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Influence of delayed pouring on irreversible hydrocolloid properties

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Influence of delayed pouring on irreversible hydrocolloid properties

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Título Influence of delayed pouring on irreversible hydrocolloid properties
Autor Rodrigues, Stefani Becker
Augusto, Carolina Rocha
Leitune, Vicente Castelo Branco
Samuel, Susana Maria Werner
Collares, Fabrício Mezzomo
Abstract The aim of this study was to evaluate the physical properties of irreversible hydrocolloid materials poured immediately and after different storage periods. Four alginates were tested: Color Change (Cavex); Hydrogum (Zhermack); Hydrogum 5 (Zhermack); and Hydro Print Premium (Coltene). Their physical properties, including the recovery from deformation (n = 3), compressive strength (n = 3), and detail reproduction and gypsum compatibility (n = 3), were analyzed according to ANSI/ ADA specification no. 18. Specimens were stored at 23°C and humidity and were then poured with gypsum immediately and after 1, 2, 3, 4, and 5 days. The data were analyzed by two-way analysis of variance (ANOVA) and Tukey’s test at p < 0.05. All of the alginate impression materials tested exhibited detail reproduction and gypsum compatibility at all times. Hydro Print Premium and Hydrogum 5 showed recovery from deformation, as established by ANSI/ADA specification no. 18, after 5 days of storage. As the storage time increased, the compressive strength values also increased. Considering the properties of compounds’ recovery from deformation, compressive strength, and detail reproduction and gypsum compatibility, irreversible hydrocolloids should be poured immediately.
Contido em Brazilian oral research. São Paulo. Vol. 26, no. 5 (Sept./Oct. 2012), p. 404-409
Assunto Materiais odontologicos : Impressao
Materiais odontologicos : Propriedades fisicas
[en] Calcium Sulfate
[en] Compressive Strength
[en] Dental Impression Materials
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/94859
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