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dc.contributor.advisorNickel, Jeffrey C. (Jeffrey Charles), 1957-eng
dc.contributor.authorDarmitzel, Stephen Edward, 1981-eng
dc.date.issued2011-08-12eng
dc.date.submitted2011 Summereng
dc.descriptionTitle from PDF of title page, viewed on August 12, 2011eng
dc.descriptionThesis advisor: Jeffrey C. Nickeleng
dc.descriptionVitaeng
dc.descriptionIncludes bibliographical references (p. 59-61)eng
dc.descriptionThesis (M.S.)--School of Dentistry. University of Missouri--Kansas City, 2011eng
dc.description.abstractThis study examined the effect of simulated oral and clinical conditions on the tie-wing fracture strength of a polycrystalline and a monocrystalline bracket. Fracture strength was measured for brackets as-received (control) and after 7- or 21-day exposure to phosphate buffered saline solution (PBS) with or without repetitive ligation. Scanning electron microscopy was used for qualitative evaluation of the fractured brackets. Based on a two-factor ANOVA and Dunnett's post hoc test ( = 0.05), monocrystalline bracket tie-wing fracture strength was significantly decreased as a function of PBS storage over time with and without ligation, while there was no significant effect on the polycrystalline bracket tie-wing fracture strength. With monocrystalline brackets, tie-wing fracture origin appeared to differ between brackets exposed to repetitive ligation and those with no ligation. The results suggest that monocrystalline bracket tie-wing fracture strength is more susceptible to degradation in the oral environment.eng
dc.description.tableofcontentsIntroduction -- Materials and Methods -- Results -- Discussion -- Conclusionseng
dc.format.extentix, 62 pageseng
dc.identifier.urihttp://hdl.handle.net/10355/11361eng
dc.publisherUniversity of Missouri--Kansas Cityeng
dc.subject.lcshOrthodontic applianceseng
dc.subject.lcshBracketseng
dc.subject.meshOrthodontic Bracketseng
dc.subject.meshLigation -- methodseng
dc.subject.otherThesis -- University of Missouri--Kansas City -- Dentistryeng
dc.titleThe effect of simulated oral and clinical conditions on the fracture strength of ceramic bracket tie-wingseng
dc.typeThesiseng
thesis.degree.disciplineOral Biology (UMKC)eng
thesis.degree.grantorUniversity of Missouri--Kansas Cityeng
thesis.degree.levelMasterseng
thesis.degree.nameM.S.eng


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