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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
biochemistry, genetics and molecular biology
Contact stresses in a patient-specific unicompartmental knee replacement
Clinical Biomechanics, Volume 26, No. 2, Year 2011
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Description
Background: Unicompartmental knee replacement has gained popularity in recent times, showing improved success rates. The main reasons for the failure of unicompartmental knee replacement are the wear of the polyethylene bearing, aseptic loosening and wear in the opposite compartment. The contact stresses involved are significant contributing factors to these causes of failure. Methods: In this study, a patient-specific unicompartmental knee replacement is proposed using a methodology based on neural network modeling of a database of healthy knee geometries. This custom implant was then compared to two conventional implant designs in terms of contact stress in a validated finite element model. Findings: The custom implant experienced lower contact stresses at the tibio-femoral joint compared to a fixed-bearing design and also displayed more uniform stress distribution at the bone-implant interface than any of the other implant designs. Interpretation: Custom unicompartmental knee replacements therefore have the potential of providing good contact stress distribution, preserve bone stock and could be more anatomically accurate. © 2010 Elsevier Ltd. All rights reserved.
Authors & Co-Authors
Vandenheever, David
South Africa, Stellenbosch
Stellenbosch University
Scheffer, Cornie
South Africa, Stellenbosch
Stellenbosch University
Erasmus, Pieter J.
South Africa, Stellenbosch
Mediclinic Stellenbosch
Dillon, Edwin Mark
South Africa, Stellenbosch
Stellenbosch University
Statistics
Citations: 19
Authors: 4
Affiliations: 2
Identifiers
Doi:
10.1016/j.clinbiomech.2010.09.007
ISSN:
02680033
Research Areas
Health System And Policy