Microwave-cured Acrylic Resins And Silicone-gypsum Moulding Technique.

dc.creatorDel Bel Cury, A A
dc.creatorRached, R N
dc.creatorGanzarolli, S M
dc.date2001-May
dc.date2015-11-27T12:29:17Z
dc.date2015-11-27T12:29:17Z
dc.date.accessioned2018-03-29T00:55:59Z
dc.date.available2018-03-29T00:55:59Z
dc.identifierJournal Of Oral Rehabilitation. v. 28, n. 5, p. 433-8, 2001-May.
dc.identifier0305-182X
dc.identifier
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/11380783
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/195010
dc.identifier11380783
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1295243
dc.descriptionThis study evaluated the residual monomer (RM), Knoop hardness (KHN) and transverse strength (TS) of two microwave-cured acrylic resins (Acron MC(R) (A), GC Dent. Ind. Corp., Tokyo, Japan and Onda Cryl (O), AO Classico Ltda, São Paulo, Brazil) when processed with an all-type III gypsum moulding technique (G) or a silicone-gypsum moulding technique (S). One hundred and forty four specimens were fabricated and equally distributed into four groups (AG, AS, OG and OS). The TS tests were conducted after 48 h of water storage, and KHN values were obtained after 24, 48, 72 h and 30 days. The RM was determined every 24 or 48 h over a period of 288 h. The acrylic resins were prepared and processed according to the manufacturer's directions. Both AS and OS showed the highest means (P < 0.05) for RM (microg cm-2) only after 24 h (AS = 56.84 +/- 27.39/AG = 7.51 +/- 5.75/OS = 3.59 +/- 1.60/OG = 1.02 +/- 0.3), 48 h (AS = 28.99 +/- 9.35/AG = 2.65 +/- 2.17/OS = 2.37 +/- 0.84/OG = 0.68 +/- 0.49) and 72 h (AS = 15.98 +/- 9.01/AG = 1.40 +/- 0.57/OS = 1.87 +/- 0.52/OG = 0.75 +/- 0.44). Both AS and OS showed the highest means (P < 0.02) for KH after 24 h (AS = 18.69 +/- 2.3/AG = 17.79 +/- 0.7/OS = 18.41 +/- 1.0/OG = 16.04 +/- 0.6). After 48 h the mean values for OS and OG differed significantly (P < 0.03) (OS = 18.67 +/- 0.8/OG = 16.75 +/- 0.8). No differences of KHN were found among the groups during the storage periods. The TS values for A and O were not affected by either G or S (P > 0.05). Silicone-gypsum mould technique affected the RM and KHN of the resins in the first 2 and 5 days of analysis, respectively. The type of mould did not affect TS, and the acrylic resins differed from each other for all properties regardless of the type of mould.
dc.description28
dc.description433-8
dc.languageeng
dc.relationJournal Of Oral Rehabilitation
dc.relationJ Oral Rehabil
dc.rightsfechado
dc.rights
dc.sourcePubMed
dc.subjectAcrylic Resins
dc.subjectAnalysis Of Variance
dc.subjectCalcium Sulfate
dc.subjectConfidence Intervals
dc.subjectDental Casting Investment
dc.subjectDental Casting Technique
dc.subjectDental Materials
dc.subjectDental Models
dc.subjectDental Polishing
dc.subjectDental Stress Analysis
dc.subjectHardness
dc.subjectHumans
dc.subjectImmersion
dc.subjectMaterials Testing
dc.subjectMethylmethacrylate
dc.subjectMethylmethacrylates
dc.subjectMicrowaves
dc.subjectPolymethyl Methacrylate
dc.subjectSilicones
dc.subjectStatistics As Topic
dc.subjectStress, Mechanical
dc.subjectTime Factors
dc.subjectWater
dc.titleMicrowave-cured Acrylic Resins And Silicone-gypsum Moulding Technique.
dc.typeArtículos de revistas


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