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dc.contributor.authordos Santos Nunes Reis, Jose Mauricio
dc.contributor.authorEduardo Vergani, Carlos
dc.contributor.authorClaudia Pavarina, Ana
dc.contributor.authorTeresinha Giampaolo, Eunice
dc.contributor.authorLucia Machado, Ana
dc.identifier.citationJournal of Dentistry. Oxford: Elsevier B.V., v. 34, n. 7, p. 420-426, 2006.
dc.description.abstractObjectives: This study investigated the effect of relining, water storage and cyclic loading on the ultimate flexural strength (FSU) and on the flexural strength at the proportional limit (FSPl) of a denture base acrylic resin (Lucitone 550-L).Methods: Rectangular bars of L were made (64 mm x 10 mm x 2 mm) and relined (1.3 mm) with four relining resins (Kooliner-K, Ufi Gel Hard-UGH, Tokuso Rebase Fast-TR and New Truliner-NT). In addition, specimens relined with L and intact L specimens were made (64 mm x 10 mm x 3.3 mm). A three-point flexural test was applied on the specimens (n = 10) after (1) polymerization; (2) water storage (30 days); (3) cyclic loading (10,000 cycles at 5 Hz) and (4) water storage (30 days) + cyclic loading. Data (MPa) were analyzed with three-way ANOVA and Tukey's HSD tests (alpha = 0.05). To test for a possible correlation between FSU and FSPl, a linear regression coefficient 'r' was calculated.Results: After water storage, L-UGH and L-TR demonstrated an increased FSU (41.4950.64 MPa and 49.95-57.36 MPa, respectively) (P < 0.05). Only L-TR demonstrated an increased FSPl (20.58-24.21 MPa) after water storage (P < 0.05). L-L had the highest FSU (between 78.57 and 85.09 MPa) and FSPl (between 31.30 and 34.17 MPa) (P < 0.05). The cyclic loading decreased the FSU and FSPl of all materials (P < 0.05). Regression analysis showed a strong linear correlation between the two variables (r = 0.941).Conclusions: Water storage improved the FSU of L-UGH and L-TR and the FSPl of L-TR. L-L produced the highest FSU and FSPl. The FSU and FSPl of all materials were detrimentally influenced by cyclic loading.en
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of Dentistry
dc.sourceWeb of Science
dc.subjectflexural strengthpt
dc.subjectacrylic resinspt
dc.subjectwater storagept
dc.subjectcyclic loadingpt
dc.titleEffect of relining, water storage and cyclic loading on the flexural strength of a denture base acrylic resinen
dcterms.rightsHolderElsevier B.V.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.description.affiliationUNESP, Araraquara Dent Sch, Dept Dent Mat & Prosthodont, São Paulo, Brazil
dc.description.affiliationUnespUNESP, Araraquara Dent Sch, Dept Dent Mat & Prosthodont, São Paulo, Brazil
dc.rights.accessRightsAcesso restrito
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Odontologia, Araraquarapt
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