Work

Rotational fulcrum and dentoskeletal changes after rapid palatal expansion with tooth-bone-borne (MARPE) and tooth-borne appliances in post-pubertal patients

Year: 2025

Type: article

Abstract: Objectives: To identify the rotational fulcrum (RF) and to evaluate the skeletal and dentoalveolar effects after rapid palatal expansion (RPE) with tooth-borne and tooth-bone-borne (MARPE) appliances. Materials and Methods: 31 patients were selected (MARPE group: n = 14, age 16.2 ± 2 years; hyrax group: n = 17, age 14.7 ± 0.8 years) with RPE indication and having cone-beam computed tomography before (T1) and after RPE (T2) and after 6 months of retention (T3). Results: In the MARPE group, the RF was at or above the frontozygomatic suture (FZS), whereas in the hyrax group, it was at or below the FZS. The skeletal response rates were 70% (2°) and 33% (1.09°); alveolar response rates, 18% (0.52°) and 20% (0.68°); and dental response rates, 12% (0.35°) and 47% (1.54°) in the MARPE and hyrax groups, respectively, with a significant difference between groups in skeletal (P = .005) and dental (P < .001) regions. After retention, no significant difference was found between groups. Conclusions: Although MARPE resulted in a higher RF in the coronal view, both techniques effectively corrected transverse discrepancies with similar stability. Considering the between-group differences in relation to skeletal and dentoalveolar response, MARPE should be used for cases in which minimal compensatory tooth movement is desired.

Source: The Angle Orthodontist

DOI: 10.2319/111224-931.1

Authors: Luciana Quintanilha Pires Fernandes, Giselle Naback Lemes Vilani, Bruno de Paula Machado Pasqua, Cristiane Barros André, Jonas Capelli

Institutions: Universidade do Estado do Rio de Janeiro, Pontifícia Universidade Católica de Minas Gerais, University at Buffalo, State University of New York, Universidade de Mogi das Cruzes

Language: English

Topic: Orthodontics and Dentofacial Orthopedics

Subfield: Orthodontics

Field: Dentistry

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: diamond

Funders: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, Stichting Kinderen Kankervrij