Photocurable Bonding Liner for Teeth Part IV. DSC Analysis of Photopolymerization

Abstract

The photopolymerization of a photocurable bonding liner was analyzed by DSC. The influence of amines and 4-MET on photopolymerization of the liner was qualitatively evaluated. 1. N-phenylglycine (NPG) acts as a reducing agent and it is more effective in an acidic condition. 2. Combination of N, N-dimethylaminobenzene derivatives with 4-MET promotes the rate of photopolymerization of the liner. 3. Combination of aliphatic tertiary amine with 4-MET delays the rate of photopolymerization of the liner. 4. Effect of aromatic and aliphatic amine hydrochlorides as a reducing agent is not observed on the photopolymerization. 5. Pretreatment with an EDTA solution which contains Fe³⁺ improves the tensile bond strength to bovine dentin, but addition of excess Fe³⁺ to the liner inhibits the photopolymerization.