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. 1997 Fall;38(3):211-9.
doi: 10.1002/(sici)1097-4636(199723)38:3<211::aid-jbm5>3.0.co;2-s.

Fracture toughness of CoCr alloy-PMMA cement interface

K A Mann  1 , A A Edidin, N R Ordway, M T Manley
Affiliations

Fracture toughness of CoCr alloy-PMMA cement interface

K A Mann et al. J Biomed Mater Res. 1997 Fall.

Abstract

An unsymmetric cantilever geometry was used experimentally to determine the critical energy release rate values for cobalt chromium alloy-polymethylmethacrylate cement (CoCr alloy-PMMA) interfaces with satin finished, grit blasted, and plasma sprayed surface treatments applied to the CoCr alloy. Critical energy release rates of 0.013, 0.181, and 0.583 N/mm were found for the satin finish, grit blasted, and plasma sprayed CoCr alloy-PMMA interfaces, respectively. A finite element model of the experimental test specimen was used to determine the crack tip phase angles (-8.73 degrees to -27.1 degrees) that indicated that the tensile load applied to the specimens resulted in a tensile (mode I) and in-plane shear (mode II) loading at the crack tip. The experimental data suggest that a satin finish CoCr alloy-PMMA interface has minimal resistance to crack propagation when compared to grit blasted or plasma sprayed surface treatments.

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