Cephalometric and occlusal changes of class III malocclusion patients treated with or without extractions

• Grant number: 15/06177-5
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: June 01, 2015
• End date: February 28, 2017
• Field of knowledge: Health Sciences - Dentistry - Orthodontics
• Agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: Guilherme dos Reis Pereira Janson
• Grantee: Roberto Bombonatti
• Host Institution: Faculdade de Odontologia de Bauru (FOB). Universidade de São Paulo (USP). Bauru , SP, Brazil
• Associated scholarship(s): 15/16897-5 - Cephalometric and occlusal changes of Class III malocclusion patients treated with or without extractions, BE.EP.PD

Abstract

The aim of this retrospective study is to evaluate the cephalometric and occlusal changes of orthodontically treated Class III malocclusion patients. The sample will consist of three groups: two experimental and one control group. The experimental groups will comprise patients treated at Bauru Dental School, University of São Paulo, Brazil, without (G1) or with extraction (G2). The control group (G3), matched by age and sex with the experimental groups, will consist of subjects with untreated Class III malocclusion from the Burlington Growth Centre, located at the Faculty of Dentistry, University of Toronto, Canada. All patients must present with a Class III malocclusion with an overjet smaller than 0mm. Cephalometric variable changes will be assessed in lateral cephalometric radiographs at the beginning (T1) and at the end (T2) of treatment or observation period. Concurrently, occlusal changes will be measured in dental study models at the beginning (M1) and at the end (M2) of the evaluation period. These occlusal changes will be evaluated by the peer assessment rating (PAR) index and the treatment outcomes will be evaluated by the Objective Grading System (OGS), recommended by the American Board of Orthodontics. If the variables display normal distribution, intragoup comparisons will be performed with paired t tests and intergroup comparisons with one-way ANOVA. If the data are not normally distributed, Wilcoxon and Kruskal-Wallis tests will be used, respectively. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

ROBERTO BOMBONATTI; ARÓN ALIAGA-DEL CASTILLO; JULIANA FRAGA SOARES BOMBONATTI; DANIELA GARIB; BRYAN TOMPSON; GUILHERME JANSON. Cephalometric and occlusal changes of Class III malocclusion treated with or without extractions. Dental Press J. Orthod., v. 25, n. 4, p. 24-32, 2020-09-21. (15/06177-5)