Skeletal changes in vertical after rapid maxillary expansion with use of McNamara appliance

• Grant number: 13/27139-9
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: June 01, 2014
• End date: December 31, 2014
• Field of knowledge: Health Sciences - Dentistry - Orthodontics
• Principal Investigator: Maria Bernadete Sasso Stuani
• Grantee: Victória Marguerita Paula Gollucci Corrêa
• Host Institution: Faculdade de Odontologia de Ribeirão Preto (FORP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil

Abstract

This study evaluated cephalometrically the changes occurred in the hard and soft-tissue facial profile after rapid maxillary expansion (RME). The sample was composed of 30 children in the mixed dentition phase with narrow maxilla and posterior crossbite, who were treated with a fixed maxillary expander with occlusal splint. Lateral cephalometric radiographs were examined at three moments: pretreatment (T1), post-RME (T2) and after 3 months of retention (T3). Cephalometric methods were used to determine possible changes in the hard and soft-tissue facial profile of the patients. Data were analyzed statistically by ANOVA and Tukey's test (±=0.05).