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Computer-assisted minimally invasive total knee arthroplasty compared with standard total knee arthroplasty. A
Andrew Quoc Dutton1, Seng-Jin Yeo, Kuang-Ying Yang
1Department of Orthopaedic Surgery, National University Hospital, 5 Lower Kent Ridge Road, Singapore 119074, Republic of Singapore. andrew_dutton@hotmail.com
Computer-assisted minimally invasive total knee arthroplasty (TKA) shows improved radiographic alignment and faster early functional recovery compared to conventional TKA. This technique offers better postoperative alignment without increasing short-term complications.
Area of Science:
- Orthopedic surgery
- Surgical navigation technology
- Knee arthroplasty
Background:
- Limited data exists on computer navigation feasibility in minimally invasive total knee arthroplasty (TKA) due to obscured landmarks.
- Assessing radiographic accuracy and functional recovery is crucial for this technique.
Purpose of the Study:
- To determine the radiographic accuracy of computer-assisted minimally invasive TKA.
- To compare functional recovery rates between computer-assisted minimally invasive TKA and conventional TKA.
Main Methods:
- 108 patients were randomized to computer-assisted minimally invasive TKA or conventional TKA.
- Standardized perioperative pain management was applied.
- Clinical parameters, long-leg radiographs, and functional scores were assessed for six months postoperatively.
Main Results:
- Computer-assisted minimally invasive TKA had a longer operative time (24 min mean) but a shorter inpatient stay (3.3 vs. 4.5 days).
- More patients in the computer-assisted group walked independently at one month (p=0.04).
- Improved coronal tibiofemoral angle alignment was observed in the computer-assisted group (92% vs. 68%, p=0.003).
Conclusions:
- Computer-assisted minimally invasive TKA demonstrates an early increase in functional recovery within the first postoperative month.
- The primary benefit is improved postoperative radiographic alignment compared to conventional TKA.
- This technique does not increase short-term complications.