Jaqueline Peter, Fabiane Azeredo, Susana Maria Deon Rizzatto, Cátia Cardoso Abdo Quintão, Tarek Elshebiny, Juan Martin Palomo, Luciane Macedo de Menezes
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引用次数: 0
Abstract
Objectives
To evaluate the dentoalveolar effects on the upper first premolars after two maxillary expansion protocols—rapid maxillary expansion (RME) and alternate rapid maxillary expansion and constriction (Alt-RAMEC)—before and 6 months after treatment.
Materials and Methods
Cone-Beam Computed Tomography (CBCT) images of 20 patients who underwent maxillary expansion with the Hyrax appliance under two activation protocols were evaluated. Dental and alveolar measurements at the premolar region (tooth length, alveolar bone level and thickness) were measured before (T1) and after expansion (T2). Intra- and inter-examiner reliability was determined using Intraclass Correlation Coefficients. Statistical analyses included the Shapiro–Wilk test and Student's t-tests for paired and independent samples. Statistical significance was set at 5%.
Results
A significant increase in interpremolar distances was observed, both in the radicular and coronal levels (4.29 mm and 4.97 mm), with greater coronal than root distance. This was more evident in the Alt-RAMEC group. Alveolar thickness showed an average reduction of 0.54 mm after expansion.
Conclusions
The expansion effects of the two protocols were similar in the premolar region, resulting in a reduction in alveolar thickness. A tendency for greater tooth inclination and root reduction was observed after the Alt-RAMEC protocol.
期刊介绍：
Orthodontics & Craniofacial Research - Genes, Growth and Development is published to serve its readers as an international forum for the presentation and critical discussion of issues pertinent to the advancement of the specialty of orthodontics and the evidence-based knowledge of craniofacial growth and development. This forum is based on scientifically supported information, but also includes minority and conflicting opinions.
The objective of the journal is to facilitate effective communication between the research community and practicing clinicians. Original papers of high scientific quality that report the findings of clinical trials, clinical epidemiology, and novel therapeutic or diagnostic approaches are appropriate submissions. Similarly, we welcome papers in genetics, developmental biology, syndromology, surgery, speech and hearing, and other biomedical disciplines related to clinical orthodontics and normal and abnormal craniofacial growth and development. In addition to original and basic research, the journal publishes concise reviews, case reports of substantial value, invited essays, letters, and announcements.
The journal is published quarterly. The review of submitted papers will be coordinated by the editor and members of the editorial board. It is policy to review manuscripts within 3 to 4 weeks of receipt and to publish within 3 to 6 months of acceptance.
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