O-arm with navigation versus C-arm: a review of screw placement over 3 years at a major trauma center.

AbstractIntroduction: There is a relatively high incidence of screw misplacement during spinal instrumentation due to distortion of normal anatomy following spinal trauma. The O-arm is the next-generation spinal navigation tool that provides intraoperative 3-D imaging and navigation for spine surgeries.Aims and objectives: To evaluate and compare the use of O-arm as compared to C-arm for spinal trauma in a Level I trauma center in India.Materials and methods: In this retrospective study over 3 years (July 2010–April 2013), All patients of spinal injury who underwent spinal instrumentation were divided into O-arm group and C-arm group. Accuracy of screw placement was assessed during each surgery in both groups.Results: A total of 587 patients were evaluated during the study period. There were 278 patients in O-arm group and 309 patients in C-arm group. Both groups were well matched in mean age (27.7 vs. 28.9 years), ASIA grades, and level of injury. The number of screws placed was significantly higher in t...