Gerber C, Jakob R P, Ganz R
Arch Orthop Trauma Surg (1978). 1983;101(4):291-6. doi: 10.1007/BF00379946.
A limited mobilisation cast (LMC) with hinges locked at 20 and 60 degrees has been advocated for the care after anterior cruciate ligament (ACL) surgery. The brace presumably limits motion to 20 and 60 degrees and prevents straining of the ACL. Extension of more than 20 degrees as well as anterior drawer forces are known to strain the ACL. We have therefore tested whether the LMC reliably limits the desired range of motion: Extension of more than 20 degrees was found in 11 of 12 patients and averaged 12 degrees. The long leg cast reduced a 30 degree anterior drawer in unstable knees by 70%, a Lenox-Hill-Derotation Brace by 53% and the LMC by only 14%. It was concluded that a modified Lenox-Hill Brace locked at 30 and 60 degrees of flexion provides better stress-protection of the ACL than a LMC and that the safety of the conventional long leg cast should be remembered in legs with unfavourable soft tissue configurations. If a LMC is used, it should be fixed to the trunk with a waist- or shoulder-strap and the hinges must be freely adjustable.
一种铰链锁定在20度和60度的有限活动支具（LMC）已被推荐用于前交叉韧带（ACL）手术后的护理。该支具大概将活动限制在20度和60度，并防止ACL受到牵拉。已知超过20度的伸展以及前抽屉力会使ACL受到牵拉。因此，我们测试了LMC是否能可靠地限制所需的活动范围：12名患者中有11名出现超过20度的伸展，平均为12度。长腿石膏使不稳定膝关节中30度的前抽屉减少了70%，Lenox-Hill旋转矫正支具减少了53%，而LMC仅减少了14%。得出的结论是，锁定在30度和60度屈曲位的改良Lenox-Hill支具比LMC能更好地为ACL提供应力保护，并且在软组织结构不利的腿部应记住传统长腿石膏的安全性。如果使用LMC，应用腰部或肩部固定带将其固定在躯干上，并且铰链必须可自由调节。
