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Long-term compressive creep deformation and damage in acrylic bone cements

✍ Scribed by Chwirut, Daniel J.

Publisher: John Wiley and Sons
Year: 1984
Tongue: English
Weight: 710 KB
Volume: 18
Category: Article
ISSN: 0021-9304
DOI: 10.1002/jbm.820180105

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✦ Synopsis

Compressive creep tests were performed on five commercially available acrylic bone cements under conditions simulating in vivo usage. Measured creep strains are quite large, generally exceeding elastic strains. Large variations in creep response were noted among the various cements, with a carbon-reinforced cement by far the most resistant to creep. The empirical model E = a exp(bo)t" was found to predict creep strains within about 10% of the measured values. Microscopic examination of some specimens after testing revealed significant cracking, resulting from long-term loading, that could be a contributing cause of timedependent failure.

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