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首页> 外文OA文献 >In vivo kinematics and kinetics of a bi-cruciate substituting total knee arthroplasty: a combined fluoroscopic and gait analysis study.
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In vivo kinematics and kinetics of a bi-cruciate substituting total knee arthroplasty: a combined fluoroscopic and gait analysis study.

机译：双十字形置换全膝关节置换术的体内运动学和动力学：荧光镜和步态分析的组合研究。

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After total knee arthroplasty, changes in articular surface geometry, soft tissue treatment, and component alignment can alter normal lower limb function. The guided motion bi-cruciate substituting prosthesis was designed specifically to restore physiological knee joint motion. We determined whether this design could in vivo normal kinematics and kinetics, not only at the replaced knee, but also throughout both lower limbs. Sixteen patients (4 male, 12 female, mean age of 68.2 years with a range from 58 to 79 years) with primary knee osteoarthritis were implanted with the bi-cruciate substituting prosthesis. At 6-month follow-up, knee joint kinematics was assessed by video-fluoroscopy during stair-climbing, chair-rising/sitting, and step-up/down. Lower limb overall function was also assessed on the same day by standard gait analysis with simultaneous electromyography during level walking. By video-fluoroscopy, mean anteroposterior translations between femoral and tibial components during the three motor tasks were 9.7 +/- 3.0, 10 +/- 2.6, and 6.9 +/- 3.5 mm on the medial compartment, and 14.3 +/- 3.5, 18.5 +/- 3.0, and 13.9 +/- 3.8 mm on the lateral compartment, respectively. Axial rotation ranged from 5.6 degrees to 26.2 degrees. Gait analysis revealed restoration of nearly normal walking patterns in most patients. This rare combination of measurements, i.e., accurate rotation-translation at the replaced knee and complete locomotion patterns at both lower limb joints, suggested that bi-cruciate substituting arthroplasty can restore physiological knee motion and normal overall function.
机译：全膝关节置换术后，关节表面几何形状的变化，软组织治疗和组件对齐会改变正常的下肢功能。专门设计了引导运动双十字形置换假体，以恢复生理性膝关节运动。我们确定了这种设计是否能够在正常的运动学和动力学方面，不仅在被替换的膝盖处，而且还在整个下肢。原发性双膝置换假体植入了16例原发性膝骨骨关节炎患者（男4例，女12例，平均年龄68.2岁，年龄在58至79岁之间）。在6个月的随访中，在爬楼梯，椅子升起/坐着，以及上/下台阶过程中，通过视频透视检查评估了膝关节的运动学。在同一天，通过水平步态分析和水平肌电同时肌电评估下肢的整体功能。通过视频荧光检查，在三个运动任务期间，股骨和胫骨组件之间的平均前后平移分别为内侧隔室的9.7 +/- 3.0、10 +/- 2.6和6.9 +/- 3.5 mm，以及14.3 +/- 3.5，侧隔室分别为18.5 +/- 3.0和13.9 +/- 3.8毫米。轴向旋转范围从5.6度到26.2度。步态分析显示，大多数患者的行走模式恢复正常。这种罕见的测量方法结合在一起，即在被替换的膝盖处进行精确的旋转平移，并在下肢两个关节处完成运动方式，这表明用双十字路口置换关节置换术可以恢复生理性的膝盖运动和正常的整体功能。

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