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Mobile-bearing insert reduced patellar contact force at knee flexion during posterior stabilized total knee arthroplasty.
Clinical Biomechanics ( IF 1.8 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.clinbiomech.2020.105022
Yuichi Kuroda 1 , Koji Takayama 1 , Shinya Hayashi 1 , Shingo Hashimoto 1 , Masanori Tsubosaka 1 , Tomoyuki Kamenaga 1 , Takehiko Matsushita 1 , Takahiro Niikura 1 , Ryosuke Kuroda 1 , Tomoyuki Matsumoto 1
Affiliation  

BACKGROUND This study aimed to compare tibial rotation and patellar contact force between mobile- and fixed-bearing total knee arthroplasty from extension to flexion by using a navigation system and patellar contact force sensor on the same patients' knees. METHODS Thirty-one consecutive patients who had undergone a primary posterior stabilized total knee arthroplasty were included. Patellar contact forces on the medial and lateral sides were measured at each flexion angle, and tibial rotation was assessed during 30-90°, and 90-120° knee flexion. The patellar contact force and tibial rotation were measured twice with the mobile- and fixed-platform trial components and compared between the two groups. FINDINGS The patellar contact force was significantly lower with mobile than with fixed-bearing total knee arthroplasty on the medial side at 120° flexion (P = .0138) and lateral side at 60°, 90°, and 120° flexion (P = .0346, P = .0127, and P = .0376). There were no significant differences in tibial rotation between the mobile- and fixed-bearing inserts during both 30-90° and 90-120° knee flexion. INTERPRETATION Patellar contact force was significantly lower, especially on the lateral side in mobile than in fixed-bearing total knee arthroplasty, whereas no significant difference in tibial internal rotation was found between the two inserts. Mobile-bearing inserts might reduce the patellar contact force by the bearing rotation, rather than natural tibial rotation during posterior stabilized total knee arthroplasty.

中文翻译:

在后路稳定的全膝关节置换术中,活动轴承插入物可降低膝盖屈曲时的pa骨接触力。

背景技术本研究旨在通过在同一患者膝盖上使用导航系统和on骨接触力传感器,比较从伸展到屈曲的活动式和固定式全膝关节置换术之间的胫骨旋转和pa骨接触力。方法纳入了31例行原发性后稳定全膝关节置换术的患者。在每个屈曲角度测量内侧和外侧的media骨接触力,并在30-90°和90-120°屈膝期间评估胫骨旋转。the骨接触力和胫骨旋转用移动平台和固定平台试验组件进行了两次测量,并在两组之间进行了比较。研究发现,与固定固定全膝关节置换术相比,活动时pa骨的接触力明显低于固定侧全膝关节置换术,内侧弯曲度为120°(P = .0138),外侧弯曲度为60°,90°和120°(P =。 0346,P = .0127和P = .0376)。在30-90°和90-120°膝盖屈曲期间,活动式和固定式刀片之间的胫骨旋转没有显着差异。解释Pat骨接触力显着降低,尤其是在移动侧than骨固定力与固定固定全膝关节置换术相比明显降低,而两个插入物之间的胫骨内旋转没有显着差异。在后路稳定的全膝关节置换术中,活动轴承插件可能会通过轴承旋转而不是自然的胫骨旋转来降低reduce骨接触力。0138)和侧面分别以60°,90°和120°弯曲(P = .0346,P = .0127和P = .0376)。在30-90°和90-120°膝盖屈曲期间,活动式和固定式刀片之间的胫骨旋转没有显着差异。解释Pat骨接触力显着降低,尤其是在移动侧than骨固定力与固定固定全膝关节置换术相比明显降低,而两个插入物之间的胫骨内旋转没有显着差异。在后路稳定的全膝关节置换术中,活动轴承插件可能会通过轴承旋转而不是自然的胫骨旋转来降低reduce骨接触力。0138)和侧面分别以60°,90°和120°弯曲(P = .0346,P = .0127和P = .0376)。在30-90°和90-120°膝盖屈曲期间,活动式和固定式刀片之间的胫骨旋转没有显着差异。解释Pat骨接触力显着降低,尤其是在移动侧than骨固定力与固定固定全膝关节置换术相比明显降低,而两个插入物之间的胫骨内旋转没有显着差异。在后路稳定的全膝关节置换术中,活动轴承插件可能会通过轴承旋转而不是自然的胫骨旋转来降低tell骨接触力。在30-90°和90-120°膝盖屈曲期间,活动式和固定式刀片之间的胫骨旋转没有显着差异。解释Pat骨接触力显着降低,尤其是在移动侧than骨固定力与固定固定全膝关节置换术相比明显降低,而两个插入物之间的胫骨内旋转没有显着差异。在后路稳定的全膝关节置换术中,活动轴承插件可能会通过轴承旋转而不是自然的胫骨旋转来降低reduce骨接触力。在30-90°和90-120°膝盖屈曲期间,活动式和固定式刀片之间的胫骨旋转没有显着差异。解释Pat骨接触力明显低于固定支架全膝关节置换术,尤其是在活动侧侧面,而在两个插入物之间,胫骨内旋没有明显差异。在后路稳定的全膝关节置换术中,活动轴承插件可能会通过轴承旋转而不是自然的胫骨旋转来降低tell骨接触力。
更新日期:2020-05-01
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