[Comparison of percutaneous versus open monosegment instrumentation in the treatment of incomplete thoracolumbar burst fracture].

OBJECTIVE: To compare the safety and efficacies of traditional open versus percutaneous monosegmental pedicle screw fixation in the treatment of incomplete thoracolumbar spinal fracture. METHODS: A retrospective analysis was conducted for 44 inpatients with a diagnosis of incomplete thoracolumbar spinal fracture (AO classification: A3.1 and A3.2) undergoing monosegmental pedicle instrumentation (MSPI) from September 2008 to January 2011. There were 24 cases in percutaneous group and 20 cases in traditional open group. The mean operative duration, blood loss, blood drainage, visual analogue scale/score (VAS) and vertebral kyphotic angle at pre- and post-operation were evaluated. RESULTS: No significant differences existed in operative durations between two groups (P > 0.05). Significant differences between two groups were observed in terms of intra-operative blood loss and VAS scores at Week 1 postoperation (P < 0.05). There were no significant differences in VAS score preoperation, 1 year postoperation or pre-and post-operative vertebral kyphotic angle (P > 0.05). No complications of iatrogenic neurological injury or hardware failure occurred. CONCLUSION: The application of percutaneous monosegment pedicle instrumentation in the treatment of thoracolumbar fractures in type of A 3.1 and A 3.2 is both feasible and safe. Its postoperative therapeutic effect is comparable to that of traditional open monosegmental fixation.