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A randomized controlled trial to compare component placement in navigated total knee arthroplasty using original and
Nadia C Sciberras1, Mohammed Almustafa1, Benjamin R K Smith2
1Department of Orthopaedics, Golden Jubilee National Hospital, Clydebank, Scotland, UK.
Arthroplasty Today
|July 12, 2017
Summary
A new navigated total knee arthroplasty (TKA) software (Smart) reduced registration time without affecting component accuracy. However, the overall surgical time for TKA remained unchanged.
Area of Science:
- Orthopedic Surgery
- Medical Device Technology
- Surgical Navigation
Background:
- A redesigned navigated total knee arthroplasty (TKA) software (Smart) was evaluated against the previous version (Classic).
- The study aimed to assess accuracy and time efficiency of the Smart software in TKA procedures.
Purpose of the Study:
- To determine if the Smart software maintains component positioning accuracy compared to the Classic version.
- To evaluate if the Smart software reduces registration and operative times in navigated TKA.
Main Methods:
- A randomized controlled trial involving 220 patients undergoing navigated TKA.
- Comparison of Smart software against Classic software, with identical perioperative care.
- Postoperative CT scans assessed by an independent radiologist for mechanical alignment and component positioning.
Main Results:
- Equivalent mean postoperative mechanical femorotibial angles between Smart and Classic groups (-0.2° difference, P = .407).
- Significantly reduced mean registration time for Smart group (2 min 30 sec) vs. Classic group (3 min 23 sec, P < .001).
- No significant difference in mean operative time between groups (72 min, P = .855); similar 6-week clinical outcomes and patient satisfaction (96.5%).
Conclusions:
- The Smart navigated TKA software achieves comparable component accuracy to the Classic version.
- While registration time is reduced, the overall operative time for navigated TKA is not significantly affected by the Smart software.
