title: Effect of storage period of alginate impressions following spray with disinfectant solutions on the dimensional accuracy and deformation of stone models.
abstract: This study investigated the effect of storage period on dimensional change and deformation of stone models to determine an acceptable period of alginate impression storage in a sealed bag after spraying with disinfectant solution. Two alginate impression products: Aroma Fine DFIII and Alginoplast EM, characterized by greater or smaller contraction in 100% relative humidity, were used. The impressions were sprayed with 1% sodium hypochlorite or 2% glutaraldehyde solution and then stored in sealed bags. The storage periods were 1 hour, 2 hours, 3 hours, and 4 hours. The sectional profiles of the stone models obtained from each impression were measured using a three-dimensional coordinate measuring system. The results indicated that the impression characterized by greater contraction in 100% relative humidity should not be stored for even 1 hour, and that storage for up to 3 hours of the impression characterized by smaller contraction was clinically acceptable.
authors.affiliation: Department of Dental Materials, Nihon University School of Dentistry, Tokyo, Japan. hiraguchi@dent.nihon-u.ac.jp
authors.forename: Hisako
authors.initials: H
authors.lastname: Hiraguchi
authors.forename: Hisami
authors.initials: H
authors.lastname: Nakagawa
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Wakashima
authors.forename: Kohichi
authors.initials: K
authors.lastname: Miyanaga
authors.forename: Setsuko
authors.initials: S
authors.lastname: Sakaguchi
authors.forename: Minoru
authors.initials: M
authors.lastname: Nishiyama
mesh_terms: D000464:Alginates / Q000737:chemistry; D002133:Calcium Sulfate; D019551:Dental Disinfectants; D003760:Dental Impression Materials / Q000737:chemistry; D003799:Dental Stress Analysis; D004356:Drug Storage; D005976:Glutaral; D006813:Humidity; D008422:Materials Testing; D003765:Models, Dental; D012973:Sodium Hypochlorite; D018709:Statistics, Nonparametric
chemical_list: D000464:Alginates; D019551:Dental Disinfectants; D003760:Dental Impression Materials; D012973:Sodium Hypochlorite; D005976:Glutaral; D002133:Calcium Sulfate