---

Introduction: Distal radius fracture is one of the most common traumatic injuries of all ages. The majority of the complications are related to intra-articular fracture. Among the main treatments, one can name closed reduction and percutaneous pin fixation. The present study aimed to compare the complications and outcomes of using these treatments in patients with unstable distal radius fractures.
 
Materials & Methods: This prospective randomized clinical trial was conducted on patients between the ages of 18 and 65 with closed and intra-articular fractures of the distal radius who referred to Shahid Beheshti Hospital, Babol, Iran, during spring 2014 and summer 2015. It should be noted that the patients were candidates for fixation surgery, and they were randomly assigned into two groups (n=25) based on the type of fracture, age, and gender. Subsequently, group 1 underwent surgery using 4 pin Trans radioulnar and group 2 was treated with a three cross pin method. The radial length and inclination,Volar tilt, and Ulnar Variance were determined and compared after surgery and at 6, 12, and 24 weeks post-surgery. Ethics code: MUBABOL.HRI.REC.1394.125. Clinical Trial: IRCT2016112727797N1.
 
Findings: There was no significant difference between the two groups regarding radiographic changes. Moreover, no significant difference was observed between the studied variables in terms of surgery complications.
 
Discussion & Conclusions: This study showed no difference between the treatment methods (i.e., three cross pin and 4 pin trans-radioulnar) regarding radiographic criteria and surgery complications.