Influence of notebook computers screens and undergraduate level of dental students in the radiographic detection of carious lesions

Aim: To evaluate the influence of notebook computers screens and undergraduate level of dental students in the radiographic detection of carious lesions. Methods: Bitewing digital radiographs were presented to 3rd and 5th year dental students in three different notebooks computers: Notebook 1 with anti-glare screen (1366×768 pixels), Notebook 2 without anti-glare screen (1366×768 pixels), and Notebook 3 with anti-glare screen (1920×1080 pixels). A reference standard based on a consensus analysis was set by three senior professors of Oral Radiology and Cariology. Sensitivity, specificity and accuracy values were measured and submitted to two-way ANOVA at a significance level of 5%. Results: Notebook 2 provided significantly lower sensitivity values (Mean 56.5% ± 2.94) than notebook 3 (71.1% ± 2.82) (p = 0.002). We found no statistically significant differences between the two undergraduate years (p > 0.05). Conclusion: The anti-glare screen of notebook computers screens can influence the radiographic detection of carious lesions, but the undergraduate level of dental students does not influence this diagnostic task

Avaliação do cimento resinoso autoadesivo como tampão cervical para clareamento interno / Evaluation of a self-adhesive resin cement as a cervical barrier in intracoronal bleaching

Objetivo: Avaliar capacidade seladora de um cimento resinoso autoadesivo como tampão cervical para clareamento interno. Métodos: Quarenta incisivos inferiores bovinos recém-extraídos foram tratados endodonticamente. Após 72 horas, foi realizada a desobturação parcial do canal radicular para confecção de tampão cervical dividido em quatro grupos aleatório (n = 40), cada um contento dez amostras (n = 10), com os seguintes materiais: cimento resinoso autoadesivo, cimento resinoso adesivo, cimento de óxido de zinco sem eugenol com presa por água e cimento de ionômero de vidro quimicamente ativado (grupo controle). Após 24 horas de presa dos materiais, os elementos dentais foram submetidos ao clareamento interno com perborato de sódio misturado com água destilada pelo período de 7 dias em câmara umidificadora a 37 ºC. Posteriormente, o material clareador foi removido e um corante (fucsina básica 0,5%) foi colocado no interior da câmara pulpar, sendo renovado de 8 em 8 horas, pelo período de 24 horas. Os elementos dentais foram seccionados no sentido longitudinal em máquina de corte para avaliação quantitativa em um microscópio óptico sob aumento de 20x. O grau de penetração do corante foi analisado ao longo do tampão cervical (topo até base). Resultados: Não houve diferença significativa entre os materiais tamponantes utilizados (p = 0,5997). Conclusão: O cimento resinoso autoadesivo apresentou baixo grau de infiltração, sendo uma opção de material alternativo com finalidade de tampão cervical.

Aim: To evaluate the sealing ability of a self-adhesive resin cement as a cervical barrier for internal bleaching. Methods: Forty recently extracted bovine lower incisors were endodontically treated. After 72 hours, partial disobturation of the root canal was performed, a cervical barrier was placed, and the teeth were divided into four random groups (n = 40), each containing ten samples (n = 10), using the following materials: self-adhesive resin cement, adhesive resin cement, zinc oxide cement without eugenol cured by water, and chemically activate glass ionomer cement (control group). Twenty-four hours after the materials were cured, the teeth were subjected to internal bleaching with sodium perborate and distilled water for a period of seven days in a humidified chamber at 37°C. After, the bleaching material was removed and a dye (0.5% basic fuchsin) was placed inside the pulp chamber and renewed every eight hours for a period of 24 hours. The teeth were sectioned longitudinally in a cutting machine for quantitative evaluation using an optical microscope under 20x magnification. The degree of dye penetration was evaluated through the cervical barrier (top to bottom). Results: No significant difference was observed among the cervical barrier materials used in this study (p = 0.5997). Conclusion: The self-adhesive resin cement had low degree of leakage and represents an alternative material option to be used as a cervical barrier.

Avaliação do conhecimento prévio e adquirido sobre cárie dentária em graduandos de Odontologia da Universidade Federal do Espírito Santo ­ UFES / Evaluation of previous and acquired knowledge about dental caries from undergraduate dentistry students from the Federal University of Espirito Santo ­ UFES

Objetivo: Avaliar conhecimento prévio e adquirido sobre cárie dentária de graduandos em Odontologia da Universidade Federal do Espírito Santo ­ UFES. Material e Métodos: Este estudo exploratório teve como grupo amostral (N = 121) acadêmicos de Odontologia do 1o ao 8o períodos. Um questionário sobre os conhecimentos prévios e adquiridos sobre cárie dentária foi aplicado aos estudantes. A análise dos dados foi realizada de forma descritiva (frequências absolutas e relativas) e analítica (testes qui-quadrado e McNemar; p < 0,05). Resultados: Foi observado que quanto ao conceito da cárie dentária, 52,9% adquiriram de 1ª a 4ª séries, e 31,4% de 5ª a 8ª séries. Maior parte do conhecimento obteve-se da graduação em Odontologia (38,8%), da casa/família (28,1%) e dentista particular (13,2%). Os alunos afirmaram que o conhecimento foi aplicado na prática diária (90,1%) e melhorou a própria saúde bucal (95,0%). Foi observada diferença significativa nas respostas quanto à consequência da cárie dentária e necessidade de restauração entre alunos do início do curso (1º período) e do meio e final do curso (4º e 8º períodos) (qui-quadrado; p < 0,05). No entanto, não houve diferença estatística entre os alunos do 4º e 8º períodos. Quanto ao conhecimento sobre cárie dentária dos acadêmicos do 4º período "antes" e "após'' a inserção no curso de Odontologia, observou-se melhora estatisticamente significante após o ingresso na faculdade (McNemar; p < 0,05). Conclusão: Estudantes passaram adquirir conhecimento efetivo sobre cárie dentária somente após ingressarem na faculdade, tornando-se evidente após o 4º período do curso. Houve relevância das informações coletadas com prática de saúde bucal.(AU)

Aim: To evaluate the knowledge about dental caries that had been acquired both previously and during the undergraduate Dentistry course at the Federal University of Espírito Santo (UFES). Methods: This exploratory study was conducted with a sample group (n = 121) of undergraduate Dentistry students from the first to eighth semesters. A questionnaire about the knowledge of dental caries acquired before and during the Dentistry course was applied to the students. Data was analyzed by descriptive (absolute and relative frequencies) and analytical (chi-square test and McNemar test; p < 0.05) statistics. Results: It was observed that 52.9% of the students had learned about the concept of caries in elementary school, while 31.4% reported having learned about the concept during middle school. A large percentage of the students (38.8%) responded that they had acquired most of their knowledge about dental caries during Dental School, while 28.1% and 13.2% stated that it was from their home/family and private dentist, respectively. For 90.1% of the students, their knowledge about dental caries is used on a daily basis, and 95% reported that this knowledge improved their oral health. A significant difference was observed in the responses from first-year students (first period) when compared to the students from the middle (fourth period) and final (eighth period) years of the course as regards the consequences of dental caries and the need for restoration (chi-square, p < 0.05). However, no statistical difference was observed between fourth and eighth periods. Comparing the overall knowledge about dental caries before and during dental school, a significant improvement was observed only after the fourth period (McNemar test, p < 0.05). Conclusion: Relevant knowledge about dental caries was mostly acquired by the students during dental school, especially after the fourth period. Relevance from the collected data and improvement of oral self-care were also observed.(AU)