Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/329955
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dc.contributor.CRUESPUNIVERSIDADE DE ESTADUAL DE CAMPINASpt_BR
dc.contributor.authoremailaltair@unicamp.brpt_BR
dc.typeArtigopt_BR
dc.titleFracture Load And Phase Transformation Of Monolithic Zirconia Crowns Submitted To Different Aging Protocolsen
dc.contributor.authorBergamopt_BR
dc.contributor.authorE. T. P.; da Silvapt_BR
dc.contributor.authorW. J.; Cesarpt_BR
dc.contributor.authorP. F.; Del Bel Curypt_BR
dc.contributor.authorA. A.pt_BR
unicamp.authorDel Bel Cury, A. A.] Univ Estadual Campinas, Dept Prosthodont & Periodontol, Piracicaba Dent Sch, Sao Paulo, Brazilpt_BR
unicamp.author.external[Bergamo, E. T. P.pt_BR
unicamp.author.externalda Silva, W. J.pt_BR
unicamp.author.external[Cesar, P. F.] Univ Sao Paulo, Sch Dent, Dept Dent Mat & Oral Biol, Sao Paulo, Brazilpt_BR
dc.subjectAll-ceramic Crownsen
dc.subjectY-tzpen
dc.subjectIn-vitroen
dc.subjectMechanical-propertiesen
dc.subjectBearing Capacityen
dc.subjectDental Bridgesen
dc.subjectSingle Crownsen
dc.subjectDegradationen
dc.subjectFatigueen
dc.subjectTranslucenten
dc.description.abstractMonolithic zirconia crowns have many favorable properties and may potentially be used to solve dental problems such as chipping. However, monolithic zirconia crown resistance can be affected by its phase transformation when subjected to low temperatures, humidity, and stress. This study evaluated the fracture load and phase transformation of monolithic zirconia crowns submitted to different thermal and mechanical aging tests. Seventy monolithic zirconia crowns were randomly divided into the following five groups: control, no treatment; hydrothermal aging at 1228 degrees C, two bar for one hour; thermal fatigue, 10(4) cycles between 58 degrees C and 558 degrees C, dwell time, 30 seconds; and mechanical fatigue, 10(6) cycles with a load of 70 N, sliding of 1.5 mm at 1.4 Hz; and combination of mechanical plus thermal fatigue. Fracture load was measured with a universal testing machine. Surface changes and fracture mode and origin were examined with a scanning electron microscope. Monoclinic phase content was evaluated by x-ray diffraction. The fracture load was analyzed using one-way analysis of variance at a level of 5%, and Weibull distribution was performed. No statistically significant differences were observed in the mean fracture load and characteristic fracture load among the groups (p>0.05). The Weibull modulus ranged from 6.2 to 16.6. The failure mode was similar for all groups with the crack origin located at the contact point of the indenter. Phase transformation was shown at different surfaces of the crown in all groups (1.9% to 8.9%). In conclusion, monolithic zirconia crowns possess high fracture load, structural reliability, and low phase transformation.en
dc.relation.ispartofOperative Dentistrypt_BR
dc.publisherOperative Dentistry INCpt_BR
dc.publisherIndianapolispt_BR
dc.date.issued2016pt_BR
dc.date.monthofcirculationset-outpt_BR
dc.identifier.citationOperative Dentistry. Operative Dentistry Inc, v. 41, p. E118 - E130, 2016.pt_BR
dc.language.isoEnglishpt_BR
dc.description.volume41pt_BR
dc.description.issuenumber5pt_BR
dc.description.firstpageE118pt_BR
dc.description.lastpageE130pt_BR
dc.rightsfechadopt_BR
dc.sourceWOSpt_BR
dc.identifier.issn0361-7734pt_BR
dc.identifier.eissn1559-2863pt_BR
dc.identifier.wosidWOS:000386153800011pt_BR
dc.identifier.doi10.2341/15-154-Lpt_BR
dc.identifier.urlhttp://www.jopdentonline.org/doi/abs/10.2341/15-154-Lpt_BR
dc.description.sponsorshipCAPES [AUX-PE-PROEX 1778/2014]pt_BR
dc.description.sponsorship1Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)pt_BR
dc.date.available2017-11-13T13:56:53Z-
dc.date.accessioned2017-11-13T13:56:53Z-
dc.description.provenanceMade available in DSpace on 2017-11-13T13:56:53Z (GMT). No. of bitstreams: 1 000386153800011.pdf: 2018299 bytes, checksum: 69fc2a68ff1b57dae871db673d4a77c6 (MD5) Previous issue date: 2016en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/329955-
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