Influences of Prosthesis Stem Lengths in Cementless Total Hip Arthroplasty

Abdul Halim Abdullah; Emmi Farisa Jaafar; Nursalbiah Nasir; Eli Nadia Abdul Latip; Giha Tardan

doi:10.4028/www.scientific.net/AMM.52-54.2088

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 52-54Influences of Prosthesis Stem Lengths in...

Influences of Prosthesis Stem Lengths in Cementless Total Hip Arthroplasty

Abstract:

Stress shielding phenomenon is an important issues in considering the primary stability of the cementless hip arthroplasty. Stress shielding occurs when there is a mismatch in the elastic modulus of two materials perfectly bonded to each other, such as the prosthesis stem and the bone. In this study, influences of different prosthesis stem lengths on stress distribution in cementless THA are examined using finite element method. The calculated stress distribution is discussed with respect to stress shielding and primary stability issues in THA femur cases. Results show that similar pattern in stress distribution for intact and THA femur but differs in magnitudes. The stress level increases from the neck to the middle region and peaks at locations coinciding with the tip of the prosthesis. The maximum stress for intact femur is 55.5 MPa, THA with short stem is defined up to 112 MPa, while with medium and long stem are 204 MPa and 278 MPa, respectively.

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Periodical:

Applied Mechanics and Materials (Volumes 52-54)

Pages:

2088-2093

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.52-54.2088

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Online since:

March 2011

Authors:

Abdul Halim Abdullah, Emmi Farisa Jaafar, Nursalbiah Nasir, Eli Nadia Abdul Latip, Giha Tardan

Keywords:

Finite Element Analysis (FEA), Hip Arthroplasty, Stem Lengths, Stress Variation

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