Abstract
Contact area and stress distribution of the polyethylene liner (PE liner) have a major influence on the wear process. The main factor that affects the contact area and stress on the PE liner is thickness. The International Standards Organization (ISO) recommends a minimum PE liner thickness of 6 mm. However, the thickness of PE liner in a bipolar hip prosthesis has a limited range of motion compared to the unipolar one due to the addition of the outer liner component. Therefore, the study of the effect of PE liner thickness on the contact area and stress distribution in the bipolar model is interesting. Theaim of this research is to investigate the effect of the PE liner thickness to the contact area and stress distribution on the surface of contact between head and PE liner and the contact between outer liner and cup in the bipolar model. This research was carried out by finite element analysis. The results showed that the highest contact stress on the liner occurred at the lowest liner thickness. The maximum contact radius on the liner surface took place at the highest liner thickness. The bipolar model with the liner thickness of 4.5 mm in this research provided the lowest contact stress.
Highlights
Islam is the largest religion in Indonesia based on the central bureau of statistics in Indonesia [1]
Salat activity and the general activities will affect the motion of hip prosthesis [3,4,5]
One of the differences between Salat activity and daily activities is the range of motion (RoM) in the hip prosthesis movement
Summary
Islam is the largest religion in Indonesia based on the central bureau of statistics in Indonesia [1]. In Islam, its adherent is called as a Muslim. One of the religious activities for Muslim is Salat activity. Salat is an essential activity for Muslim, including for Muslim patients who use hip prostheses. In another word, Salat activity and the general activities will affect the motion of hip prosthesis [3,4,5]. One of the differences between Salat activity and daily activities is the range of motion (RoM) in the hip prosthesis movement.
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