کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4063561 | 1604060 | 2008 | 11 صفحه PDF | دانلود رایگان |
The objective of this study was to determine the in vivo kinematics for subjects having either a fixed posterior stabilized (PS) or cruciate retaining (CR) high-flexion total knee arthroplasty (TKA). Three-dimensional kinematics from full extension to maximum flexion were determined for 30 subjects (15 PS, 15 CR) using fluoroscopy. On average, the PS subjects demonstrated 112° of weight-bearing (WB) flexion, −6.4 mm of posterior femoral rollback, and 2.9° of axial rotation. The CR subjects averaged 117° of WB flexion, −4.9 mm of posterior femoral rollback, and 4.8° of axial rotation. Posterior femoral rollback of the lateral condyle occurred for all PS TKAs and in 93% of the CR TKAs. Only 2 subjects in each group experienced greater than 1.0 mm of condylar lift-off. Subjects in both TKA groups demonstrated excellent WB ranges of motion and kinematic patterns similar to the normal knee, but less in magnitude.
Journal: The Journal of Arthroplasty - Volume 23, Issue 7, October 2008, Pages 1057–1067