Influence of abutment-to-fixture design on reliability and failure mode of all-ceramic crown systems

dc.creatorDelben, JA
dc.creatorBarao, VAR
dc.creatorFerreira, MB
dc.creatorda Silva, NRFA
dc.creatorThompson, VP
dc.creatorAssuncao, WG
dc.date2014
dc.dateAPR
dc.date2014-07-30T14:33:31Z
dc.date2015-11-26T16:33:39Z
dc.date2014-07-30T14:33:31Z
dc.date2015-11-26T16:33:39Z
dc.date.accessioned2018-03-28T23:15:37Z
dc.date.available2018-03-28T23:15:37Z
dc.identifierDental Materials. Elsevier Sci Ltd, v. 30, n. 4, n. 408, n. 416, 2014.
dc.identifier0109-5641
dc.identifier1879-0097
dc.identifierWOS:000333287700007
dc.identifier10.1016/j.dental.2014.01.005
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/60188
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/60188
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1270936
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionObjective. Evaluate the effect of implant connection designs on reliability and failure modes of screw-retained all-ceramic crowns. Methods. Central incisor ceramic crowns in zirconia abutments were screwed and torqued down to external hexagon (EH), internal hexagon (IH) and Morse taper (MT) implant systems. Single-load-to-fracture (SLF) test (n = 4 per group) determined three step-stress fatigue profiles with specimens assigned in the ratio of 3:2:1. Fatigue test was performed under water at 10 Hz. Use level probability Weibull curves and reliability for missions of 50,000 cycles at 400 N and 200 N were calculated (90% confidence bounds-CB). Weibull probability distribution (90% CB) was plotted (Weibull modulus vs characteristic strength) for comparison between the groups. Fractographic analyses were conducted under polarized-light microscopy and SEM. Results. Use level Weibull probability calculation indicated that failure was not associated with fatigue in groups EH (beta = 0.63), IH (beta = 0.97) and MT (beta = 0.19). Reliability data for a mission of 50,000 cycles at 400 N revealed significant reliability differences between groups EH (97%), IH (46%) and MT (0.5%) but no significant difference at 200 N between EH (100%) and IH (98%), and IH and MT (89%). Weibull strength distribution (figure) revealed beta = 13.1/eta = 561.8 for EH, beta = 5.8/eta = 513.4 for IH and beta = 5.3/eta = 333.2 for MT. Groups EH and IH exhibited veneer cohesive and adhesive failures. Group IH also presented adhesive failure at zirconia/titanium abutment insert while MT showed fracture at abutment neck. Significance. Although group EH presented higher reliability and characteristic strength followed by IH and MT, all groups withstood reported mean anterior loads. (C) 2014 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.
dc.description30
dc.description4
dc.description408
dc.description416
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionFAPESP [2009/11491-0, 2009/15060-3]
dc.languageen
dc.publisherElsevier Sci Ltd
dc.publisherOxford
dc.publisherInglaterra
dc.relationDental Materials
dc.relationDent. Mater.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectReliability
dc.subjectDental implants
dc.subjectZirconia
dc.subjectImplant-supported prosthesis
dc.subjectZirconia Implant Abutments
dc.subjectFinite-element-analysis
dc.subjectFracture-resistance
dc.subjectMorse-taper
dc.subjectChewing Simulation
dc.subjectTitanium Abutments
dc.subjectVeneering Ceramics
dc.subjectShear-strength
dc.subjectIn-vitro
dc.subjectY-tzp
dc.titleInfluence of abutment-to-fixture design on reliability and failure mode of all-ceramic crown systems
dc.typeArtículos de revistas


Este ítem pertenece a la siguiente institución