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Comparative Study
. 1995 Jun;14(1):78-83.
doi: 10.4012/dmj.14.78.

Deterioration of mechanical properties of composite resins

H Arikawa  1 , H Kuwahata, H Seki, T Kanie, K Fujii, K Inoue
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Free article
Comparative Study

Deterioration of mechanical properties of composite resins

H Arikawa et al. Dent Mater J. 1995 Jun.
Free article

Abstract

The deterioration of the mechanical properties of composite resins was examined. The bending strength and the stress relaxation rate for sixteen experimental composite resins with different filler shapes, particle sizes and filler contents immersed in distilled water for 0-60 days were measured. The bending strength of all of the composites decreased with the increase of the immersion time in water. The composites with a high filler content (65 vol%) showed a greater decreasing ratio of bending strength than those with low filler content (40 vol%). The stress relaxation rate also increased with and increase of immersion time. The phenomena may be caused by the hydrolytic degradation of the silane coupling agent (gamma-MPTMS).

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