European Journal of Prosthodontics and Restorative Dentistry

Polymerization Eficiency of Dual-polymerized Resin Cements Light- Irradiated Through Ceramics and Laboratory-processed Resin Composite

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Cover Date

March 2008

Print ISSN

0965-7452

Vol

16

Issue

1

Abstract

This study was partially presented at the IADR meeting Gothenburg, Sweden, June 2003. Supported from an institutional grant from the University of Athens (ELKE No 70/4/6458)

Abstract - The purpose of the study was to determine the influence of light-irradiation through two ceramic and one resin composite materials on the degree of remaining double carbon bonds in 3 dual-polymerized resin cements. After mixing, the cement was inserted into a 0.5mm deep recess in a silicon mold, covered with one ceramic or resin composite rectangular block and exposed through the block with the light from a halogen polymerization unit for 40s. Infrared spectroscopic analysis was used to record the degree of remaining double carbon bonds. Light irradiation through 2 mm–thick ceramic and resin composite materials increased the degree of remaining double carbon bonds relative to the direct photopolymerization analogues.

KEY WORDS: Dual-polymerized, Resin cements, Polymerization efficiency, Remaining double bonds