Minamikawa Y, Imaeda T, Amadio P C, Linscheid R L, Cooney W P, An K N
Division of Hand Surgery, Mayo Clinic, Rochester, MN 55905.
J Hand Surg Am. 1994 Nov;19(6):1050-4. doi: 10.1016/0363-5023(94)90116-3.
The lateral stability of the cadaver proximal interphalangeal joint was studied with an electromagnetic tracking system before and after implant replacement. Ten middle fingers were retrieved and randomly divided into two groups for joint replacement with either a silicone rubber flexible finger joint implant or a custom surface replacement prosthesis. Each finger was mounted on a fixture that allowed loading of the proximal interphalangeal joint with tension through the flexor, extensor, and intrinsic tendons. For the intact proximal interphalangeal joint under lateral stress, lateral angulation averaged 4 degrees in extension and 8 degrees with the joint in 60 degrees of flexion. Although lateral angulation increased after surface replacement prosthesis implantation when the joint was flexed more than 20 degrees, comparison with the intact joint showed no statistical difference. With the silicone implant, lateral angulation became more pronounced even in the extended position and showed a significant difference when the proximal interphalangeal joint was flexed more than 20 degrees.
使用电磁跟踪系统，在植入物置换前后对尸体近端指间关节的侧向稳定性进行了研究。选取了10根中指，随机分为两组，分别用硅橡胶柔性手指关节植入物或定制的表面置换假体进行关节置换。每个手指安装在一个固定装置上，该装置允许通过屈肌、伸肌和固有肌腱对近端指间关节施加张力负荷。对于完整的近端指间关节在侧向应力作用下，伸直时平均侧向成角为4度，关节在60度屈曲时为8度。虽然在植入表面置换假体后，当关节屈曲超过20度时侧向成角增加，但与完整关节相比无统计学差异。使用硅橡胶植入物时，即使在伸直位置侧向成角也更明显，并且当近端指间关节屈曲超过20度时显示出显著差异。
