Three Dimensional CT-based Virtual Patellar Resection in Female Patients Undergoing Total Knee Replacement: A Comparison between Tendon and Subchondral Method.
10.4055/cios.2012.4.3.193
- Author:
Do Young PARK
1
;
Hyung Min JI
;
Kyu Sung KWAK
;
Surej Gopinathan NAIR
;
Ye Yeon WON
Author Information
1. Division of Arthroplasty, Department of Orthopaedics, Ajou University School of Medicine, Suwon, Korea. thrtkr@ajou.ac.kr
- Publication Type:Original Article ; Comparative Study ; Research Support, Non-U.S. Gov't
- Keywords:
Three dimensional computed tomography;
Patellar resurfacing
- MeSH:
Aged;
Aged, 80 and over;
Arthroplasty, Replacement, Knee/*methods;
Female;
Humans;
Imaging, Three-Dimensional/*methods;
Middle Aged;
Patella/*anatomy & histology/*surgery;
Surgery, Computer-Assisted/*methods;
Tomography, X-Ray Computed/*methods
- From:Clinics in Orthopedic Surgery
2012;4(3):193-199
- CountryRepublic of Korea
- Language:English
-
Abstract:
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.
