Changes resulting from the arch mandible rapid expansion of jaw: follow one year after retention

• Grant number: 14/10573-0
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: January 01, 2015
• End date: December 31, 2015
• Field of knowledge: Health Sciences - Dentistry - Orthodontics
• Principal Investigator: Maria Bernadete Sasso Stuani
• Grantee: Ana Maria Bazaca Stochi
• Host Institution: Faculdade de Odontologia de Ribeirão Preto (FORP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil

Abstract

The aim of this study was to evaluate changes in the mandibular arch of patients submitted to rapid maxillary expansion (RME) during mixed dentition period (to be before pubertal growth spurt) and compare them to individuals with normal occlusion development, using measurements of plaster models. Thirty children were followed and divided into two groups: the experimental (n = 15) and control (n = 15). Patients in the experimental group (Ge) underwent to RME MacNamara protocol, while in the control group (Gc) no orthodontic intervention was performed. The results of paired t-test showed that in Ge, with theexception of the arch perimeter, all measurements changes were statistically significant (p <0.05).