The single mobility bearing as a previous bearing design of total hip prosthesis has severe mobility constraints that can result in dislocation during Muslim (people who follow the Islam as religion) prayer movements, specifically shalat that requires intense movement. There are five intense movements (i.e., bowing, prostration, sitting, transition from standing to prostration, and final sitting) during Muslim prayer that may generate an impingement problem for patients with total hip prosthesis. In this work, textured dual mobility total hip prosthesis with two textured cases (i.e., textured femoral head and textured inner liner) are presented and their performances are numerically evaluated against untextured surface model during Muslim prayer movement. The concave dimple design is chosen for surface texturing, while for simulating femoral head materials, SS 316L and CoCrMo is choosen. To represent the real condition, three-dimensional computational fluid dynamics (CFD) coupled with two-way fluid–structure interaction (FSI) methods are employed to analyze elastohydrodynamic lubrication problem with non-Newtonian synovial fluid model. The main aim of the present study is to investigate the tribological performance on dual mobility total hip prosthesis with applied textured surface with concave dimple in femoral head and inner liner surface under Muslim prayer movements. It is found that applying surface texturing has a beneficial effect on the lubrication performance for some intense movements. The textured femoral head model performs better than textured inner liner model and untextured model (both femoral head and inner liner). The numerical results also indicate superior performance of CoCrMo femoral head compared to SS 316L femoral head. These findings can be used as a reference for biomedical engineers and orthopedic surgeons in designing and choosing suitable total hip prosthesis for Muslims makes they can carry out Muslim prayer movements like humans in general who have normal hip joints.

单一活动轴承作为全髋关节假体先前的轴承设计，具有严重的活动限制，可能导致穆斯林（信奉伊斯兰教的人）祈祷运动时脱臼，特别是需要剧烈运动的沙拉。穆斯林祈祷期间有五种激烈的动作（即鞠躬、跪拜、坐下、从站立过渡到跪拜以及最后坐下），可能会给全髋关节假体患者带来撞击问题。在这项工作中，提出了具有两个纹理案例（即纹理股骨头和纹理内衬）的纹理双活动全髋关节假体，并在穆斯林祈祷运动期间针对无纹理表面模型对它们的性能进行了数值评估。表面纹理选择凹坑设计，模拟股骨头材料选择SS 316L和CoCrMo。为了代表真实情况，采用三维计算流体动力学（CFD）结合双向流固耦合（FSI）方法来分析非牛顿滑液模型的弹流动力润滑问题。本研究的主要目的是研究双活动全髋关节假体在穆斯林祈祷运动下的摩擦学性能，该假体在股骨头和内衬表面上应用有凹坑的纹理表面。研究发现，应用表面纹理对某些剧烈运动的润滑性能有有益的影响。有纹理的股骨头模型比有纹理的内衬模型和无纹理的模型（股骨头和内衬）表现更好。数值结果还表明，与 SS 316L 股骨头相比，CoCrMo 股骨头具有更优越的性能。 这些研究结果可以作为生物医学工程师和骨科医生为穆斯林设计和选择合适的全髋关节假体的参考，使他们能够像一般具有正常髋关节的人类一样进行穆斯林祈祷动作。