Evaluation of natural mandibular shape asymmetry: an approach by using elliptical Fourier analysis
| Autor: | Tania Camila Niño-Sandoval, Belmiro Ce Vasconcelos, Carlos F Morantes Ariza, Clementina Infante-Contreras |
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| Rok vydání: | 2018 |
| Předmět: |
Adult
Male Multivariate statistics Adolescent media_common.quotation_subject Mandible Asymmetry Young Adult 03 medical and health sciences symbols.namesake 0302 clinical medicine Multivariate analysis of variance Radiography Panoramic Statistics Humans Radiology Nuclear Medicine and imaging General Dentistry Retrospective Studies Mathematics media_common Fourier Analysis Radiography Dental Digital 030206 dentistry General Medicine Sexual dimorphism Otorhinolaryngology Fourier analysis 030220 oncology & carcinogenesis Principal component analysis symbols Hotelling's T-squared distribution Female Procrustes analysis Research Article |
| Zdroj: | Dentomaxillofacial Radiology. 47:20170345 |
| ISSN: | 1476-542X 0250-832X |
| DOI: | 10.1259/dmfr.20170345 |
| Popis: | OBJECTIVES: The purpose of this study was to demonstrate that asymmetry is a natural occurring phenomenon in the mandibular shape by using elliptical Fourier analysis. METHODS: 164 digital orthopantomographs from Colombian patients of both sexes aged 18 to 25 years were collected. Curves from left and right hemimandible were digitized. An elliptical Fourier analysis was performed with 20 harmonics. In the general sexual dimorphism a principal component analysis (PCA) and a hotelling T(2) from the multivariate warp space were employed. Exploratory analysis of general asymmetry and sexual dimorphism by side was made with a Procrustes Fit. A non-parametric multivariate analysis of variance (MANOVA) was applied to assess differentiation of skeletal classes of each hemimandible, and a Procrustes analysis of variance (ANOVA) was applied to search any relation between skeletal class and side in both sexes. RESULTS: Significant values were found in general asymmetry, general sexual dimorphism, in dimorphism by side (p |
| Databáze: | OpenAIRE |
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