(Golden Gate ATR) AN21-06: Study of Polymerization Kinetics of Dental Materials using the Golden Gate® ATR

Investigate chemical composition of dental bonding systems and to assess their photolytic polymerization kinetics using the Golden Gate ATR.

Dental composites are a suspension of inorganic glass particles in a polymerisable organic matrix of monomethacrylate and dimethacrylate monomers such as Bis-GMA, TEGDMA, UDMA and HEMA [1]. In order to bond to dental tissues, these materials require dental bonding systems. Bonding systems are also made up of resin monomers and may contain fillers.

These are generally hydrophilic/hydrophobic, solvated monomeric mixtures which may come in separate bottles or together in a single bottle [2]. Such materials polymerise via a free-radical addition polymerisation reaction, where a vinyl carbon-to-carbon double bond is broken into a single bond [3]. This reaction is generally activated by visible blue light, as they have a photoinitiation system within their composition. To characterize these materials, ATR-FTIR techniques are commonly used and are preferred over alternatives [4-6].

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