Falotico Guilherme Guadagnini, Romero Valéria, Basile Ricardo, Takata Edmilson Takehiro
Universidade Federal de São Paulo, São Paulo, SP, Brazil.
Universidade Estadual de Campinas, Campinas, SP, Brazil.
Acta Ortop Bras. 2021 Sep-Oct;29(5):246-248. doi: 10.1590/1413-785220212905240525.
To date, the literature lacks consensus on the most efficient method to measure the range of motion of an in vitro prosthetic system. In this study, we propose the use of a relatively low-cost online software to measure the range of motion of hip prosthetic implants manufactured in Brazil and compare its results with the current technical standards for hip arthroplasty.
Three different diameters of femoral heads were evaluated (28 mm, 32 mm, and 36 mm). The mean values of the angular displacement of the prosthesis in each motion axis were obtained by computer simulations.
The range of motion with each femoral head was 28mm (extension/flexion: 148°, internal/external rotation: 179°, adduction/abduction: 107°), 32 mm (152°/185°/114°), and 36 mm (158°/193°/120°).
The computational method showed that the larger the femoral head, the greater the range of motion of the hip joint prosthetic system. Additional clinical studies are necessary to compare the physical results obtained with the values found in this study by computational modeling.
迄今为止，文献中对于测量体外假体系统活动范围的最有效方法尚未达成共识。在本研究中，我们提议使用一款成本相对较低的在线软件来测量巴西制造的髋关节假体植入物的活动范围，并将其结果与目前髋关节置换术的技术标准进行比较。
评估了三种不同直径的股骨头（28毫米、32毫米和36毫米）。通过计算机模拟获得假体在每个运动轴上的角位移平均值。
每个股骨头的活动范围分别为28毫米（伸展/屈曲：148°，内旋/外旋：179°，内收/外展：107°）、32毫米（152°/185°/114°）和36毫米（158°/193°/120°）。
计算方法表明，股骨头越大，髋关节假体系统的活动范围越大。需要进行更多的临床研究，以将实际获得的结果与本研究通过计算建模得出的值进行比较。
