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dc.contributor.authorFacciolo, Josephen_US
dc.date.accessioned2018-01-23T16:10:16Z
dc.date.available2018-01-23T16:10:16Z
dc.date.issued2017
dc.identifier.urihttps://hdl.handle.net/2144/26243
dc.description.abstractINTRODUCTION: Utilization of rapid maxillary expansion (RME) is common for the correction of sagittal discrepancies in orthodontic treatment. RME appliances will transmit a compressive force to the periodontal support structures. This resultant force can lead to resorption of the dento-alveolar structures leading to unwanted dental movements. The purpose of this retrospective study was to compare changes from a periodontal and root resorption perspective by means of computer tomography with tooth-borne and bonded expanders. METHODS: The sample comprised of cone beam computed tomography and spiral CT images of 41 subjects, 12 to 17 years old, with unilateral or bilateral posterior crossbites. 20 subjects treated previously with a bonded expander and 21 with a banded expander. Pre and post-treatment images were digitized and landmarks were identified to measure buccal and lingual cortex thickness, alveolar height, root length and angulation by means of a computerized method. RESULTS: RME with banded and bonded expanders have similar effects from periodontal and root resorption perspectives. Changes include increasing thickness of lingual alveolar bone 0.2 to 0.7 mm, decreases in buccal bone width 0.1 to 0.5 mm; and decreases in alveolar height 0.1 to 0.9 mm and root length 0.3 to 1.0mm of each support teeth. CONCLUSIONS: RME with banded and bonded expanders exhibited similar changes post-expansion and these variables should not play a role in selection of the type of device.en_US
dc.language.isoen_US
dc.subjectDentistryen_US
dc.subjectPerioen_US
dc.subjectRapid maxillary expansion (RME)en_US
dc.subjectCone-Beam Computed Tomography (CBCT)en_US
dc.titleThe comparison of different rapid maxillary expansion devices from periodontal tissue health and root resorption perspectivesen_US
dc.typeThesis/Dissertationen_US
dc.date.updated2017-10-25T18:34:06Z
etd.degree.nameMaster of Science in Designen_US
etd.degree.levelmastersen_US
etd.degree.disciplineOrthodontics and Dentofacial Orthopedicsen_US
etd.degree.grantorBoston Universityen_US


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