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Mechanical and Fracture Behaviour Evaluation of Commercial Acrylic Bone Cements

✍ Scribed by Vallo, Claudia I.; Cuadrado, Teresita R.; Frontini, Patricia M.

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
416 KB
Volume
43
Category
Article
ISSN
0959-8103

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✦ Synopsis

The deformation and fracture behaviour of some commercial acrylic bone cements have been investigated. Cements were characterized by gel permeation chromatography, dynamic mechanical analysis and scanning electron microscopy. The inΓ‘uence of liquid to powder ratio, curing temperature, strain rate and non-reacted monomer was analysed for one radiolucent cement. Results showed that the b transition activation process inΓ‘uences both deformation and fracture behaviour. Fracture surface stress whiteness revealed the presence of crazes as the main plastic deformation mechanism. Non-reacted monomer acted as a plasticizer leading to materials with lower yield strength, that induces p y , crack tip blunting and improves toughness. It appears that the presence of radio-paciÐer Ðllers also improves fracture toughness by promoting interactions between the crack and the second phase dispersion.

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