Three-dimensional dentoskeletal comparison of maxillary protraction anchored in miniplates versus miniscrews

• Grant number: 21/10792-8
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Effective date (Start): May 01, 2022
• Effective date (End): April 30, 2023
• Field of knowledge: Health Sciences - Dentistry - Orthodontics
• Principal Investigator: Daniela Gamba Garib Carreira
• Grantee: Felicia Miranda
• Supervisor: Lucia Helena Cevidanes
• Host Institution: Faculdade de Odontologia de Bauru (FOB). Universidade de São Paulo (USP). Bauru , SP, Brazil
• Research place: University of Michigan, United States
• Associated to the scholarship: 20/01698-5 - Comparison of maxillary protraction anchored in miniplates and miniscrews: three-dimensional dentoskeletal analysis, BP.PD

Abstract

The aim of this study is to compare the skeletal and dentoalveolar changes produced by three protocols of maxillary protraction with skeletal anchorage: the bone-anchored maxillary protraction with titanium miniplates (BAMP), the miniscrew-anchored maxillary protraction with Class III elastics (MAMP) and with fixed nickel titanium coil springs (Modified-MAMP). Methods: The sample will comprise 61 individuals, of both sexes, ages ranging from 9 to 13 years, with Class III skeletal malocclusion. Group MAMP will consist of 18 individuals treated with Class III elastic anchored in a hybrid expander (with two palatal miniscrews) and 2 miniscrews in the distal of the mandibular permanent canines. Group Modified-MAMP will consist of 18 individuals treated with a fixed nickel-titanium coil spring anchored in a hybrid expander and in 2 mandibular miniscrews positioned distally to the permanent canines. Group BAMP will consist of 25 individuals treated with a Class III elastic anchored in two miniplates positioned in the infra-zygomatic crest and two miniplates in the mesial of the mandibular permanent canines. Cone-beam computed tomography (CBCT) will be obtained before (T1) and after (T2) treatment. Linear and angular three-dimensional changes will be compared after T1 and T2 CBCT cranial base superimposition using the open-source software ITK-SNAP and the 3D Slicer software. The analysis of variance will be used for intergroup comparisons. A significance level of 5% will be regarded for all tests. (AU)