Abstract Objective To evaluate the efficacy of Nd:YAG laser associated with calcium-phosphate desensitizing pastes on dentin permeability and tubule occlusion after erosive/abrasive challenges. Methodology Dentin specimens were exposed to 17% ethylene diamine tetra-acetic acid (EDTA) solution for 5 min and randomly allocated into five groups: G1, control (no treatment); G2, Nd:YAG laser (1 W, 10 Hz, 100 mJ, 85 J/cm2); G3, Laser + TeethmateTM Desensitizer; G4, Laser + Desensibilize Nano P; and G5, Laser+Nupro®. Specimens underwent a 5-day erosion-abrasion cycling. Hydraulic conductance was measured post-EDTA, post-treatment, and post-cycling. Post-treatment and post-cycling permeability (%Lp) was calculated based on post-EDTA measurements, considered 100%. Open dentin tubules (ODT) were calculated at the abovementioned experimental moments using scanning electron microscopy and ImageJ software (n=10). Data were analyzed using two-way repeated measures ANOVA and Tukey’s test (α=0.05). Results G1 presented the highest %Lp post-treatment of all groups (p<0.05), without significantly differences among them. At post-cycling, %Lp significantly decreased in G1, showed no significant differences from post-treatment in G3 and G4, and increased in G2 and G5, without significant differences from G1 (p>0.05). We found no significant differences in ODT among groups (p>0.05) post-EDTA. At post-treatment, treated groups did not differ from each other, but presented lower ODT than G1 (p<0.001). As for post-cycling, we verified no differences among groups (p>0.05), although ODT was significantly lower for all groups when compared to post-EDTA values (p<0.001). Conclusion All treatments effectively reduced dentin permeability and promoted tubule occlusion after application. Combining Nd YAG laser with calcium-phosphate pastes did not improve the laser effect. After erosive-abrasive challenges, treatments presented no differences when compared to the control.

RESUMO O objetivo principal foi verificar os níveis de atividade física, sintomas depressivos e ansiedade de estudantes de Educação Física, bem como verificar a relação entre os níveis de atividade física e depressão e ansiedade entre universitários deste curso. Os dados foram coletados em uma instituição de ensino particular, na qual foram aplicados instrumentos para avaliação do nível de atividade física (Questionário Internacional de Atividade Física) em sua versão curta, depressão (Inventário Beck de Depressão) e ansiedade (Inventário Beck de Ansiedade). Foram coletados também dados sociodemográficos. Análises descritivas e de comparação foram realizadas. Participaram da pesquisa 150 alunos, sendo 52 mulheres e 98 homens com idade entre 18 a 45 anos (média = 22,85; desvio padrão = 4,80). Os resultados revelaram que 18% dos alunos possuem baixo, 20% moderado e 60% alto nível de atividade física. Dentre os universitários, 76% foram categorizados com mínimo de sintomas depressivos e 65% apresentaram níveis moderados de ansiedade. Não foram identificadas diferenças estatísticas entre os níveis de atividade física com depressão (p = 0,163) e ansiedade (p = 0,545). Conclui-se que não houve relação entre os graduandos de Educação Física ansiosos ou depressivos com seus níveis de atividade física.

ABSTRACT The main objective was to verify the levels of physical activity, depressive symptoms and anxiety of Physical Education students, as well as to verify the relationship between the levels of physical activity and depression and anxiety among university students in this course. The data were collected in a private educational institution. We collected data to assess the level of physical activity (International Physical Activity Questionnaire) in its short version, depression symptoms (Beck Depression Inventory) and anxiety (Beck Inventory Anxiety). Sociodemographic data were also collected. Descriptive and comparative analyses were performed. 150 students participated in the research, 52 women and 98 men aged 18 to 45 years (mean = 22.85; standard deviation = 4.80). The results revealed that 18% of students have low, 20% moderate and 60% high level of physical activity. Among college students, 76% were categorized with minimal depressive symptoms and 65% had moderate levels of anxiety. No statistical differences were identified between levels of physical activity with depression (p = 0.163) and anxiety (p = 0.545). It was concluded that there was no relationship between anxious or depressed Physical Education students with their levels of physical activity.