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dc.contributor.advisorIwasaki, Laura, advisoreng
dc.contributor.authorGossett, Lauren Ashleyeng
dc.date.issued2012eng
dc.date.submitted2012 Summereng
dc.descriptionTitle from PDF of title page, viewed on November 5, 2012eng
dc.descriptionThesis advisors: Laura Iwasaki and Mary P. Walkereng
dc.descriptionVitaeng
dc.descriptionIncludes bibliographic references (p. 59-66)eng
dc.descriptionThesis (M.S.)--School of Dentistry. University of Missouri--Kansas City, 2012eng
dc.description.abstractThis study evaluated effects of refrigerant spray and crosshead speed on orthodontic composite resin shear debond strength and Adhesive Remnant Index (ARI) after bond failure. Orthodontic brackets were bonded to forty paired extracted mandibular third molars. Pairs were divided into experimental and control groups, with and without refrigerant spray prior to debond, respectively. Each group was further divided into two subgroups based on crosshead speed of 1 or 10 mm/min. Bracket shear debond strength was tested with a universal testing machine and ARI scores assessed. Results showed no statistically significant difference for shear debond strength or ARI score as a function of refrigerant spray usage. Statistically significant differences were shown for shear debond strength and ARI score as a function of crosshead speed. As crosshead speed increased, shear debond strength and ARI score both increased. These results indicate that application of refrigerant spray prior to bracket debonding is not beneficial.eng
dc.description.tableofcontentsIntroduction -- Materials and methods -- Results -- Discussion -- Conclusions -- -- Literature cited -- Appendix 1. IRB approval -- Appendix 2. Bracket temperature pilot data -- Appendix 3. Bracket debond time pilot data -- Appendix 4. Bracket composite layer temperature pilot dataeng
dc.format.extentx, 84 pageseng
dc.identifier.urihttp://hdl.handle.net/10355/15982eng
dc.publisherUniversity of Missouri--Kansas Cityeng
dc.subject.lcshDental cementseng
dc.subject.lcshDental bondingeng
dc.subject.meshDental Cementseng
dc.subject.meshDental Bondingeng
dc.subject.otherThesis -- University of Missouri--Kansas City -- Dentistryeng
dc.titleEffect of refrigerant spray on orthodontic composite resin-bracket debond strength and associated adhesive remnant indexeng
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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