Computer-assisted surgery: a teacher of TKAs

Area of Science:

• Orthopedic surgery
• Surgical navigation systems

Background:

• Computer-aided navigation may enhance surgeons' visual/spatial awareness and component placement accuracy in total knee arthroplasty (TKA).
• The study investigates the educational impact of navigation systems on surgical skill development.

Purpose of the Study:

• To demonstrate the educational role of navigation systems in improving prosthetic component alignment.
• To assess the impact of computer-aided navigation experience on surgical precision in TKA.

Main Methods:

• 150 TKA patients were divided into three groups: non-navigated (no prior experience), computer-assisted navigated, and non-navigated (post-navigation experience).
• Surgeon with over 5 years of TKA experience performed all surgeries.
• Coronal plane alignment was evaluated using full-length weight-bearing radiographs, with optimal placement defined as within ±3° varus/valgus.

Main Results:

• Optimal component placement was achieved in 68% of the non-navigated group (A), 92% in the navigated group (B), and 82% in the post-navigation group (C).
• Statistically significant improvements in optimal placement were observed comparing group A to B (P<0.001) and group A to C (P=0.04).
• No significant difference was found between the navigated group (B) and the post-navigation group (C) (P=0.2).

Conclusions:

• Computer-aided navigation systems possess an educational value for surgeons.
• Navigation experience enhances the ability to precisely position prosthetic components in the coronal plane during TKA.