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MAXILLARY BONE CHARACTERISTICS ON CONE-BEAM COMPUTED TOMOGRAPHY IN PATIENTS TREATED BY MINISCREW-ASSISTED RAPID PALATAL EXPANDER (MARPE)
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Abstract
Objectives: To evaluate radiographic outcomes of patient with maxillary constriction, was treated with miniscrew-assisted rapid palatal expander (MARPE) at National hospital of odonto-stomatology, Hanoi from 2018 to 2022. Subjects and methods: A sample size of 30 patient records, between the age of 13-28 years old was collected and analyzed the change on CTCB film post treatment. Result: Midpalatal suture ossification were all at C, D and E stages, with decreasing of MPS width from anterior to posterior. The width of the maxillary arch was initially narrower than mandible. The width of the upper arch and the difference between the width of the upper and lower arches are smaller than the Yonsei index. After completing the expansion, the upper arch has covered the lower arch. The increase in maxillary arch width in canines, premolars and molars are 2.91mm, 4.51mm and 6.00mm, respectively. The change was statistically significant at all three positions (p<0.05). Mandibular arch width also increased, but not statistically significant. Conclusions: 30 patients between the age of 13-28 years old, the ossification of mid palatal suture was almost at C, D and E stage. The separation of MPS and rapid maxillary expansion also had the side effect on teeth and alveolar bone, and the change is statistically significant.
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Keywords
MARPE, maxillary constriction, midpalatal suture, CBCT
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