ABSTRACT Objective: To compare the pulp vitality of deciduous molars before and after selective caries removal (SCR) or nonselective caries removal to hard dentin (NSCR) over one year, using oxygen saturation percentage (%SaO2). Material and Methods: Deciduous molars with deep occlusal/proximal-occlusal caries lesions were randomized to SCR (n=22) or NSCR groups (n=22). After the caries removal, the teeth were protected with calcium hydroxide cement and restored with composite resin (Filtek Z250). The pulp condition diagnosis was evaluated at baseline, immediately after caries removal, and follow-up (7 days, 1-, 6- and 12-months) by %SaO2. Pulp exposure and pulp necrosis were primary outcomes, and %SaO2 was secondary. Results: Intraoperative pulp exposure occurred in four teeth of the NSCR group (18.2%) and one tooth of the SCR group (4.5%) (p>0.05). Two cases of pulp necrosis occurred in the NSCR group (10%). No difference in %SaO2 pulp was observed in the inter-and intragroup comparison over time (p>0.05). Conclusion: Advantageously, the %SaO2 minimizes preoperatory pulp vitality diagnosis subjectivity before SCR/ NSCR treatments. Furthermore, the pilot study results suggest the pulp response of deciduous molars, when evaluated by clinical, radiographic, and pulp %SaO2 seems not to differ between teeth treated with SCR or NSCR.

Abstract This study was conducted to assess the clinical effect of photodynamic therapy (PDT) in the decontamination of the deep dentin of deciduous molars submitted to partial removal of carious tissue. After cavity preparation, dentin samples were taken from the pulp wall of nineteen deciduous molars before and after PDT application. Remaining dentin was treated with 0.01% methylene blue dye followed by irradiation with an InGaAlP diode laser (λ – 660 nm; 40 mW; 120 J/cm2; 120 s). Dentin samples were microbiologically assessed for the enumeration of total microorganisms, Lactobacillus spp. and mutans streptococci. There was no significant difference in the number of colony-forming units (CFU) for any of the microorganisms assessed (p > 0.05). Photodynamic therapy, using 0.01% methylene blue dye at a dosimetry of 120 J/cm2 would not be a viable clinical alternative to reduce bacterial contamination in deep dentin.

INTRODUÇÃO: O câncer oral é uma doença multifatorial com alta incidência no mundo, que vem sendo considerado problema de saúde pública, sendo a prevenção e o diagnóstico precoce as melhores formas de reverter essa situação. OBJETIVO: Avaliar o nível de conhecimento sobre o câncer oral em uma população de estudantes de odontologia. MÉTODO: Um questionário sobre o câncer de boca foi aplicado a 150 alunos de seis turmas, divididos em três grupos de acordo com o semestre letivo. As variáveis estudadas foram analisadas estatisticamente aplicando-se o teste do Qui-quadrado com intervalo de confiança de 95%, e nível de significância de 5%. RESULTADO: Oitenta e oito alunos (60,61%) consideraram seu nível de conhecimento sobre câncer oral bom ou regular, enquanto 37,93% avaliaram seu conhecimento como insuficiente. O carcinoma espinocelular foi considerado o câncer mais comum por apenas 38,25% do total de estudantes, sendo o percentual maior de acerto para os grupos 2 (55,56%) e 3 (67,39%). O nível de conhecimento sobre os fatores de risco aumentou ao longo dos semestres, entretanto, 77,85% consideram baixo o seu nível de confiança para realizar procedimentos de diagnóstico. CONCLUSÃO: O nível de conhecimento sobre câncer oral foi considerado bom ou regular entre os estudantes de odontologia entrevistados; apesar de demonstrarem um bom nível de conhecimento em relação aos fatores de risco e a questões específicas da doença, ficou clara a necessidade de implementar medidas educativas continuadas ao longo do curso de forma a consolidar o ensino sobre essa patologia.

INTRODUCTION: Oral cancer is a multifactorial disease of high incidence worldwide and considered a public health problem, in which prevention and early diagnosis are the best ways to reverse this situation. PURPOSE: To evaluate the level of knowledge on oral cancer in a population of dentistry students. METHOD: A questionnaire on oral cancer was applied to 150 students from six classes, divided into three groups according to their semesters. The variables studied were statistically analyzed by applying the chi-square test with confidence interval of 95% and significance level of 5%. RESULT: Eighty-eight students (60.61%) considered their level of knowledge on oral cancer good and regular, while 37.93% rated their knowledge as insufficient. Squamous cell carcinoma was listed as the most common cancer by only 38.25% of students, with the highest percentage of correct answers being observed for groups 2 (55.56%) and 3 (67.39%). The level of knowledge on the risk factors increased over the semesters; however, 77.85% considered their level of confidence to perform diagnostic procedures low. CONCLUSION: The level of knowledge on oral cancer was considered good or regular among dentistry students, and although they showed good level of knowledge on the risk factors and to specific issues of the disease, there is a clear need to implement continued educational measures throughout the course to consolidate learning on this disease.