Document Detail

Influence of delayed pouring on irreversible hydrocolloid properties.
MedLine Citation:
PMID:  23018227     Owner:  NLM     Status:  In-Data-Review    
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 23ºC 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.
Stéfani Becker Rodrigues; Carolina Rocha Augusto; Vicente Castelo Branco Leitune; Susana Maria Werner Samuel; Fabrício Mezzomo Collares
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Brazilian oral research     Volume:  26     ISSN:  1807-3107     ISO Abbreviation:  Braz Oral Res     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-09-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101307187     Medline TA:  Braz Oral Res     Country:  Brazil    
Other Details:
Languages:  eng     Pagination:  404-9     Citation Subset:  D; IM    
Dental Materials Laboratory, School of Dentistry, Univ Federal do Rio Grande do Sul - UFRGS, Porto Alegre, RS, Brazil.
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