Abstract
Objectives
To evaluate and correlate the dentoskeletal changes of adult patients after miniscrew-assisted rapid palatal expander (MARPE) in the two final stages of midpalatal suture ossification.
Materials and methods
This interventional pre-post clinical study consisted of 20 adults (24.9±1.8 years), with transverse maxillary atresia, divided into two subgroups (n=10) based on the ossification degree of the midpalatal suture: stage D, fusion completed in the palatine bone; and stage E, fusion anteriorly in the maxilla. Cone beam computed tomography (CBCT) in the pre- (T0) and post-treatment (T1) time intervals were used to evaluate the anterior and posterior sutural opening, activation of the expander screw, vestibular-lingual inclinations, and widths of first premolars and first molars. Maxillary interincisor diastema was measured on patients’ plaster models in the same timepoints. The Wilcoxon-Mann-Whitney test, generalized linear models (GLM), and chi-square (χ2) test were employed.
Results
All variables significantly increased after MARPE therapy regardless of the ossification degree (P<0.05). Patients with stage D suture presented wider interincisal diastema and maxillary suture opening (on both regions, anterior and posterior) when compared with patients with stage E (P<0.05). Maxillary interincisor diastema was positively associated with anterior and posterior suture opening for all subjects (P<0.05). MARPE therapy was unsuccessful in six patients, mostly presented by individuals with E maturation stage of the midpalatal suture.
Conclusions
After MARPE, a significant correction in the transverse defect of the maxillary basal bone was achieved for adults in the last two midpalatal suture maturation stages.
Clinical relevance
Adult patients in stage D of maxillary suture ossification are more susceptible to dentoskeletal changes following MARPE therapy as compared to patients with stage E.
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IS: standardizing methodology, intervention, data collection, and interpretation, and writing the manuscript. ESC: blinding, randomization, and clinical follow-up after intervention. AF: formulating the methodology, and clinical intervention. CMF and WC: guidance throughout the study and manuscript editing. The authors read and approved the final version of the manuscript.
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Assessment of method error according to Bland-Altman analysis and Dahlberg’s formula. (DOCX 46 kb)
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Salmoria, I., de Souza, E.C., Furtado, A. et al. Dentoskeletal changes and their correlations after micro-implant-assisted palatal expansion (MARPE) in adults with advanced midpalatal suture ossification. Clin Oral Invest 26, 3021–3031 (2022). https://doi.org/10.1007/s00784-021-04284-x
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DOI: https://doi.org/10.1007/s00784-021-04284-x