Why perform total hip arthroplasty using surgical navigation?

摘要

Introduction: Malpositioned acetabular components can lead to hip impingement, instability, wear, wear-associated osteolysis, and revision for instability, impingement, osteolysis, or component loosening 1. Inequality in leg length is another major source of dysfunction and dissatisfaction following total hip ar-throplasty2, causing gait asymmetry, hip and low back pain and in severe cases, also leads to revision surgery3. Implanting the components correctly and optimizing leg length correction is a challenge to the surgeon. Specifically, proper acetabular component positioning can be complicated by the fact that intraop-erative pelvic tilt and version are often unknown or wrongly estimated during surgery4-7. Thus, mechanical guides that assume an orthogonal position of the pelvis during surgery, are clearly inadequate to ensure proper component positioning.8 This problem is further accentuated with the advent of less invasive techniques, where proper acetabular component positioning can be even more difficult.