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dc.contributor.authorBrooks, K. Glenn
dc.date.accessioned2021-01-15T21:10:30Z
dc.date.available2021-01-15T21:10:30Z
dc.date.issued1996-12
dc.identifier.urien
dc.identifier.urihttp://hdl.handle.net/10675.2/623826
dc.descriptionThe file you are attempting to access is currently restricted to Augusta University. Please log in with your NetID if off campus.
dc.description.abstractEase of bracket application, durability of enamel bond, and formation of an intact peripheral seal to maintain color stability are goals of esthetic, ceramic orthodontic bracket use. PURPOSE This research examined the effect of three different types of photo-curable resin applications to a commercial ceramic orthodontic bracket base on bond strength and potential for microleakage on bovine enamel following various periods of water storage. METH 0 D S Resin adhesive was applied to polycrystalline orthodontic brackets (Transcend 6000, 3M Unitek, Monrovia, CA) using three methods: 1) manual application of a light-curable adhesive (Transbond, 3M Unitek) to the bracket base (no resin); 2) with a coat of unfilled resin prior to adhesive placement (resin); 3) or with adhesive paste pre-applied by the manufacturer (APC Brackets, 3M'Unitek). Brackets were applied to flattened, acid-etched bovine enamel surfaces using standardized loading conditions. Bonded brackets were stored in phosphate-buffered saline at 37 degrees C for the following durations prior to testing: 1 day, 1 week, and 14 weeks. Following storage, the brackets (17 per test condition) were debonded in shear or were stored in basic fuchsin dye for 24 h prior to sectioning and examination for microleakage under stereo magnification (12 teeth per condition). RESULTS Two-way ANOVA indicated that type of adhesive resin application (p=0.0001) and duration of water storage (p=0.0063) were both significant factors on strength: resin (13.4 MPa) > APC (10.9 MPa) > no resin (9.3 MPa). Water storage decreased bond strength for all groups after 14 weeks storage. The primary debond location for all groups was the adhesive/bracket interface. APC brackets showed greatest microleakage (42%) after 14 weeks, while the other groups each leaked in 33% of specimens. The method of resin application to a ceramic bracket base is shown to affect both strength and potential for micro leakage.en_US
dc.language.isoen_USen_US
dc.publisherMedical College of Georgiaen_US
dc.rightsCopyright protected. Unauthorized reproduction or use beyond the exceptions granted by the Fair Use clause of U.S. Copyright law may violate federal law.en_US
dc.subjectCeramic Bracketen_US
dc.subjectWater Storageen_US
dc.subjectResin Applicationen_US
dc.subjectShear Bond Strengthen_US
dc.subjectMicroleakageen_US
dc.titleThe Effect of Filled Adhesive Application Method and Water Storage on the Retentive Features of a Mechanically Retained Ceramic Orthodontic Bracket to Bovine Enamelen_US
dc.typeThesisen_US
dc.contributor.departmentDepartment of Oral Biologyen_US
dc.description.advisorRueggeberg, Frederick A.
dc.description.majorMaster of Sciences in Oral Biologyen_US
dc.description.committeePashley
dc.description.committeeSchuster
dc.description.degreeM.S.en_US
dc.embargoen
refterms.dateFOA2021-01-15T21:10:30Z


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