Marginal fit of nickel-chromium copings before and after internal adjustments with duplicated stone dies and disclosing agent.

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorUshiwata, O.
dc.creatorde Moraes, J. V.
dc.creatorBottino, M. A.
dc.creatorda Silva, E. G.
dc.date2014-05-27T11:19:54Z
dc.date2016-10-25T18:16:24Z
dc.date2014-05-27T11:19:54Z
dc.date2016-10-25T18:16:24Z
dc.date2000-06-01
dc.date.accessioned2017-04-06T00:57:01Z
dc.date.available2017-04-06T00:57:01Z
dc.identifierThe Journal of prosthetic dentistry, v. 83, n. 6, p. 634-643, 2000.
dc.identifier0022-3913
dc.identifierhttp://hdl.handle.net/11449/66161
dc.identifierhttp://acervodigital.unesp.br/handle/11449/66161
dc.identifier10.1016/S0022-3913(00)70062-X
dc.identifier2-s2.0-0034199842
dc.identifierhttp://dx.doi.org/10.1016/S0022-3913(00)70062-X
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/887784
dc.descriptionSTATEMENT OF PROBLEM: Despite careful procedures, master stone dies may be damaged during laboratory procedures. The dentist routinely adjusts castings because the marginal fit of casting is not as accurate as on the dies. PURPOSE: This study evaluated the technique of internal adjustment of castings with use of duplicated stone dies and a disclosing agent to improve marginal fit discrepancy. MATERIAL AND METHODS: Thirty-two nickel-chromium copings were fabricated and simulated standard clinical and laboratory procedures with 2 variables: tooth preparation convergence angles of 6 and 18 degrees, with or without internal relief. Master stone dies and their duplicates were selected for coping construction and internal adjustment, respectively. A specimen positioning device was coupled with a Toolmakers microscope to allow reproducibility of measurements. Each coping was evaluated at 8 locations of its marginal perimeter, before and after internal adjustment. RESULTS: Marginal fit discrepancy of copings were significantly reduced with an internal adjustment technique (mean > 52%) for all experimental groups. Tooth preparations with greater convergence and internally relieved castings recorded a better marginal fit. CONCLUSION: The casting internal adjustment technique with use of duplicated stone dies and a disclosing agent substantially reduced marginal fit discrepancy.
dc.languageeng
dc.relationThe Journal of prosthetic dentistry
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectcalcium sulfate
dc.subjectchromium derivative
dc.subjectcoloring agent
dc.subjectdiagnostic agent
dc.subjectanalysis of variance
dc.subjectchemistry
dc.subjectcomparative study
dc.subjectdental care
dc.subjectdental impression
dc.subjectdenture
dc.subjectendodontics
dc.subjecthuman
dc.subjectin vitro study
dc.subjectstatistics
dc.subjecttooth crown
dc.subjectAnalysis of Variance
dc.subjectCalcium Sulfate
dc.subjectChromium Alloys
dc.subjectColoring Agents
dc.subjectCrowns
dc.subjectDental Abutments
dc.subjectDental Casting Technique
dc.subjectDental Impression Technique
dc.subjectDental Models
dc.subjectHumans
dc.subjectMarginal Adaptation (Dentistry)
dc.titleMarginal fit of nickel-chromium copings before and after internal adjustments with duplicated stone dies and disclosing agent.
dc.typeOtro


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