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Factors affecting patellar tracking after total knee arthroplasty.
Tsutomu Kawano1, Hiromasa Miura, Ryuji Nagamine
1Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
The Journal of Arthroplasty
|October 11, 2002
Summary
Proper patellar tracking after total knee arthroplasty is influenced by patellar component position and resection angle. Medializing the patellar component and resecting the patella obliquely improve tracking outcomes.
Area of Science:
- Orthopedic Surgery
- Biomechanical Engineering
- Medical Imaging
Background:
- Patellar tracking is crucial for optimal function after total knee arthroplasty (TKA).
- Suboptimal patellar tracking can lead to anterior knee pain and revision surgery.
- Identifying factors influencing patellar tracking is essential for improving TKA outcomes.
Purpose of the Study:
- To investigate the radiographic factors affecting postoperative patellar tracking following TKA.
- To determine the influence of specific surgical parameters on patellar alignment.
Main Methods:
- Radiographic evaluation of 62 knees post-TKA.
- Analysis of six potential influencing factors: patellar component position, patellar resection angle, lateral retinacular release, patellar resection thickness, preoperative patellar tilt, and femoral component rotational alignment.
Main Results:
- Patellar component position and patellar resection angle significantly impacted postoperative patellar tracking.
- Lateral retinacular release also showed an effect on patellar tracking.
- Patellar resection thickness, preoperative patellar tilt, and femoral component rotational alignment did not significantly influence tracking.
Conclusions:
- A medialized patellar component position and oblique patellar resection are effective surgical techniques for achieving proper patellar tracking.
- Further clinical studies are needed to fully evaluate the impact of femoral component external rotation on patellar tracking.