Stress analysis of femoral stems in cementless total hip arthroplasty by two-dimensional finite element method using boundary friction layer
Oomori, H.; Imura, S.; Gesso, H.
Nihon Seikeigeka Gakkai Zasshi 66(4): 240-252
1992
ISSN/ISBN: 0021-5325 PMID: 1593196 Document Number: 399500
To develop stem design achieving primary fixation of stems and effective load transfer to the femur, we studied stress analysis of stems in cementless total hip arthroplasty by two-dimensional finite element method using boundary friction layer in stem-bone interface. The results of analyses of stem-bone interface stresses and von Mises stresses at the cortical bones indicated that ideal stem design features would be as follows: 1) Sufficient length, with the distal end extending beyond the isthmus region. 2) Maximum possible width, to contact the cortical bones in the isthmus region. 3) No collars but a lateral shoulder at the proximal portion. 4) A distal tip, to contact the cortical bones at the distal portion.