On August 31, 2007, Loyaga-Rendon, Paola G.; Takahashi, Hidekazu; Hayakawa, Iwao; Iwasaki, Naohiko published an article.Category: esters-buliding-blocks The title of the article was Compositional characteristics and hardness of acrylic and composite resin artificial teeth. And the article contained the following:
Statement of problem: New types of artificial teeth are com. available; however, evidence-based information regarding composition and properties is lacking. Purpose: The purpose of this study was to qualify the compositional characteristics and hardness of new com. available types of acrylic resin and composite resin artificial teeth. Material and methods: Twelve brands of 3 types (2 conventional acrylic resins, 3 cross-linked acrylic resins, and 7 composite resins) of artificial teeth were examined The filler geometry and composition were observed using SEM and energy disperse x-ray anal., resp. Vickers hardness was determined for each layer of the polished cross-sectioned teeth. The inorganic content of the enamel layer was determined by thermogravimetric anal. with an ash method. The swelling behavior of the artificial teeth after 12 h of Me methacrylate immersion was observed to determine the crosslinking structure. The data were statistically analyzed using 1-way anal. of variance and Tukey’s multiple comparison (α=.05). Results: Examined teeth were composed of 2, 3, or 4 layers of resin. Different sizes and shapes of filler were found but were composed only of silicon oxide. Vickers hardness ranged from 17.4 to 47.0 kgf/mm2. The inorganic content ranged from 0 to 42.8 mass%. The enamel layer of all teeth, except for 3 products, produced negligible swelling, and the base layer of all the teeth, except for 2 products, produced obvious swelling. A significant linear correlation was observed between hardness and inorganic content. Conclusions: Within the limitations of this study, differences in size, shape, distribution, and content of the silica filler and the crosslinking nature of the resin matrix were found among the com. brands of artificial teeth evaluated. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Category: esters-buliding-blocks
The Article related to artificial teeth acrylic composite resin hardness enamel silicon oxide, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Category: esters-buliding-blocks
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