Beverly M C, Horan F T, Hutton W C
Int Orthop. 1985;9(2):101-4. doi: 10.1007/BF00266950.
The first metatarsophalangeal joint was replaced by a flexible silastic hinge prosthesis in 33 joints of 25 patients. Most patients were pleased with the operation but one third had some discomfort under the second and third metatarsal heads. We used a computer linked load cell matrix to analyse the forces under these feet during normal walking. After silastic arthroplasty there was a rise of 65% in peak load under the second and third metatarsal heads compared with that found in the opposite feet which had not undergone operation (P less than 0.001). This was associated with a fall in peak load under the hallux of 43% (P less than 0.03) compared to normal and a less significant fall averaging 23% in the peak pressure experienced under the first metatarsal head. There was a rise in peak heel loading and a reduction in the normal pronation which occurs during the stance phase of walking.
在25例患者的33个关节中，采用柔性硅橡胶铰链假体置换第一跖趾关节。大多数患者对手术满意，但三分之一的患者在第二和第三跖骨头下方有一些不适。我们使用计算机连接的测力传感器矩阵来分析这些足部在正常行走时的受力情况。与未接受手术的对侧足部相比，硅橡胶关节成形术后第二和第三跖骨头下方的峰值负荷增加了65%（P<0.001）。与正常情况相比，拇趾下方的峰值负荷下降了43%（P<0.03），第一跖骨头下方所承受的峰值压力平均下降23%，但下降幅度较小。足跟峰值负荷增加，行走站立期出现的正常内旋减少。
