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Made available in DSpace on 2022-04-28T19:47:30Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01 Objective: The aim of this study was to investigate the TMJ components in patients with juvenile idiopathic arthritis (JIA) and to compare them with a control group based on magnetic resonance imaging (MRI) measurements. Methods: This study comprised an assessment of MRI measurements of 96 temporomandibular joints (TMJ) following classification criteria set by the International League of Associations for Rheumatology (ILAR). Three measurements were considered for study: condyle excursion angle (CEA), height of articular eminence (HAE) and inclination of articular eminence (IAE). All TMJs were assessed by linear measurements made by using the OnDemand 3D software. The comparison between the groups was performed by using Mann–Whitney’s test. Results: Lower measurement values were found for IAE, HAE and CEA in JIA patients (P-values < 0.001, 0.005 and < 0.001, respectively). Conclusion: The study showed the differences in MRI measurements between JIA patients and controls, with the former with the lowest indices. Postgraduate Program in Dentistry Cruzeiro Do Sul University (UNICSUL), Rua Galvão Bueno, 868, Liberdade Rheumatology Department Faculty of Medical Sciences University of Campinas (UNICAMP) Department of Diagnosis and Surgery São José Dos Campos School of Dentistry São Paulo State University (UNESP) Department of Orthodontics Univeritas UNG Department of Oral Medicine and Pathology Institute of Odontology The Sahlgrenska Academy University of Gothenburg Department of Diagnosis and Surgery São José Dos Campos School of Dentistry São Paulo State University (UNESP)

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.

Texture analysis is an image processing method that aims to assess the distribution of gray-level intensity and spatial organization of the pixels in the image. The purpose of this study was to investigate whether the texture analysis applied to cone beam computed tomography (CBCT) images could detect variation in the condyle trabecular bone of individuals from different age groups and genders.The sample consisted of imaging exams from 63 individuals divided into three groups according to age groups of 03-13, 14-24 and 25-34. For texture analysis, the MaZdaNo statistically significant differences were found between age groups for any of the parameters. Males had lower values for the parameter correlation than those of females (P 0.05).Texture analysis proved to be useful to discriminate mandibular condyle trabecular bone between genders.

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)

This study was undertaken to assess in vivo the corrosion in two commercial nickel-titanium (NiTi) orthodontic archwires removed from the oral cavity of patients using fluoride mouthwashes. Five volunteers took part in this study on the corrosion behavior of two brands of NiTi archwires (3M and AO (brand of archwire)) during use of two mouthwashes with neutral sodium fluoride 1.1%, one with acidulated fluoride 1.1%, and one with placebo and a control group. Each patient used one mouthwash in three different periods of time for 1 min a day for 30 days. The archwires were assessed with scanning electron microscopy and atomic force microscopy for qualitative and quantitative analysis. The values obtained with atomic force microscopy (AFM) were submitted to normality test, two-way analysis of variance, and Tukey's test at a significance level of 5%. The AFM images showed a gradual qualitative increase in the roughness of both types of wire between the treatments: control

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.

Objetivo: Determinar o pH crítico para ocorrer a corrosão de arcos NiTi em soluções de flúor a 1,1%, variando o pH de 3,5 a 7,0. Materiais e Métodos: Doze amostras com 10mm de comprimento de fio superelástico NiTi 0017 x 0025 (Abzil), obtidas do segmento distal dos arcos. As amostras foram aleatoriamente separadas e imersas dentro de recipientes contendo 40ml de seis soluções (água, soluções fluoretadas com pH: 3,5; 4,0; 4,5; 5,0; 5,5; 6,0; 6,5 e 7,0), sob uma mesa agitadora durante 90 minutos. Todas as amostras foram, então, levadas ao MEV. As imagens das amostras imersas em água e soluções fluoretadas com pH 7,0, 6,5 e 6,0 não se apresentaram diferentes, no entanto a partir da solução fluoretada com pH 5,5, as imagens superficiais apresentaram características diferentes dos grupos anteriores. Conclusão: Com base nos resultados obtidos neste estudo, o pH crítico para corrosão de arcos NiTi em soluções de flúor a 1,1% parece estar entre 6,0 e 5,5.