Three-dimensional evaluation of skeletal and dental effects of treatment with maxillary skeletal expansion
| Autor: | Craig McMullen, Najla N. Al Turkestani, Antonio C.O. Ruellas, Camila Massaro, Marcus V.N.N. Rego, Marilia S. Yatabe, Hera Kim-Berman, James A. McNamara, Fernanda Angelieri, Lorenzo Franchi, Peter Ngan, Hong He, Lucia H.S. Cevidanes |
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| Rok vydání: | 2022 |
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| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP Am J Orthod Dentofacial Orthop |
| Popis: | OBJECTIVES: To determine the skeletal and dental changes with Microimplant Assisted Rapid Palatal Expansion (MARPE) appliances in growing and non-growing patients using cone beam computed tomography (CBCT) and 3D imaging analysis. METHODS: The sample was comprised of 25 patients with transverse maxillary discrepancy treated with Maxillary Skeletal Expander (MSE, a type of MARPE appliance). CBCT scans were taken before and after maxillary expansion; the interval was 6 ± 4.3 months. The sample was divided into growing and non-growing groups using cervical vertebrae and midpalatal suture maturation. Linear and angular three dimensional dentoskeletal changes were assessed after cranial base superimposition. The treatment groups were compared with Independent Sample t-test (P < .05). RESULTS: Both groups displayed marked transverse changes with a similar ratio of skeletal to dental transverse changes and parallel sutural opening from the PNSANS; a similar amount of expansion occurred in the anterior and the posterior regions of the maxilla. The maxilla expanded skeletally without rotational displacements in both groups. The small downward-forward displacements were similar in both groups, except that the growing group had a significantly greater vertical displacement of the canines (1.7 ±1.0 mm in growing patients, 0.6 ±0.8 mm in non-growing patients; P = 0.02) and ANS (1.1 ±0.6 mm in the growing group, 0.5 ±0.5 mm in the non-growing group; P = 0.004). CONCLUSIONS: Treatment of patients with MARPE appliance is effective in growing and non-growing patients. While greater skeletal and dental changes were observed in growing patients, a similar ratio of skeletal to dental transverse changes was observed in both groups. |
| Databáze: | OpenAIRE |
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