Prospective tomographic (CBCT) and radiographic study of individuals Class II division 1ª malocclusion, treated with Herbst appliance after growth spurt

• Grant number: 10/17934-8
• Support Opportunities: Regular Research Grants
• Start date: March 01, 2011
• End date: February 28, 2013
• Field of knowledge: Health Sciences - Dentistry - Orthodontics
• Principal Investigator: Dirceu Barnabé Raveli
• Grantee: Dirceu Barnabé Raveli
• Host Institution: Faculdade de Odontologia (FOAr). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil

Abstract

The aim of this study is to evaluate the skeletal, dental and condylar changes, caused by Herbst appliance in the treatment of Class II malocclusion, Division 1 of Angle, in patients after growth surge. The sample is composed of 24 patients of both genders, age 13-18 years, with the Class II malocclusion 1st Division. With mandibular deficiency, and will be treated with the Herbst appliance with soldier bands for a period of eight months in advance only. For evaluation of dental, skeletal and condylar changes, it will be used lateral radiographs and CT scans Cone Beam obtained at three different times: T1 - initial, T2 - 8 months after and T3 - one year after treatment, which will be analyzed for radiographic and tomographic. These results are also compared with a control subjects from the Canadian Burlington Growth Centre, known worldwide as a Centre of Studies of Normal Growth, which offers an extensive archive of longitudinal radiographs of individuals Canadians not treated orthodontically. The results will be statistically analyzed by Student t test or test similar nonparametric. (AU)