Osteoarthritis and osteonecrosis of the femoral head are serious diseases that require surgical treatment (endoprosthetics (EP)). Aseptic loosening of the femoral component of the implant is a consequence of the micro-destruction of bone tissue in the contact area. The mechanical behavior in the zone of contacting materials during EP is determined by the morphology of the surfaces. To study the effect of the roughness of contacting elements, computer modeling was used. A part of the femur with a pin from a superficial endoprosthesis was considered. The mechanical behavior of the model samples was studied under loading similar to the physiological one. Nonlinear features in the mechanical behavior of model samples with different surface roughnesses are revealed. It has been found that the most optimal bone roughness is about 0.2 mm.
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Smolin, A.Y., Eremina, G.M. Modeling of the Effect of Roughness of Contact Surfaces on the Risk of Aseptic Loosening of Endoprosthesis. Russ Phys J 66, 199–204 (2023). https://doi.org/10.1007/s11182-023-02925-0
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DOI: https://doi.org/10.1007/s11182-023-02925-0