Abstract：
Bi-cruciate retaining total knee arthroplasty with an asymmetrical design may improve knee function and clinical outcomes. This study aimed to compare the kinematics, anteroposterior laxity, and in situ forces of the anterior and posterior cruciate ligaments of knees subjected to this treatment with those of healthy knees.
Seven fresh-frozen cadaveric knees were tested using a robotic/universal force-moment sensor system. The kinematics during passive flexion-extension motion and anteroposterior laxity for native knee, treated knee, and treated knee with cruciate ligament transection states were investigated. The motions of the intact and treated knees during each test were repeated after anterior/posterior cruciate ligament transection to calculate the in situ force in the ligaments.
The screw-home movement of normal knees disappeared after treatment. The in situ force of the anterior cruciate ligament in treated knees was higher than that in intact knees at ˃15° during flexion and at 60° and 90° against an anterior force. The in situ force of the posterior cruciate ligament in treated knees was higher at 0°, 15°, and 30° during flexion and at all flexion angles against a posterior force.
The screw-home movement of normal knees decreased, and the in situ force of the anterior and posterior cruciate ligaments increased after treatment.
Seven fresh-frozen cadaveric knees were tested using a robotic/universal force-moment sensor system. The kinematics during passive flexion-extension motion and anteroposterior laxity for native knee, treated knee, and treated knee with cruciate ligament transection states were investigated. The motions of the intact and treated knees during each test were repeated after anterior/posterior cruciate ligament transection to calculate the in situ force in the ligaments.
The screw-home movement of normal knees disappeared after treatment. The in situ force of the anterior cruciate ligament in treated knees was higher than that in intact knees at ˃15° during flexion and at 60° and 90° against an anterior force. The in situ force of the posterior cruciate ligament in treated knees was higher at 0°, 15°, and 30° during flexion and at all flexion angles against a posterior force.
The screw-home movement of normal knees decreased, and the in situ force of the anterior and posterior cruciate ligaments increased after treatment.
摘要：
背景：采用非对称设计的双十字保留全膝关节置换术可以改善膝关节功能和临床疗效。本研究旨在比较运动学，前后松弛，以及接受这种治疗的膝盖前交叉韧带和后交叉韧带与健康膝盖的原位力。
方法：使用机器人/通用力-力矩传感器系统测试了七个新鲜冷冻的尸体膝盖。被动屈伸运动和天然膝关节前后松弛时的运动学，治疗过的膝盖，并对交叉韧带横断状态的膝关节进行了研究。在前/后交叉韧带横切后，重复每次测试中完整和治疗过的膝盖的运动，以计算韧带中的原位力。
结果：治疗后，正常膝关节的螺钉归巢运动消失。在屈曲过程中±15°以及在60°和90°抵抗前力时，治疗膝盖的前交叉韧带的原位力高于完整膝盖。治疗膝关节后交叉韧带的原位力在0°时更高，15°,在屈曲期间和在所有屈曲角度下抵抗后力的30°。
结论：正常膝盖的螺丝运动减少，治疗后前后交叉韧带的原位力增加。
方法：使用机器人/通用力-力矩传感器系统测试了七个新鲜冷冻的尸体膝盖。被动屈伸运动和天然膝关节前后松弛时的运动学，治疗过的膝盖，并对交叉韧带横断状态的膝关节进行了研究。在前/后交叉韧带横切后，重复每次测试中完整和治疗过的膝盖的运动，以计算韧带中的原位力。
结果：治疗后，正常膝关节的螺钉归巢运动消失。在屈曲过程中±15°以及在60°和90°抵抗前力时，治疗膝盖的前交叉韧带的原位力高于完整膝盖。治疗膝关节后交叉韧带的原位力在0°时更高，15°,在屈曲期间和在所有屈曲角度下抵抗后力的30°。
结论：正常膝盖的螺丝运动减少，治疗后前后交叉韧带的原位力增加。
