Effect of posterior condylar offset on clinical results after posterior-stabilized total knee arthroplasty  

作　　者：Jian-Tao Wang Yu Zhang Qing Liu Qiang He Dong-Liang Zhang Ying Zhang Ji-Xuan Xiao Xin Mu Ming Hu 

机构地区：[1]Department of Orthopedics, Nankai University Tianjin Union Medical Center, Tianjin 300121, China [2]Department of Radiology, Tianjin Beichen Hospital, Tianjin 300000, China [3]Department of Occupadonal Disease, Second Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, Shandong 250001, China [4]Department of Orthopedics, Tianjin Beichen Hospital, Tianjin 300000, China

出　　处：《Chinese Journal of Traumatology》2015年第5期259-266,共8页中华创伤杂志（英文版）

摘　　要：Purpose： To determine the effect of the posterior condylar offset （PCO） on clinical results after total knee arthroplasty （TKA） using a high-flex posterior-stabilized （PS） fixed-bearing prosthesis. Methods： We prospectively studied the clinical and radiographic materials of 89 consecutive female patients （89 knees）, who had undergone primary TKAs for end-stage osteoarthritis. All operations were performed by a single senior surgeon or under his supervision using the same operative technique. Based on the corrected PCO change, we divided all cases into two groups： group A （corrected PCO change _〉0 mm, 58 knees） and group B （corrected PCO change 〈0 ram, 31 knees）. One-year postoperatively, clinical and radiographic variables from the two groups were compared by independent t-test. The as- sociations between the corrected PCO changes and the improvements of clinical variables in all patients were analyzed by Pearson linear correlation. Results： One-year postoperatively, the Knee Society Scores, the Western Ontario and McMaster Uni- versities Osteoarthritis Index, non-weight-bearing active and passive range of knee flexion, flexion contracture, extensor lag, and their improvements had no statistical differences between the two groups （all p 〉 0.05）. The corrected PCO change was not significantly correlated with the improvement of any clinical variable （all p 〉 0.05）. Group A demonstrated greater flexion than group B during active weight bearing （p 〈 0.05）. Conclusions： Restoration of PCO plays an important role in the optimization of active knee flexion during weight-bearing conditions after posterior-stabilized TKA, while it has no benefit to non-weight-bearing knee flexion or any other clinical result.

关 键 词：Arthroplasy REPLACEMENT KNEE Posterior stabilized Posterior condylar offset Knee flexion Clinical results 

分 类 号：U469.11[机械工程—车辆工程] X53[交通运输工程—载运工具运用工程]