The effect of femoral head size on the cement mantle in the layered artificial hip joint

Cemented system is the most widely system used in the operation of Total Hip Replacement (THR). In order to ensure the reliability, there are many studies have been conducted previously. One of them investigated the additional of 1 mm layer between liner and cement in which the stress on the layer can be reduced about 47% between the layered artificial hip joint and the non layered artificial hip joint [2]. The present study is a follow-up of previous research carried out by [2] by investigating the effect of femoral head size on the stress that occurs on the cement mantle. The femoral head sizes used in the simulation are 26 mm, 28 mm, 30 mm, 32 mm, and 34 mm in diameter. The result reveals, the larger the size of femoral head, the higher the contact stress, displacement, and von Mises stress, approximately by 10–10.3 %. Despite of the increased stress value, the artificial hip joint is still categorized safe because it is still below the yield stress of material.