Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/96915
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dc.contributor.CRUESPUNIVERSIDADE DE ESTADUAL DE CAMPINASpt_BR
dc.identifier.isbnpt
dc.typeArtigo de periódicopt_BR
dc.titleEvaluation Of The Coefficient Of Thermal Expansion Of Human And Bovine Dentin By Thermomechanical Analysispt_BR
dc.contributor.authorLopes M.B.pt_BR
dc.contributor.authorYan Z.pt_BR
dc.contributor.authorConsani S.pt_BR
dc.contributor.authorGonini Jr. A.pt_BR
dc.contributor.authorAleixo A.pt_BR
dc.contributor.authorMcCabe J.F.pt_BR
unicamp.authorConsani, S., Department of Restorative Dentistry, Piracicaba Dental School, UNICAMP - University of Campinas, Piracicaba, SP, Brazilpt_BR
unicamp.author.externalLopes, M.B., Department of Dentistry, UNOPAR - University North of Paraná, Londrina, PR, Brazilpt
unicamp.author.externalYan, Z., Dental Biomaterials, School of Dental Sciences, University of Newcastle, Newcastle upon Tyne, United Kingdompt
unicamp.author.externalGonini Jr., A., Department of Dentistry, UNOPAR - University North of Paraná, Londrina, PR, Brazilpt
unicamp.author.externalAleixo, A., Department of Dentistry, UNOPAR - University North of Paraná, Londrina, PR, Brazilpt
unicamp.author.externalMcCabe, J.F., Dental Biomaterials, School of Dental Sciences, University of Newcastle, Newcastle upon Tyne, United Kingdompt
dc.description.abstractThe mismatch of thermal expansion and contraction between restorative materials and tooth may cause stresses at their interface, which may lead to microleakage. The present work compared the coefficient of thermal expansion (CTE) with the thermomechanical behavior of human and bovine teeth and determined if the CTE is a suitable parameter to describe tooth behavior. Fifteen human third molar and 15 bovine incisor tooth slices (6×5×2 mm) were allocated to 3 groups according to the test environment: G1 - room condition, G2 - 100% humidity, G3 - desiccated and tested in dry condition. Each specimen was weighed, heated from 20 to 70°C at 10°C min -1 and reweighed. The CTE was measured between 20 and 50°C. Fresh dentin (human -0.49% ± 0.27, bovine -0.22% ± 0.16) contracted on heating under dry condition. Under wet conditions, only human teeth (-0.05% ± 0.04) showed contraction (bovine 0.00% ± 0.03) accompanied by a significantly lower (p<0.05) weight loss than in dry specimens (human 0.35% ± 0.15, bovine 0.45% ± 0.20). The desiccated dentin expanded on heating without obvious weight changes (0.00% ± 0.00). The CTE found was, respectively, in dry, wet and dissected conditions in oC -1: human (-66.03×10 -6, -6.82×10 -6, 5.52×10 -6) and bovine (-33.71×10 -6, 5.47×10 -6, 4.31×10 -6). According to its wet condition, the dentin showed different CTEs. The thermal expansion behavior of human and bovine dentin was similar. A simple evaluation of the thermal expansion behavior of tooth structure by its CTE value may not be appropriate as a meaningful consideration of the effects on the tooth-material interface.en
dc.relation.ispartofBrazilian Dental Journalpt_BR
dc.publisherpt_BR
dc.date.issued2012pt_BR
dc.identifier.citationBrazilian Dental Journal. , v. 23, n. 1, p. 3 - 7, 2012.pt_BR
dc.language.isoenpt_BR
dc.description.volume23pt_BR
dc.description.issuenumber1pt_BR
dc.description.initialpage3pt_BR
dc.description.lastpage7pt_BR
dc.rightsabertopt_BR
dc.sourceScopuspt_BR
dc.identifier.issn1036440pt_BR
dc.identifier.doipt_BR
dc.identifier.urlhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84859135866&partnerID=40&md5=66cf2bfd5ece9bc3bff945faa2b54947pt_BR
dc.date.available2015-06-26T20:29:10Z
dc.date.available2015-11-26T14:25:35Z-
dc.date.accessioned2015-06-26T20:29:10Z
dc.date.accessioned2015-11-26T14:25:35Z-
dc.description.provenanceMade available in DSpace on 2015-06-26T20:29:10Z (GMT). No. of bitstreams: 0 Previous issue date: 2012en
dc.description.provenanceMade available in DSpace on 2015-11-26T14:25:35Z (GMT). No. of bitstreams: 0 Previous issue date: 2012en
dc.identifier.urihttp://www.repositorio.unicamp.br/handle/REPOSIP/96915
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/96915-
dc.identifier.idScopus2-s2.0-84859135866pt_BR
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