Effect of ultrasonic instrumentation on the bond strength of crowns cemented with zinc phosphate cement to natural teeth. An in vitro study

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorde Melo Filho, Antonio Braulino
dc.creatorMori, Matsuyoshi
dc.creatorJardini, Maria Aparecida Neves
dc.creatorLandim, Karine Tenório
dc.creatorSolis, Ana Cristina de Oliveira
dc.date2014-05-27T11:23:44Z
dc.date2016-10-25T18:26:21Z
dc.date2014-05-27T11:23:44Z
dc.date2016-10-25T18:26:21Z
dc.date2008-12-01
dc.date.accessioned2017-04-06T01:33:40Z
dc.date.available2017-04-06T01:33:40Z
dc.identifierBrazilian Oral Research, v. 22, n. 3, p. 270-274, 2008.
dc.identifier1806-8324
dc.identifier1807-3107
dc.identifierhttp://hdl.handle.net/11449/70720
dc.identifierhttp://acervodigital.unesp.br/handle/11449/70720
dc.identifier10.1590/S1806-83242008000300014
dc.identifierS1806-83242008000300014
dc.identifier2-s2.0-60649120799.pdf
dc.identifier2-s2.0-60649120799
dc.identifierhttp://dx.doi.org/10.1590/S1806-83242008000300014
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/891788
dc.descriptionSeveral studies have reported the benefits of sonic and/or ultrasonic instrumentation for root debridement, with most of them focusing on changes in periodontal clinical parameters. The present study investigated possible alterations in the tensile bond strength of crowns cemented with zinc phosphate cement to natural teeth after ultrasonic instrumentation. Forty recently extracted intact human third molars were selected, cleaned and stored in physiologic serum at 4°C. They received standard preparations, at a 16° convergence angle, and AgPd alloy crowns. The crowns were cemented with zinc phosphate cement and then divided into four groups of 10 teeth each. Each group was then subdivided into two subgroups, with one of the subgroups being submitted to 5,000 thermal cycles ranging from 55 ± 2 to 5 ± 2°C, while the other was not. Each group was submitted to ultrasonic instrumentation for different periods of time: group 1 - 0 min (control), group 2 - 5 min, group 3 - 10 min, and group 4 - 15 min. Tensile bond strength tests were performed with an Instron testing machine (model 4310). Statistical analysis was performed using ANOVA and Tukey's test at the 5% level of significance. A significant reduction in the tensile bond strength of crowns cemented with zinc phosphate and submitted to thermal cycles was observed at 15 min (196.75 N versus 0 min = 452.01 N, 5 min = 444.23 N and 10 min = 470.85 N). Thermal cycling and ultrasonic instrumentation for 15 min caused a significant reduction in tensile bond strength (p < .05).
dc.languageeng
dc.relationBrazilian Oral Research
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectTensile strength
dc.subjectTooth crown
dc.subjectUltrasonic therapy
dc.subjectZinc phosphate cement
dc.subjectzinc phosphate
dc.subjectanalysis of variance
dc.subjectcementation
dc.subjectchemistry
dc.subjectdebridement
dc.subjectechography
dc.subjectendodontics
dc.subjecthuman
dc.subjectinstrumentation
dc.subjectmaterials testing
dc.subjectmethodology
dc.subjectsurface property
dc.subjecttensile strength
dc.subjecttime
dc.subjecttooth crown
dc.subjectultrasound therapy
dc.subjectAnalysis of Variance
dc.subjectCementation
dc.subjectDebridement
dc.subjectHumans
dc.subjectMaterials Testing
dc.subjectRoot Canal Therapy
dc.subjectSurface Properties
dc.subjectTensile Strength
dc.subjectTime Factors
dc.subjectTooth Crown
dc.subjectUltrasonic Therapy
dc.subjectZinc Phosphate Cement
dc.titleEffect of ultrasonic instrumentation on the bond strength of crowns cemented with zinc phosphate cement to natural teeth. An in vitro study
dc.typeOtro


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