A two dimensional finite element model is employed for the study of the effect of changing the bone cement thickness in total hip prostheses.
The thickness of cement taken as variable are 1,2,3,4 and 5mm, and three load directions of 0, 22.5 and 45 degrees with respect to the longitudinal axis of the femur are studied. A reasonably stiff support can be achieved when the thickness of cement layer between bone and stem is minimized. But fragmentation of cement happens in a thin layer of cement.
The finite element stress analysis shows that maximum tensile stress in stem is increased as the layer of cement thicken, while the stress in cement is decreased. From the comparison of stress distributions with various cement thickness, a thickness of cement layer between 3 and 4 mm is recommended.
인공 고관절의 고정에 사용되고 있는 세멘트의 두께에 따른 응력을 유한 요소법을 사용해서 구했다. 인공 고관절이 주입된 모양을 이차원으로 가정하여 고관절의 머리에 집중 하중이 세가지 방향으로 작용하는 외팔보로 모델을 잡았다.
세멘트의 두께를 1 mm 에서 5mm 까지 다섯 가지로 나누어 응력을 구해 본결과 3 - 4 mm 두께 일때가 적당함을 알았다.
