Cephalometric Analyses Of Nine Year Old Children With Excellent Occlusion

Author : Yung-Chuan John Wu
Publisher :
ISBN 13 : 9781361349540
Total Pages : pages
Book Rating : 4.3/5 (495 download)

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Download or read book Lateral Cephalometrics in Southern Chinese written by Yung-Chuan John Wu and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Lateral Cephalometrics in Southern Chinese" by Yung-chuan, John, Wu, 吳永傳, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: The lateral cephalometric radiograph (LCR) is an important tool in orthodontics to aid diagnosis, inform treatment planning and to evaluate treatment outcomes. Following identification of frequently used cephalometric analyses in the literature, the aims of this thesis were: (i) to establish cephalometric norm values for 12-year-old southern Chinese children for the modified Bjork's analysis, Jacobson's Wits appraisal, Pancherz's Sagittal Occlusal (SO) and Vertical Occlusal (VO) analyses (Paper I and II); (ii) to identify gender and racial/ethnic variations in cephalometric norm values (Paper I and II); (iii) to extrapolate from the cephalometric norm values of 12-year-old southern Chinese to produce norm values for 10, 11, 13 and 14-year-old - for these common aforementioned cephalometric analyses and McNamara's analysis (Paper III); (iv) to investigate variations in the cephalometric characteristics of southern and northern Chinese children (Paper IV); and (v) to study the relationship between common cephalometric reference planes and the True Horizontal Plane (THP), and variations with respect to gender (Paper V). Extant LCRs from a community based sample of 200 male and 205 female 12-year-old southern Chinese in Hong Kong; 86 Caucasian children and 100 northern Chinese children, were traced and digitized twice employing the Computer Assisted Simulated for Orthognathic Surgery (CASSOS) program. Cephalometric norm values were created and extrapolated for 10 to 14-year-old. Gender and racial/ethnic variations were determined. In addition, the relationship between some common cephalometric reference planes (Sella Nasion Plane - SNP; Constructed Horizontal Plane - CHP; Frankfurt Horizontal Plane - FHP; Upper Occlusal Plane - UOP; Functional Occlusal Plane - FOP) and the THP was determined; and gender differences examined. Cephalometric norm values for modified Bjork's analysis, Jacobson's Wits appraisal and Pancherz's SO & VO analyses were produced for 12-year-old southern Chinese children. Variations in cephalometric norm values with respect to gender (PIn conclusion, norm values for frequently used cephalometric analyses were produced for 12-year-old southern Chinese, and extrapolated to produce norm values for 10 to 14-year-old. Age, gender and racial/ ethnic differences were apparent, supporting the need for age, gender and racial/ethnic specific norms. Common cephalometric reference planes differed to THP, and this warrants consideration in cephalometric analyses. DOI: 10.5353/th_b5317035 Subjects: Cephalometry