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A Morphometric Study of Hard Tissue Morphology in Subjects with Class Ⅱ Malocclusions

Author: YuanFeng
Tutor: DuanYinZhong
School: Fourth Military Medical University
Course: Stomatology
Keywords: ClassⅡmalocclusions Morphometry Cephalometry Mandibular retrusion Principal components analysis
CLC: R783.5
Type: Master's thesis
Year: 2006
Downloads: 76
Quote: 0
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Abstract


Class Ⅱ malocclusion was common in clinic. Many researchers had investigated the structures of Class Ⅱ malocclusion , but their conclusions were not identical. The conventional cephalometric analysis (CCA) and univariate statistics were overused . The development of statistical methods and the application of geometric morphometric methods could make researchers to quantitative describe of morphological shape.Form was the combination of size and shape.The research , separating shape from size , was complex and possible by using Procrustes superimposion. EDMA quantitatively analysed shape change using the ratios of form-difference matrix. TPS produced a visually appealing representation of the morphological change between the forms.Part 1 This part investigated the techniques currently available for the analysis of cephalograms , their principle , contents and advantages .The softwares about morphometries were demonstrated for the next researches. Part 2 The purpose of this study was to evaluate the Craniofacial heterogeneity of patients with Class Ⅱ malocclusions by Procrustes superimposition and principal components analysis. Methods: A total of 60

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CLC: > Medicine, health > Oral Sciences > Oral orthotics > Journal of Orthodontics
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