Residual monomer (Bis‐GMA) of composite resins

Abstract

A method of measuring residual monomer (Bis-GMA) is described. In addition, the percentage of residual monomer eluted into water from composite resins after setting was compared for several commercial products.

Identification and quantification of monomers released from dental composites using HPLC

“…Despite of being considered highly stable structures, dental composites are susceptible to degradation (Geurtsen, 1998) due to the incomplete polymerization and the influence of the aqueous oral environment (Oysaed and Ruyter, 1986). When a composite material is immersed in water, some of the components, such as unreacted monomers (Inoue and Hayashi, 1982;Oysaed et al, 1988;Tanaka et al, 1991;Ferracane, 1994;Örtengren et al, 2001), filler particles (Söderholm, 1983) and other components (Lygre et al, 1999) are leached out of the material. This can be assessed as solubility or leaching.…”

In Vitro Analysis of AHPlus and MM-Seal by ESR and Thermoanalytical Methods

“…In vitro methods have been recommended by the American National Standards Institute, the American Dental Association [15] for evaluation of the cytotoxicity of endodontic materials. For biomedical applications using new polymeric composite materials, it is significant to know quantively the amount of residual monomer release from the surface of the polymerized composite, because of the likely harmful effects of residual monomers on tissues [16][17][18][19][20][21][22][23][24][25]. It is well known that oxygen presence inhibits free radical polymerization of monomers of the resin.…”

Monomer conversion of composite dental resins photoactivated by a halogen lamp and a LED: a FT-Raman spectroscopy study

“…In addition to the unreacted monomer, additional unreacted structures may be present, from diluent such as triethyleneglycol dimethacrylate (TEGDMA) or similar substances. These unreacted components may be released from the filling, resulting in local tissue irritation and possibly an increased microleakage, which may lead, to recurrent caries and pulp irritation 4 . The most common curing device used to polymerize composite resins is the Halogen lamp emitting radiation in the deep blue region spectrum 5 .…”