Title :
Geometric effect of stem on stress distribution and prosthesis failure
Author :
Ahmadian, M.T. ; Savadkouhi, D.G. ; Sheikhzeinoddin, H.R.
Author_Institution :
Sch. of Mech. Eng., Sharif Univ. of Technol., Tehran, Iran
Abstract :
The geometry of the stem in a femoral prosthesis plays an important role in stress distribution and the rate of osteoporosis. Using the finite element method the geometrical effect of a femoral prosthesis on stress distribution in bone, cement and lateral edge of stem are obtained. Stress distribution in bone is a highly dependent on the curvature and length of the stem. Some models are considered for each factor. Using several models in implementing the load these effects are calculated. Results indicate that larger curvature and length causes uniform stress distribution in bone, and ultimately higher reliability
Keywords :
biomechanics; bone; finite element analysis; geometry; physiological models; prosthetics; stress effects; cement; femoral prosthesis; finite element method; mechanical load; osteoporosis rate; prosthesis failure; stem curvature; stem geometric effect; stem lateral edge; stem length; stress distribution; Building materials; Cancellous bone; Elasticity; Fatigue; Geometry; Materials science and technology; Mechanical engineering; Prosthetics; Steel; Stress;
Conference_Titel :
Engineering in Medicine and Biology Society, 1995 and 14th Conference of the Biomedical Engineering Society of India. An International Meeting, Proceedings of the First Regional Conference., IEEE
Conference_Location :
New Delhi
Print_ISBN :
0-7803-2711-X
DOI :
10.1109/RCEMBS.1995.532954
