Tanino Hiromasa, Ito Hiroshi, Harman Melinda K, Matsuno Takeo, Hodge W Andrew, Banks Scott A
Department of Mechanical & Aerospace Engineering, University of Florida, Gainesville, Florida 32611-6250, USA.
J Arthroplasty. 2008 Aug;23(5):714-20. doi: 10.1016/j.arth.2007.07.004. Epub 2008 Jan 22.
We have developed an intraoperative model to quantify total hip arthroplasty impingement and dislocation mechanics using fluoroscopy and shape-matching techniques. Two patient groups were investigated: group 1 consisted of 12 hips using 28- or 32-mm femoral heads and an anterolateral surgical approach, and group 2 consisted of 17 hips using 22- or 26-mm femoral heads and a posterolateral surgical approach. During intraoperative hip stability testing consisting of extension and external rotation motions, group 1 was more unstable, and prosthetic impingement was the major reason for dislocation. With flexion and internal rotation motions, group 2 was more unstable, and superior-lateral impingement or soft tissue traction was the major reason for dislocation. Intraoperative quantitative assessment of hip mechanics provides a safe and clinically relevant method to characterize potential complications and evolve techniques to prevent them.
我们开发了一种术中模型，使用荧光透视和形状匹配技术来量化全髋关节置换术的撞击和脱位力学。研究了两组患者：第1组由12个髋关节组成，使用28或32毫米的股骨头，采用前外侧手术入路；第2组由17个髋关节组成，使用22或26毫米的股骨头，采用后外侧手术入路。在由伸展和外旋运动组成的术中髋关节稳定性测试中，第1组更不稳定，假体撞击是脱位的主要原因。在屈曲和内旋运动中，第2组更不稳定，上外侧撞击或软组织牵引是脱位的主要原因。术中对髋关节力学进行定量评估提供了一种安全且与临床相关的方法，以表征潜在并发症并改进预防这些并发症的技术。
