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Evaluation of innovative and conventional orthopedic maxillary expanders: a randomized clinical trial

Grant number: 17/24115-2
Support type:Regular Research Grants
Duration: April 01, 2018 - March 31, 2020
Field of knowledge:Health Sciences - Dentistry - Orthodontics
Principal researcher:Daniela Gamba Garib Carreira
Grantee:Daniela Gamba Garib Carreira
Home Institution: Faculdade de Odontologia de Bauru (FOB). Universidade de São Paulo (USP). Bauru , SP, Brazil


Objective: The primary goal of this study is to compare in growing patients the dentoskeletal effects of four types of orthopedic maxillary expanders: Mini-implanted anchored rapid palatal expander (MARPE), expander with differential opening (EDO), fan-type expander (F) and conventional Hyrax expander (H). The secondary goal is evaluating the efficacy and efficiency of maxillary permanent incisor alignment comparing the invisible aligners and the fixed 4x2 mechanics. Methods: A sample of 64 patients from 7 to 11 years of age with h transverse maxillary dental arch constriction will be randomly allocated into four study groups: group MARPE composed by 16 individuals treated with hybrid expanders; group EDO with 16 individuals treated with the expander with differential opening (EDO); group F composed by 16 patients treated with the fan-type expander and; group H composed by 16 patients treated by conventional Hyrax expanders. After expander removal, patients with maxillary incisor crowding will be randomized again for treatment with invisible aligners or partial fixed appliances using a 4x2 mechanics. Cone-beam computed tomography (CBCT) will be performed before treatment (T1) and 6 months after expansion when the appliance is removed (T2). Digital dental models will be obtained at T1, T2 and T3 (after maxillary incisor alignment). Maxillary transverse dimensions, nasal cavity width, posterior tooth inclinations and buccal bone level will be measured in CBCT images. The tridimensional CBCT image of T2 will be registered in T1 using the cranial base for measuring the orthopedic effect into the three planes (x, y and z coordinates). Maxillary arch widths, perimeter, length, shape and incisor irregularity will be measured in digital models. Statistical analysis: Interphase and intergroup comparisons of maxillary expanders will be evaluated using paired t tests and Variance with Tukey tests, respectively. The efficiency and efficacy of incisor aligner mechanics will be compared using independent t tests and Chi-square tests. The significance level regarded will be 5%. (AU)

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Scientific publications (6)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MASSARO, CAMILA; JANSON, GUILHERME; MIRANDA, FELICIA; ALIAGA-DEL CASTILLO, ARON; PUGLIESE, FERNANDO; PEREIRA LAURIS, JOSE ROBERTO; GARIB, DANIELA. Dental arch changes comparison between expander with differential opening and fan-type expander: a randomized controlled trial. EUROPEAN JOURNAL OF ORTHODONTICS, v. 43, n. 3, p. 265-273, . (17/12911-9, 17/24115-2)
MASSARO, CAMILA; GARIB, DANIELA; CEVIDANES, LUCIA; JANSON, GUILHERME; YATABE, MARILIA; PEREIRA LAURIS, JOSE ROBERTO; RUELLAS, ANTONIO CARLOS. Maxillary dentoskeletal outcomes of the expander with differential opening and the fan-type expander: a randomized controlled trial. CLINICAL ORAL INVESTIGATIONS, v. 25, n. 9, p. 5247-5256, . (17/12911-9, 17/24115-2)
MIRANDA, FELICIA; GARIB, DANIELA; PUGLIESE, FERNANDO; DA CUNHA BASTOS, JOSE CARLOS; JANSON, GUILHERME; PALOMO, JUAN MARTIN. Upper airway changes in Class III patients using miniscrew-anchored maxillary protraction with hybrid and hyrax expanders: a randomized controlled trial. CLINICAL ORAL INVESTIGATIONS, v. 26, n. 1, p. 183-195, . (19/03175-2, 17/04141-9, 17/24115-2)
MIRANDA, FELICIA; BASTOS, JOSE CARLOS DA CUNHA; SANTOS, ALEXANDRE MAGNO DOS; JANSON, GUILHERME; LAURIS, JOSE ROBERTO PEREIRA; GARIB, DANIELA. Dentoskeletal comparison of miniscrew-anchored maxillary protraction with hybrid and conventional hyrax expanders: A randomized clinical trial. AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS, v. 160, n. 6, p. 774-783, . (19/03175-2, 17/24115-2, 17/04141-9)
GARIB, DANIELA; MIRANDA, FELICIA; PALOMO, JUAN MARTIN; PUGLIESE, FERNANDO; DA CUNHA BASTOS, JOSE CARLOS; DOS SANTOS, ALEXANDRE MAGNO; JANSON, GUILHERME. Orthopedic outcomes of hybrid and conventional Hyrax expanders: Secondary data analysis from a randomized clinical trial. ANGLE ORTHODONTIST, v. 91, n. 2, p. 178-186, . (17/24115-2, 19/03175-2, 17/04141-9)
MIRANDA, FELICIA; DA CUNHA BASTOS, JOSE CARLOS; DOS SANTOS, ALEXANDRE MAGNO; VIEIRA, LUIZ SERGIO; ALIAGA-DEL CASTILLO, ARON; JANSON, GUILHERME; GARIB, DANIELA. Miniscrew-anchored maxillary protraction in growing Class III patients. JOURNAL OF ORTHODONTICS, v. 47, n. 2, p. 170-180, . (17/04141-9, 17/24115-2, 19/03175-2)

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