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Dentigerous cyst is the most common developmental maxillary cyst, often being associated with impacted third molars. The occurrence of bilateral or multiple lesions is usually associated with syndromes. The present report describes a case of multiple dentigerous cyst affecting both maxilla and mandible in association with impacted third molars in a non-syndromic patient. The complementary use of cone beam computed tomography (CBCT) could provide accurate knowledge for pre-operative radiologic assessment to delineate the extension of the lesion as well as its relationship with adjacent structures. The typical imaging characteristics can be useful for an adequate diagnosis. This type of lesion requires comprehensive pre-operative evaluation and logical operational approach.

Made available in DSpace on 2022-04-28T19:42:02Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01 Objective: The aim of this study was to evaluate whether the volume of odontoid process of the second cervical vertebra on CBCT images can be used for sex estimation. Material and Methods: The volume of odontoid process on CBCT images of 138 subjects was measured. In addition, the patients were classified into five age groups. The comparisons between the groups in relation to sex and age were performed by using Mann-Whitney’s test and Kruskal-Wallis’ test, respectively. The ROC curve was used to assess the sensitivity and specificity of the volume to determine the sex. Results: No statistically significant difference was observed between age and volume. Males had significantly larger volumes than females. Values of volume equal to or greater than 1.254 mm3 have sensitivity of 68.2% and specificity of 68.1% to determine male sex. Conclusion: The volume of the odontoid process tends to be larger in males than in females and can be used as sex estimation. Cruzeiro do Sul University (UNICSUL) Department of Diagnosis and Surgery Institute of Science and Technology São Paulo State University (UNESP), São José dos Campos Department of Diagnosis and Surgery Institute of Science and Technology São Paulo State University (UNESP), São José dos Campos

Made available in DSpace on 2019-10-06T15:43:37Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-01-01 This study aimed to investigate the olfactory fossa according to the Keros classification using cone beam computed tomography. This cross-sectional study analysed cone beam computed tomography images selected from a database belonging to a radiology centre. The scans of 174 healthy patients were analysed by using the Xoran software. Gender, age, and side were correlated with the Keros classification. The mean age of the 174 patients was 45.3 years. The most prevalent Keros classification was type II (65.52%), followed by type III (20.69%) and type I (13.79%). No significant differences were found between Keros classification and the variables age, right side (p value = 0.4620), and left side (p value = 0.5709). There were also no significant differences between gender and the variables right side (p value = 0.1421) and left side (p value = 0.2136). Based on these results, we suggest that cone beam computed tomography can be recommended for analysis of the anterior skull base. Keros type II was the most prevalent type in our sample. Postgraduate Program in Dentistry Cruzeiro do Sul University (UNICSUL) Department of Diagnosis and Surgery São José dos Campos Dental School São Paulo State University (UNESP) Department of Orthodontics and Radiology University of São Paulo City (UNICID) Department of Diagnosis and Surgery São José dos Campos Dental School São Paulo State University (UNESP)

Objectives This study was aimed to investigate the relationship between geometric parameters of furcation lesions - maximum area of lesion opening (MALO), angle formed between the roots (ABR), lesion volume (LV) and presence and height of infra-osseous defects (IOD) - and the success of therapy with enamel matrix derivative proteins (EMD) in patients with grade C periodontitis, using cone-beam computed tomography (CBCT). Methods The study consisted of two groups of patients with grade C periodontitis: control (surgery) (n = 17) and test (surgery + EMD) (n = 17). Images parameters on CBCT were recorded using OnDemand3D and ITK-SNAP software. Results Pearson's correlation coefficient demonstrated that only IOD was statistically significant in the probing depth PD (P = 0.01), with a moderate positive correlation (R = 0.59). MALO was found to be statistically significant (P = 0.03) in the test group (surgery + EMD), with moderate negative correlation (R = -0.5). Conclusion The presence of infra-osseous defects and height were relevant in relation to the success of the type of treatment addressed in this study., Cone beam computed tomography; Digital volume tomography; Furcation defect; Furcation involvement; Periodontal regeneration; Periodontal disease.