Ana Lúcia Alvares Capelozza

Objective: To compare the opening of the midpalatal suture after rapid maxillary expansion (RME) with the expander with differential opening and the fan-type expander. Methods: Rapid maxillary expansion was performed with the expander with differential opening (n=12, 8 female, 4 male, mean age of 7.75 years) and the fan-type expander (n=12, 8 female, 4 male, mean age 8.08 years). CBCT scans were acquired before (T1) and immediately after (T2) the expansion. The outcomes comprised the opening of the midpalatal suture in the anterior and posterior nasal spine. Intergroup comparisons were performed with t or Mann-Whitney U tests (P<0.05). Results: All patients showed a midpalatal suture opening with greater increases in the anterior nasal spine compared to the region of the posterior nasal spine. The split in the anterior nasal spine was similar in both groups (P=0.153), while the opening in the posterior nasal spine was 1 mm greater in the differential expansion group (P<0.001). The greater increase in the anterior region of the midpalatal suture in both groups suggested a trapezoidal shape split. Conclusions: The expander with differential opening and the fan-type expander were capable of splitting the midpalatal suture in the mixed dentition. Despite both appliances showed similar opening in the anterior nasal spine, a greater expansion in the posterior region of the midpalatal suture was observed with the expander with differential opening.

A odontodisplasia regional é uma anomalia dentária, pouco comum, não hereditária e com uma etiologia ainda desconhecida. Os tecidos afetados são o esmalte e a dentina, são acometidos nos dentes decíduos e, as vezes na dentição permanente de um mesmo indivíduo. Esta lesão pode ser confundida com outras lesões como por exemplo o odontoma ou dentes com outro tipo de anomalia. O objetivo é relatar um caso de odontodisplasia regional na dentição decídua e permanente de uma criança, assim como apresentar as diferentes ferramentas diagnósticas. Os dentes acometidos mostravam-se ao exame clínico, como dentes hipoplásicos com coloração amarelo amarronzado. Uma radiografia panorâmica e radiografias periapicais, assim como uma biopsia excisional, foram essenciais para obter um diagnóstico correto, e assim poder oferecer uma adequada conduta para a preservação e previsibilidade dos diferentes tipos de tratamentos reabilitadores odontológicos que essa criança poderia ter nos próximos anos até a idade adulta.

Uma taxa de sucesso e sobrevivência dos implantes de 96,6%, após um seguimento de 1 a 3 anos e houve um ganho ósseo de aproximadamente 3mm.

Objectives: This study investigated the association of congenital cervical vertebrae anomalies (CVA) with the prevalence of cleft lip and palate (CLP) specifying the most frequent associations. Methods: A meta-analysis was based on the Preferred Reporting Items of Systematic reviews and Meta-Analyses guideline. A search of the PubMed, Embase, Web of Science, Science Direct, Scopus and Lilacs database was performed until March 2018. Clinical studies that evaluated CVA in individuals with CLP (experimental group) and without CLP (control group) was included. For the statistical analysis, the software Comprehensive Meta-Analysis (Biostat; Englewood, NJ) was used, with a p-value < 0.05 considered significant. Results: A total of 10 articles were included, for a total of 2566 individuals with CLP and 2301 individuals without CLP. The meta-analysis indicated statistically significant differences and the group of individuals with CLP had an increased number of CVA when compared to the group of individuals without CLP (p < 0.05; 95% confidence interval, 2.41–6.11; heterogeneity: Q-value 32.8, I2 72.6%). Conclusions: This study indicated that CVA are associated with the presence of CLP. Among the patients with CVA the most frequent anomalies were the deficiency of the posterior arch, followed by the fusion of cervical vertebrae. Individuals with cleft palate and those with unilateral cleft lip and palateCLP had an increased prevalence of CVA.

To evaluate the influence of rotation degree and FOV size on the amount of artefacts produced in CBCT images. A cylindrical wax utility phantom, with a metallic sample in its interior, was scanned with two FOV sizes (100 x 100 and 40 x 40 mm) and in full (360°) and partial (~180°) rotations. After the acquisitions, images were objectively assessed in the ImageJ software, obtaining the standard deviation in areas around the metal sample. The influence of artefacts produced by the several FOVs and rotation degrees was compared by two-way analysis of variance (ANOVA) (α=0.05). The images obtained with a large FOV presented a higher amount of noise compared to a restricted FOV, both for partial (p=0.0037) and full (p=0.0023) rotation degrees. For images obtained with a restricted FOV, full rotation resulted in images with less noise (p=0.0259). For images obtained with large FOV, there was no statistically significant difference (p=0.1494) in noise for both rotation protocols. As there were no significant differences in the amount of artefacts in rotation protocols for large FOVs, the partial rotation can be indicated due to its lower exposure to radiation. For acquiring images with restricted FOVs, the full rotation is recommended.

Alveolodental ankylosis is the fusion of cementum or root dentin with the alveolar bone in both deciduous and permanent teeth. This leads to important clinical and radiographic changes in the affected teeth. Moreover, knowledge of the biological principles involved allows adequate management of teeth affected by this phenomenon.

Objectives:The aim of this study was to identify the type and frequency of incidental findings (IFs) in the maxillofacial region of CBCT scans with different sizes of field of view (FOV), and the clinical relevance of the findings was classified as requirement or not of monitoring, treatment or referral to a specialist.Methods:We analyzed 150 CBCT examinations, divided according to the size of the FOV into 3 groups: 6-cm maxilla, 6-cm mandible and 13-cm maxilla/mandible. The IFs were categorized into six areas: airway, temporomandibular joint (TMJ), bone, lesions of the jaws, teeth and soft-tissue calcifications.Results:The results showed 560 IFs that were found in 92% of the samples studied. A total of 225 IFs were found in examinations of the maxilla group, 99 findings in the mandible group and 236 findings in the maxilla/mandible group. The IFs were most frequent in the tooth zone (27.32%), followed by airways, soft-tissue calcifications, TMJ, bone, lesions of the jaw and other findings. We also found ...