Maxillary expander with differential opening versus fan-type expander: a three-dimensional assessment

• Grant number: 18/16153-4
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Start date: January 30, 2019
• End date: December 29, 2019
• Field of knowledge: Health Sciences - Dentistry - Orthodontics
• Principal Investigator: Daniela Gamba Garib Carreira
• Grantee: Camila da Silveira Massaro
• Supervisor: Lucia Helena Cevidanes
• Host Institution: Faculdade de Odontologia de Bauru (FOB). Universidade de São Paulo (USP). Bauru , SP, Brazil
• Institution abroad: University of Michigan, United States
• Associated to the scholarship: 17/12911-9 - Maxillary expander with differential opening versus fan-type expander: a randomized clinical trial, BP.DR

Abstract

Introduction: The treatment of choice for maxillary constriction is the Rapid Maxillary Expansion (RME). However, there are no three-dimensional studies describing the effects of RME in the midpalatal suture and in the craniofacial complex. Purpose: To three-dimensionally assess the skeletal and dentoalveolar effects of the maxillary expander with differential opening and the fan-type expander in the mixed dentition. Material and Methods: A sample of 24 patients from 7 to 10 years old with transverse maxillary dental arch constriction was randomly allocated into two study groups: 12 individuals treated with the expander with differential opening (DEG) and 12 individuals treated with the fan-type expander (FEG). Cone-beam computed tomography (CBCT) exams were performed in the beginning of the treatment (T1) and 6 months after maxillary expansion (T2). Using the software ITK-SNAP and 3D-SLICER, segmentation and superimposition of T1 and T2 images at the cranial base will be performed. The three-dimensional displacement (X, Y and Z coordinates) of the maxilla, teeth, zygomatic bone and circum-maxillary sutures will be measured. Descriptive statistics will be used to describe the sample means, standard deviations and ranges. Intergroup comparisons will be performed using independent t tests. The intrarater reliability will be assessed using intraclass correlation coefficients and the Bland-Altman method. The significance level considered will be 5%.

Scientific publications

(The scientific publications listed on this page originate from the Web of Science or SciELO databases. Their authors have cited FAPESP grant or fellowship project numbers awarded to Principal Investigators or Fellowship Recipients, whether or not they are among the authors. This information is collected automatically and retrieved directly from those bibliometric databases.)

MASSARO, CAMILA; LOSADA, CAROLINA; CEVIDANES, LUCIA; YATABE, MARILIA; GARIB, DANIELA; PEREIRA LAURIS, JOSE ROBERTO; IOSHIDA, MARCOS; REY, DIEGO; ANTONIA ALVAREZ, MARIA; BENAVIDES, ERIKA; et al. Comparison of linear and angular changes assessed in digital dental models and cone-beam computed tomography. ORTHODONTICS & CRANIOFACIAL RESEARCH, v. 23, n. 1, NOV 2019. (18/16153-4)