title: [Influence of mercaptan impression storage conditions on linear dimensional changes in improved plaster-stone casts].
abstract: A study was conducted on the influence of storage conditions of mercaptan molds on the linear dimensional alterations occurring in improved plaster-stone casts. Two types of storage were used: A) in which the molds were left on the bench for 5 minutes at 25 degrees C and 55% relative humidity; and B) in which the molds were placed in an incubator at 37 degrees C and 100% relative humidity for 40 minutes. Casts were built using 5 different brands of improved plaster-stone, 5 casts per brand. Thus, considering the 2 types of storage, the 5 brands of plaster-stone and the 5 replications, a total of 50 improved plaster-stone casts were constructed. The linear dimensional alterations were measured with the aid of a linear measurement microscope, which measured the space between two hemisections of the standard fixed bridge, both when the fixed bridge was adapted to the master cast and to the plaster cast.
authors.affiliation: Universidade de São Paulo.
authors.forename: W
authors.initials: W
authors.lastname: Abrão
authors.forename: R B
authors.initials: RB
authors.lastname: Roselino
authors.forename: G M
authors.initials: GM
authors.lastname: Campos
authors.forename: R F
authors.initials: RF
authors.lastname: Roselino
authors.forename: C B
authors.initials: CB
authors.lastname: Stephano
mesh_terms: D002133:Calcium Sulfate; D003760:Dental Impression Materials; D006813:Humidity; D008422:Materials Testing; D003765:Models, Dental; D012826:Silicone Elastomers; D013696:Temperature
chemical_list: D003760:Dental Impression Materials; D012826:Silicone Elastomers; D002133:Calcium Sulfate
vernacular_title: Influência da condição de armazenamento de moldes de mercaptana nas alterações dimensionais lineares ocorridas nos modelos de gesso-pedra melhorado.