title: Effects of immersion disinfection of agar-alginate combined impressions on the surface properties of stone casts.
abstract: This study investigated the effects of disinfection of agar-alginate combined impressions on the surface properties of the resulting stone casts. Two brands of cartridge-form agar impression material and one alginate impression material were used. Agar-alginate combined impressions of smooth glass plates were prepared. The impressions were immersed in 0.55% ortho-phthalaldehyde solution or 0.5% sodium hypochlorite solution for 1, 3, 5 and 10 min. A stone cast made with an impression that had not been immersed was prepared as a control. The surface roughness (Ra) of the stone casts was measured, and the cast surfaces were observed by SEM. Immersion of agar-alginate combined impressions in 0.5% sodium hypochlorite solution for up to 10 min had no serious adverse effects on the surface properties of the stone casts. In contrast, even 1 min of immersion in 0.55% ortho-phthalaldehyde solution caused deterioration of the cast surface properties.
authors: Department of Dental Materials, Nihon University School of Dentistry.
authors: Yukiko
authors: Y
authors: Iwasaki
authors: Hisako
authors: H
authors: Hiraguchi
authors: Eriko
authors: E
authors: Iwasaki
authors: Takayuki
authors: T
authors: Yoneyama
mesh_terms: D000362:Agar; D000464:Alginates; D019551:Dental Disinfectants / Q000494:pharmacology*; D003760:Dental Impression Materials / Q000737:chemistry*; D004203:Disinfection / Q000379:methods*; D020723:Glucuronic Acid; D006603:Hexuronic Acids; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D003765:Models, Dental; D012973:Sodium Hypochlorite / Q000494:pharmacology*; D013499:Surface Properties; D009764:o-Phthalaldehyde / Q000494:pharmacology*
chemical_list: D000464:Alginates; D019551:Dental Disinfectants; D003760:Dental Impression Materials; D006603:Hexuronic Acids; D009764:o-Phthalaldehyde; D020723:Glucuronic Acid; D000362:Agar; D012973:Sodium Hypochlorite