Comparison of conventional versus computer-navigated acetabular component insertion

Area of Science:

• Orthopedic Surgery
• Medical Imaging
• Surgical Navigation

Background:

• Accurate acetabular component placement is crucial for total hip arthroplasty (THA) success.
• Conventional freehand techniques present challenges in achieving precise orientation.
• Computer navigation offers potential for improved accuracy in THA component positioning.

Purpose of the Study:

• To compare the efficacy of computer navigation versus freehand techniques for acetabular cup placement.
• To evaluate the accuracy of acetabular component inclination and anteversion in THA.
• To determine if CT-based navigation improves orientation compared to freehand methods.

Main Methods:

• Retrospective study comparing two groups of THA patients.
• Group 1: 69 patients with freehand cup insertion and pre-operative CT planning.
• Group 2: 98 patients with CT-based navigation for cup insertion, all with post-operative CT.

Main Results:

• CT-based navigation achieved average inclination of 43° and anteversion of 22.2°.
• Freehand technique resulted in average inclination of 45.7° and anteversion of 28.5°.
• Statistically significant improvement (P < .0001) in accuracy for CT-based navigation.

Conclusions:

• CT-based computer navigation demonstrates substantial statistical improvement in acetabular cup placement accuracy.
• Navigation techniques offer enhanced precision for component orientation in THA.
• This suggests a potential benefit of computer navigation for optimizing THA surgical outcomes.