The effect of surgical approach on the accuracy of measuring acetabular component orientation with a CT-based hip navigation system

摘要

Introduction: There is enormous enthusiasm for total hip arthroplasty (THA) using minimally invasive surgery (MIS) to reduce the invasiveness of traditional surgery. But it is always a challenge to avoid misalignment of the implants where there is limited exposure [1]. Computer assisted surgery is expected to reduce the risk of malposition in MIS-THA and we have shown some advantages of CT-based navigation through a posterior mini-incision THA [2]. There are, however, several approaches for MIS-THA, and the type of approach may affect the accuracy of the registration due to the different areas exposed for registration. The purpose of this study was to investigate the effect of two different surgical approaches, - direct anterior approach and posterior approach, - on the accuracy of surface registration for cup placement.