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The use of complementary non-destructive evaluation methods to evaluate the integrity of the cement–bone interface

By S-Y Leung, A.M.R. New and M. Browne


The integrity of the cement–bone interface is vital to the long-term stability of<br/>cemented hip arthroplasty. Most of the previous studies investigating the interface have been<br/>confined to the continuum level, neglecting the effects of microstructure. Microscopic damage<br/>at the interface may eventually lead to macroscopic loosening of the implant. However, since<br/>the strength of the interface depends on the interlock of the cement with bone and since the<br/>properties of cancellous bone depend on its microstructure, the study of the behaviour of the<br/>interface at the microstructural level may help an understanding of the factors governing<br/>initiation of loosening to be gained. In this study, two complementary non-destructive<br/>methods, acoustic emission (AE) and computed tomography (CT), have been implemented to<br/>study the initiation and progression of damage of an analogue cement–bone interface sample<br/>under four-point bending. Early failure was detected, localized, and characterized using AE. CT<br/>images of the sample before and after loading were used to visualize damage in three<br/>dimensions. Damage initiated at the interface and was found to be related to stress-raising<br/>microstructural features in the cement. These were caused by irregularities in the geometry of<br/>the bone analogue and recesses and notches formed by the flow of cement

Topics: Q1
Year: 2008
OAI identifier: oai:eprints.soton.ac.uk:143235
Provided by: e-Prints Soton
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