ObjectiveThe aim of this study was to evaluate the skeletal and dentoalveolar changes after miniscrew-assisted rapid palatal expansion (MARPE) in young adults by cone-beam computed tomography (CBCT).MethodsThis retrospective study included 14 patients (mean age, 20.1 years; range, 16–26 years) with maxillary transverse deficiency treated with MARPE. Skeletal and dentoalveolar changes were evaluated using CBCT images acquired before and after expansion. Statistical analyses were performed using paired t-test or Wilcoxon signed-rank test according to normality of the data.ResultsThe midpalatal suture was separated, and the maxilla exhibited statistically significant lateral movement (p < 0.05) after MARPE. Some of the landmarks had shifted forwards or upwards by a clinically irrelevant distance of less than 1 mm. The amount of expansion decreased in the superior direction, with values of 5.5, 3.2, 2.0, and 0.8 mm at the crown, cementoenamel junction, maxillary basal bone, and zygomatic arch levels, respectively (p < 0.05). The buccal bone thickness and height of the alveolar crest had decreased by 0.6–1.1 mm and 1.7–2.2 mm, respectively, with the premolars and molars exhibiting buccal tipping of 1.1°–2.9°.ConclusionsOur results indicate that MARPE is an effective method for the correction of maxillary transverse deficiency without surgery in young adults.
This study aimed to analyze the treatment effects of miniscrew-assisted rapid palatal expansion using dental cone-beam computed tomography (CT) in adolescents. The study group comprised 20 patients who underwent cone-beam CT before and after miniscrew-assisted rapid palatal expansion (MARPE). Paired t-test and analysis of variance were used to analyze significant differences before and after treatment. Skeletal and dentoalveolar measurements indicated highly significant differences, with these expansions increasing progressively in the downward direction. The extent of anterior midpalatal suture expansion was significantly greater than that of the posterior part. Significant expansion was observed at the nasal width and inter-zygomaticomaxillary suture distance. MARPE can expand the craniofacial skeletal structure to the uppermost nasal bone and lateral to the zygomaticomaxillary sutures. The expansion was greater in the lower maxillary part, demonstrating an overall triangular maxillary expansion. The midpalatal suture opening was greater in the anterior than in the posterior side, whereas the posterior suture opening proportion was higher than that of the conventional rapid palatal expansion previously reported.
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