Home Page 1

Reference URL

Comment

Save to favorites

To link to the entire object, paste this link in email, IM or document

To embed the entire object, paste this HTML in website

To link to this page, paste this link in email, IM or document

To embed this page, paste this HTML in website

Relationship between key cephalometric parameters and tooth tip and torque

Page 1

Save page

1 of 42

View Description

View PDF & Text

Download

small (250x250 max)

medium (500x500 max)

large ( > 500x500)

Full Resolution

All (PDF)

This page

All

Subset

PDF
Text

Text Search...

Object Description

Title	Relationship between key cephalometric parameters and tooth tip and torque
Author	Fong, Garrett S.
Author email	gfong@usc.edu;gsfong.usc@gmail.com
Degree	Master of Science
Document type	Thesis
Degree program	Cranio-Facial Biology
School	School of Dentistry
Date defended/completed	2012-03-09
Date submitted	2012-05-04
Date approved	2012-05-04
Restricted until	2012-05-04
Date published	2012-05-04
Advisor (committee chair)	Sameshima, Glenn
Advisor (committee member)	Paine, Michael Enciso, Reyes Tong, Hongsheng
Abstract	The purpose of this study was to determine the most accurate correlations between different skeletal patterns and tooth inclination and angulation by using data purely from CBCT X-rays to minimize inaccuracies inherent in previous studies based on traditional X-rays. After determining a set of inclusion and exclusion criteria, 91 cases with “near normal” occlusion were selected. CBCT X-rays were used to generate 2D lateral cephalometric head films with minimal amounts of noise and distortion to maximize accuracy in landmark identification. ANB and SN-GoGn were chosen to represent antero-posterior and vertical skeletal parameters, respectively. Data from Kwon’s previous study on ideal tip/torque values was used to perform correlation studies with the aforementioned cephalometric parameters. Labial crown torque for upper incisor, canine, and premolar teeth were found to be positively correlated with an increase in mandibular plane angle (p < 0.05). There was no indication of a significant correlation existing between upper molars and mandibular plane angle. Mandibular plane angle was not shown to have a significant correlation with faciolingual inclinations of upper molars or any lower teeth. ANB shared a negative correlation with the torque of the maxillary first molar, and a positive correlation with each lower tooth (p < 0.05). There was a positive correlation between mesial tip of the lower canine and an increased ANB value (p < 0.05). The clinical implication of this study is the importance in recognizing that dental and skeletal characteristics are unique to each individual. Patents should not all be treated in the same manner with the same objectives. Bracket prescriptions have been created according to certain patient populations and are not intended for universal application without modifications. The orthodontist must focus on the individual needs for each patient and customize each case through modified bracket positioning or wire bending as necessary.
Keyword	cephalometric parameters; cbct; anb; sn-gogn; tooth; tip; torque; angulation; inclination
Language	English
Part of collection	University of Southern California dissertations and theses
Publisher (of the original version)	University of Southern California
Place of publication (of the original version)	Los Angeles, California
Publisher (of the digital version)	University of Southern California. Libraries
Provenance	Electronically uploaded by the author
Type	texts
Legacy record ID	usctheses-m
Rights	Fong, Garrett S.
Access conditions	The author retains rights to his/her dissertation, thesis or other graduate work according to U.S. copyright law. Electronic access is being provided by the USC Libraries in agreement with the author, as the original true and official version of the work, but does not grant the reader permission to use the work if the desired use is covered by copyright. It is the author, as rights holder, who must provide use permission if such use is covered by copyright. The original signature page accompanying the original submission of the work to the USC Libraries is retained by the USC Libraries and a copy of it may be obtained by authorized requesters contacting the repository e-mail address given.
Repository name	University of Southern California Digital Library
Repository address	USC Digital Library, University of Southern California, University Park Campus MC 7002, 106 University Village, Los Angeles, California 90089-7002, USA
Repository email	cisadmin@usc.edu
Archival file	uscthesesreloadpub_Volume4/etd-FongGarret-770.pdf