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Type: Artigo de periódico
Title: Effect Of Packing Types On The Dimensional Accuracy Of Denture Base Resin Cured By The Conventional Cycle In Relation To Post-pressing Times.
Author: Consani, Rafael Leonardo Xediek
Domitti, Saide Sarckis
Mesquita, Marcelo Ferraz
Consani, Simonides
Abstract: This study investigated the dimensional stability of denture bases influenced by packing methods, in relation to post-pressing times, in the Clássico acrylic resin which was prepared according to manufacturer recommendations. Forty maxillary wax bases were made and randomly assigned into 2 groups of 20 specimens each according to the conventional and RS system packing methods. In each method, the specimens were subdivided into immediate, 6, 12 and 24 h post-pressing times. The dough of the acrylic resin was packed in metallic flasks and processed in a water bath curing cycle at 74 masculine C for 9 h. After cooling at room temperature, the bases were removed from the flasks, finished and fixed on stone casts with instantaneous adhesive. The resin base-stone cast sets were transversally sectioned into 3 sections and the base-stone gap measured at 5 points in each section. The data were submitted to ANOVA and Tukey's test, which showed that the RS system had a smaller base distortion compared to conventional packing, with the exception of the 24-h post-pressing time. There was a statistically significant difference between the packing methods only in section C (posterior palatal zone). In the conventional packing method, the immediate and 6 h times demonstrated values with no statistically significant difference between them, as well as between the 12 and 24 h post-pressing times.
Subject: Acrylic Resins
Dental Casting Technique
Dental Materials
Dental Models
Dental Polishing
Denture Bases
Materials Testing
Polymethyl Methacrylate
Surface Properties
Time Factors
Citation: Brazilian Dental Journal. v. 15, n. 1, p. 63-7, 2004.
Rights: fechado
Identifier DOI: /S0103-64402004000100012
Date Issue: 2004
Appears in Collections:Unicamp - Artigos e Outros Documentos

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