Computer-assisted navigation in TKA: where we are and where we are going

Area of Science:

• Orthopedic Surgery
• Medical Technology
• Biomedical Engineering

Background:

• Traditional intramedullary and extramedullary referencing systems are standard for bone resections in total knee arthroplasty.
• Accuracy in bone resections is critical for optimal total knee arthroplasty outcomes.
• Computer-assisted navigation (CAS) offers a potential improvement in surgical precision.

Purpose of the Study:

• To evaluate the accuracy of computer-assisted navigation systems in bone resections for total knee arthroplasty.
• To assess the impact of CAS on achieving precise coronal plane resections.
• To explore advancements in CAS software addressing soft tissue balance and preoperative imaging requirements.

Main Methods:

• Review of multiple randomized studies comparing CAS with standard referencing systems.
• Analysis of software modifications for soft tissue balance.
• Evaluation of bone morphing techniques that reduce reliance on preoperative imaging.

Main Results:

• Computer-assisted navigation systems demonstrate increased accuracy in bone resections compared to standard methods.
• Coronal plane resections with accuracy within 1 degree are routinely achievable with CAS.
• Recent software updates improve soft tissue balance and bone morphing techniques minimize the need for preoperative imaging.

Conclusions:

• Computer-assisted navigation significantly enhances the accuracy of bone resections in total knee arthroplasty.
• Despite current challenges in usability and cost, CAS is a valuable tool, particularly for complex patient anatomies.
• Further advancements in CAS technology are expected to increase its integration into routine surgical practice.