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Compressive strength of human openwedges: a selection method

Published online by Cambridge University Press:  22 December 2003

H. Follet ,
M. Gotteland ,
R. Bardonnet ,
A. M. Sfarghiu ,
J. Peyrot  and
C. Rumelhart
H. Follet*
Affiliation:
Laboratoire de Mécanique des Contacts et des Solides, INSA Lyon, Bât. Coulomb, 36 avenue des Arts, 69621 Villeurbanne Cedex, France
M. Gotteland
Affiliation:
Laboratoire de Vibrations et Acoustique, INSA Lyon, Bât. St Exupéry, 25 bis avenue J. Capelle, 69621 Villeurbanne Cedex, France
R. Bardonnet
Affiliation:
Laboratoire TBF, 7 rue Vinatier, 69500 Bron, France
A. M. Sfarghiu
Affiliation:
Laboratoire de Mécanique des Contacts et des Solides, INSA Lyon, Bât. Coulomb, 36 avenue des Arts, 69621 Villeurbanne Cedex, France
J. Peyrot
Affiliation:
Clinique St Charles, 25 rue Flesselles, 69001 Lyon, France
C. Rumelhart
Affiliation:
Laboratoire de Mécanique des Contacts et des Solides, INSA Lyon, Bât. Coulomb, 36 avenue des Arts, 69621 Villeurbanne Cedex, France
*
[email protected]
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Abstract

A series of 44 samples of bone wedges of human origin, intended for allograft openwedge osteotomy and obtained without particular precautions during hip arthroplasty were re-examined. After viral inactivity chemical treatment, lyophilisation and radio-sterilisation (intended to produce optimal health safety), the compressive strength, independent of age, sex and the height of the sample (or angle of cut), proved to be too widely dispersed [10 − 158 MPa] in the first study. We propose a method for selecting samples which takes into account their geometry (width, length, thicknesses, cortical surface area). Statistical methods (Principal Components Analysis PCA, Hierarchical Cluster Analysis, Multilinear regression) allowed final selection of 29 samples having a mean compressive strength σmax = 103 MPa ± 26 and with variation [61 − 158 MPa] . These results are equivalent or greater than average materials currently used in openwedge osteotomy.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 25 , Issue 2 , February 2004 , pp. 141 - 148
Copyright
© EDP Sciences, 2004

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