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dc.contributor.authorWoland, Bradley Daviden_US
dc.date.accessioned2019-09-17T12:56:23Z
dc.date.available2019-09-17T12:56:23Z
dc.date.issued2014
dc.date.submitted2014
dc.identifier.other(OCoLC)927142145
dc.identifier.other(OCoLC)ocn927142145
dc.identifier.urihttps://hdl.handle.net/2144/37824
dc.descriptionThesis (MSD) --Boston University, Henry M. Goldman School of Dental Medicine, 2014 (Department of Orthodontics and Dentofacial Orthopedics).en_US
dc.descriptionIncludes bibliographic references: leaves 38-40.en_US
dc.description.abstractBackground: Previous CBCT studies have established standards for mesiodistal angulations and faciolingual inclinations of the dentition in a non-Caucasian population. These standards help ensure proper root positioning, since they are not based solely on the clinical crowns. Objective: to use the USC root vector analysis to measure the tip and torque of teeth to establish Caucasian norms. Methods: We measured and obtained mean mesiodistal and faciolingual angulations from each whole tooth from 34 pretreatment and 43 previously treated Caucasian patients, by using the University of Southern California root vector analysis program in Dolphin 3D. We used descriptive statistics to present normal torque and tip values. Two-Sample t-test was executed to compare right tip and torque values to the left side. One sample t-test was used to compare our Caucasian sample to the multi-ethnic sample in Tong et al. paper, and to compare pretreatment to post-treatment patients within the Caucasian group. Results: Comparing right to the left tip and torque values in our sample showed no significant difference (P[greater than]0.05). We compared our study sample to the USC sample norm and we found that there was statistical significant difference in almost all tip and torque values (P[less than]0.05). We found no statistically significant difference in angulation of teeth between treated and untreated Caucasian patients. Conclusion: We measured and obtained mean mesiodistal and faciolingual angulations from each whole tooth from 34 pretreatment and 43 previously treated Caucasian patients′ by using the University of Southem California root vector analysis program in Dolphin 3D. When comparing the right side to the left side of the treated and untreated Caucasian groups, there was no statistically significant difference between the measurements for either tip or torque. We found a statistically significant difference in angulation of teeth between Caucasian and USC populations. We found no statistically significant difference in angulation of teeth between treated and untreated Caucasian patients.en_US
dc.language.isoen_US
dc.publisherBoston Universityen_US
dc.rightsThis work is being made available in OpenBU by permission of its author, and is available for research purposes only. All rights are reserved to the author.en_US
dc.subjectToothen_US
dc.subjectCaucasiansen_US
dc.titleCBCT-derived norms for tip and torque in Caucasiansen_US
dc.typeThesis/Dissertationen_US
etd.degree.nameMaster of Science in Dentistryen_US
etd.degree.levelmastersen_US
etd.degree.disciplineOrthodontics & Dentofacial Orthopedicsen_US
etd.degree.grantorBoston Universityen_US


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