SURGICAL TREATMENT OF DISTAL RADIAL FRACTURES. COMPARISON BETWEEN CLOSED REDUCTION AN EXTERNAL FIXATION VERSUS OPEN REDUCTION AND INTERNAL FIXATION. A RANDOMIZED STUDY.

Abstract

Background: Distal radius fractures are among the most common fractures, consisting of about 1/6 of all fractures shoving up at the ER. Many times surgical treatment is indicated. However which type of operation to chose is not known. The standard operative treatment has been external fixation but more modern techniques for internal fixation have become increasingly popular. Our aim was to evaluate if internal fixation is beneficial for the patients. To do this we did this randomized study.

Material and methods: Between May 2002 and March 2005 a randomized study between closed reduction and external fixation versus open reduction and internal fixation with the TriMed® system was performed in 42 consecutive patients. 29 were women and 13 were men in the ages between 20 and 63 with a mean age of 48 years. 20 were randomized to closed treatment and 22 to open treatment. Patients were followed with clinical examination, radiographs, examination of range of movement and grip strength and outcome measured by DASH for one year.

Results: DASH-scores showed no statistical significant differences between the groups neither early at seven weeks (32 in the open group an 29 in the closed) nor late at one year (9 vs. 13) postoperatively. Range of movement in flexion and extension was better in the internal fixation group at 5 weeks (45 degrees vs. 67) degrees postoperatively but this difference disappeared at one year (121d egrees in both groups). Grip strength was significantly better for the TriMed group at 5 weeks (32% of the opposite side vs. 8% in the external fixation group) and 7 weeks (47% vs. 34%) and at one year (78% vs. 90%) postop. Range of movement in forearm rotation was significantly better in the open group during the whole follow up (126deg. vs. 101deg. at seven weeks and 149 vs. 133 at one year). There were three cases of redislocation in the external fixation group. They were all later treated with osteotomy. However there were 15 cases of minor complications in the open group compared to 9 cases in the closed group. The minor complications were mainly consisting of transient tingling of the radial nerve in the open group and skin adherences in the closed group.

Conclusion: Open reduction and internal fixation for distal radial fractures give better result regarding motion and grip strength than External fixation but there is no difference in subjective outcome. Complications are common in both groups but these are often minor non lasting complications. However malunion is more common with external fixation.