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KMID : 1207720120040030193
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Clinics in Orthopedic Surgery
2012 Volume.4 No. 3 p.193 ~ p.199
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Three Dimensional CT-based Virtual Patellar Resection in Female Patients Undergoing Total Knee Replacement: A Comparison between Tendon and Subchondral Method
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Park Do-Young
Ji Hyung-Min
Kwak Kyu-Sung
Nair Surej Gopinathan
Won Ye-Yeon
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Abstract
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Background: Due to its small size, variable shape, and lack of distinct anatomical landmarks, osteoarthritic knees make a precise patellar resection extremely difficult.
Methods: We performed virtual patellar resection with digital software using three dimensional computed tomography scans of knees from 49 patients who underwent primary total knee replacement at our hospital. We compared 2 commonly used resection methods, the tendon method (TM) and the subchondral method, to determine an ideal resection plane with respect to the symmetry and thickness of the patellar remnant.
Results: The TM gave a thicker resected patella, and a less oval cut surface shape, which gives better coverage for a domed prosthesis. Both methods, however, gave a symmetric resection both superior-inferiorly, as well as mediolaterally.
Conclusions: Although TM appears statistically better with respect to the thickness and cut surface shape, only further intraoperative studies with long-term clinical follow-up may provide us with the most appropriate patellar resection method.
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KEYWORD
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Three dimensional computed tomography, Patellar resurfacing
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