Abstract Introduction mass contamination by the new coronavirus caused enough damage for the pandemic to extend indefinitely Objective the objective of this study was to analyze the emotional factors acquired by students from a dentistry course during the COVID-19 pandemic period and the influences related to the resumption of face-to-face activities. Material and method it is an observational, cross-sectional and analytical research conducted at a public university in the state of Pará, Brazil. A research questionnaire, prepared by the authors and validated by the ethics committee of the Federal University of Pará, was applied to the academic community for a period of three months (November 2020 to January 2021). The analysis was performed using the Excel program, Kappa statistics and the Chi-squared test, whose results were presented as frequency and percentage. Result a total of 188 dental students participated in the research. The findings proved to be in accordance with the hypothesis generated by the researchers, about 19.2% had emotional crises and 3.7% increase in the lockdown period. As for the expectations for care services, there was an increase in the oppressive state of psychic crises (anxiety, stress, anger, fear), considered influential in the cognition of behavioral traits during post-pandemic care. Conclusion the study identified that the emotional changes acquired in the pandemic outbreak had a negative impact on student performance; however, depressive symptoms were expressed in graduating students.

Resumo Introdução a contaminação em massa pelo novo coronavírus promoveu danos suficientes para que a pandemia se estendesse por tempo indeterminado. Objetivo analisar os fatores emocionais adquiridos por estudantes do curso de odontologia no período pandêmico COVID-19 e as influências relacionadas ao retorno das atividades presenciais. Material e método pesquisa observacional, transversal e analítica, realizada em uma universidade pública do estado do Pará. Foi aplicado na comunidade acadêmica um questionário de pesquisa, próprio, validado pelo comitê de ética da Universidade Federal do Pará, por um período de 3 meses (novembro de 2020 a janeiro de 2021). Para a análise foi pelo programa Excel, estatísticas Kappa e o teste Qui-quadrado exibidos por frequência e porcentagem. Resultado participaram da pesquisa 188 alunos de odontologia. Os resultados obtidos na pesquisa foram de acordo com a hipótese gerada pelos pesquisadores, cerca de 19,2% e 3,7%, apresentaram crises emocionais elevando-as no período de confinamento. Quanto as expectativas para o atendimento, houve aumento de estado opressivo de crises psíquicas (ansiedade, estresse, raiva, medo), consideradas influentes na cognição dos traços comportamentais durante o atendimento pós pandemia. Conclusão o estudo identificou que as alterações emocionais adquiridas no surto pandêmico desencadearam impacto negativo no rendimento estudantil, todavia, a sintomatologia depressiva esteve expressa em acadêmicos concluintes.

Abstract The aim of this study was to identify the expression of Ki-67 and MCM3 in oral squamous cell carcinoma (OSCC) as well as to address the correlation with patient survival and clinical features. Samples were collected from 51 patients with OSCC who presented for follow-up. Immunohistochemical expression of Ki-67 and MCM3 in all groups was performed. The scoring system was previous published by Tsurutani in 2005. We used Kappa index to evaluate observers agreement degree. The associations between protein expression and clinical variables were examined for statistical significance using the chi-squared test. The overall survival rates were estimated by the Kaplan-Meier method and the relationship between protein expression and survival was compared using the log-rank test (p < 0.05). The overall survival time for a patient with positive immunostaining for Ki-67 is shorter than for a patient with negative immunostaining, (log-rank test, p = 0.00882). Patients with tumor size T3 and T4 showed a statistically significant relationship with Ki-67 immunoexpression (log-rank test, p = 0.0174). The relationship between Ki-67 expression and the relation between age, gender, smoking, tumor site, lymph node metastasis and disease stage was not significant. The examiners agreement degree by Kappa presented p value < 0.05. There was not a significant correlation when we evaluated MCM3 expression regarding clinical characteristics and survival rate. From these results, the present study suggests that positive Ki-67 expression found in OSCC patients may contribute to predict the survival in OSCC samples, as well as the relation between the protein and the tumor size.

ResumoIntroduçãoO conhecimento das estruturas anatômicas localizadas na região entre os forames mentuais é de importância crucial nos planejamento pré-operatórios.ObjetivoAvaliar a posição do forame mentual relacionado aos ápices dos dentes, sua distância aos bordos da mandíbula com uso da tomografia computadorizada de feixe cônico.Material e métodoForam avaliadas 100 tomografias computadorizadas de feixe cônico da mandíbula realizada num único aparelho de tomografia. Cada imagem escolhida foi avaliada de forma repetida para ambos os lados da mandíbula, a posição do forame mentual, indicando a região em que o forame se encontrava e as medidas do forame mentual a cortical lingual e base da mandíbula. Os dados foram analisados inicialmente de forma descritiva. Um valor de p<0,05 foi escolhido como o nível de significância.Resultado42% dos forames mentuais estavam localizados no ápice do segundo pré-molar. A margem lingual do forame mentual localizou-se em média de 3,1 mm a partir da cortical lingual. A margem inferior do forame mentual foi localizada 7,25 mm acima da borda inferior da mandíbula.ConclusãoO forame mentual localizou-se com maior frequência em nível dos ápices dos segundos pré-molares, com distância à cortical lingual, em média, de 3,1 mm e base da mandíbula, em média, de 7,25 mm.

AbstractIntroductionKnowledge of the anatomical structures located in the region between the mental foramina is of critical importance in pre-operative planning.ObjectiveTo evaluate the position of the mental foramen relative to the apices of the teeth and the distance to the edges of the mandible, using cone beam computerized tomography.Material and methodOne hundred cone beam computerized tomographs of the mandible were evaluated; the tomographs were taken using a single tomographic device. Each image chosen was evaluated repeatedly from both sides of the mandible, the position of the mental foramen, indicating the region in which the foramen was found and the measures of the mental foramen, the lingual cortex and the mandibular base. Initially, the data were analyzed descriptively. A value of p<0.05 was chosen as the level of significance.ResultForty-two percent of the mental foramina were located in the apex of the second pre-molar. The lingual margin of the mental foramen was located, on average, 3.1mm from the lingual cortex. The lower margin of the mental foramen was located 7.25 mm above the lower edge of the mandible.ConclusionThe mental foramen was located more frequently at a level of the apices of the second pre-molars, with a distance to the lingual cortex, on average, of 3.1mm and to the base of the mandible, on average, of 7.25 mm.