光重合型硬質レジンの重合性に関する研究 : 第1報重合条件の影響について

概要

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With a view to investigate the effects of curing conditions of monomers on the properties of visible-light cured veneering resin, triethylene glycol dimethacrylate (TEGDMA) and di (methacryloxyethyl) trimethylhexamethylene diurethane (UDMA) were photo-polymerized and Knoop hardness numbers and amount of eluted monomers were measured. Properties of the polymers were evaluated with various irradiation times and temperatures. Maximum Knoop hardness number of the photo-polymerized resin was obtaind at an area of 0.5 mm depth from the surface with gradual decrease in hardness at the deep area. Curing behavior of TEGDMA was different from that of UDMA. Hardness number of the latter polymer being scarcely influenced with the depth, that of the former polymer gradually decreased with increase in depth. TEGDMA-UDMA copolymers showed nearly the same characters as UDMA homopolymer. TEGDMA being polymerized uniformly by heating except for surface area, hardness numberat 0.5mm depth obtained from heating after photo-curing was superior to that obtained from heating.Conversion of TEGDMA, which was not cured uniformly, showed higher value than that of UDMA. Clinically acceptable polymers with excellent properties could be obtained by heating afterextended irradiation.
日本補綴歯科学会の論文
1988-06-01