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

fYear

1995

fDate

15-18 Feb 1995

Firstpage

42444

Lastpage

42445

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/RCEMBS.1995.532954

Filename

532954