Clinical and Radiographic Outcomes With Minimum 2-Year Follow-up and Sub-Analysis of Navigation vs Non-Navigation for...

Area of Science:

• Orthopedic Surgery
• Medical Technology
• Biomechanical Engineering

Background:

• Hip resurfacing is a surgical procedure for hip joint issues.
• Accurate acetabular implant placement is crucial for successful outcomes.
• Navigation systems may improve surgical accuracy.

Purpose of the Study:

• To evaluate short-term clinical outcomes of navigation-assisted hip resurfacing.
• To assess the impact of navigation on acetabular implant placement accuracy.
• To compare outcomes and accuracy between navigated and conventional hip resurfacing.

Main Methods:

• Retrospective analysis of hip resurfacing patients (2010-2021).
• Propensity matching (1:1) based on navigation use, age, and BMI.
• Assessment of patient-reported outcomes (mHHS, HHS, FJS, VAS, HOOS-JR) and component placement within defined safe zones.

Main Results:

• No significant differences in patient-reported outcomes or minimal clinically important difference (MCID) achievement between groups.
• Navigation group showed significantly higher likelihood of acetabular component placement within Callanan (28.8x) and Lewinnek (6.8x) safe zones.
• Navigation group also demonstrated higher likelihood of placement within 95% (3.1x) and 99% (6.4x) CI safe zones based on Relative Acetabular Inclination Limit.

Conclusions:

• Navigation-assisted hip resurfacing provides comparable patient-reported outcomes to conventional methods at 2-year follow-up.
• Navigation significantly enhances the accuracy of acetabular component positioning.
• This improved accuracy increases the likelihood of optimal implant placement within critical safe zones.