign of abutment on the radius and no ulnar translation of the carpus at follow-up. Only one patient, who presented algoneurodystrophic syndrome after the initial trauma, had a recurrence after DURS. DISCUSSION-CONCLUSION: DRUJ injuries are frequent in the context of wrist trauma. If not well-treated, they could lead to significant functional sequelae of the wrist. Radiographic evaluation should clarify the status of the DRUJ to choose between conservative or radical surgical treatment. If the DRUJ surfaces are preserved, conservative treatment, which consists of correcting the distal radius malunion and stabilising or shortening the ulna, is the treatment of choice. When the DRUJ surfaces are injured, DURS is our treatment of choice. This approach presents a low complication rate and more than 90% of satisfactory results, often with a pain-free wrist, functional range of motion and good strength. However, a rigorous technique, with limited ulna head resection, dorsal capsuloplasty, reconstruction of the extensor retinaculum and dorsal placement of the extensor carpi ulnaris tendon, is a prerequisite for success. LEVEL OF EVIDENCE: Level IV retrospective therapeutic study.
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