Effect of Magnification during Post Space Preparation on Root Cleanness and Fiber Post Bond Strength.

The aim of this study was to evaluate the effect of magnification during post space preparation on root cleanness and on fiber post bond strength. Methods: Thirty human central upper incisors with similar root canal in size and shape were selected, decoronated to 15 mm and endodontically filled. The teeth were assigned into 3 groups (n=10), according to the method of magnification during post space preparation inspection: Control, using naked eye; loupe, using a dental surgical 3x magnifying glass; surgical microscope, using a 6x surgical microscope. The roots were scanned by using micro-CT before and after post space preparation for residue remnants evaluation. Fiber posts were cemented using self-adhesive resin cement (Rely X U200, 3M-ESPE). Two 1-mm-thick slices from the cervical, medium and apical thirds were submitted to a push-out test (PBS). Failures modes were classified. PBS data were analyzed by using two-way ANOVA with repeated measurement and the Tukey test. The significance level was set at 5%. The method of visualization had no effect on PBS (p=0.556). The cervical region had higher values than apical region irrespective of the inspection method (p=0.012). Adhesive failure between the resin cement and dentin was the prevalent failure mode for all groups. Micro-CT analysis showed no difference on root cleanness into the root canal after post space preparation. The use of magnification devices as loupe and microscope while performing post space do not improve the PBS and did not affect sealer remain of decoronated anterior teeth.

Autopercepção da saúde bucal de universitários fumantes, não fumantes e fumantes passivos / Self-perception of oral health of smoking, non-smoking and passive smoking university students

Este estudo teve como objetivo analisar a autopercepção da saúde bucal de universitários adultos jovens, correlacionando-a com status tabágico. Foi um estudo transversal com universitários entre 18 e 21 anos. Cada estudante, ao concordar em participar da pesquisa, preencheu um questionário sobre suas experiências com o tabagismo, percepção de saúde bucal e necessidade de tratamento odontológico. Em seguida, cada participante expirou em um monoxímetro, aparelho que avalia a presença de monóxido de carbono na respiração, para confirmação do status tabágico autorreferido. Foram aplicados 103 questionários, dos quais 4 foram excluídos devido a discrepâncias entre o status tabágico autorreferido e o resultado do monoxímetro, restando 99 participantes (49 do sexo feminino e 50 do masculino), idade média 18,7±1,1 anos. Quanto ao status tabágico confirmado pelo monoxímetro, 54 (54,5%) participantes nunca fumaram nem experimentaram cigarros; 29 (29,3%) não fumavam, mas experimentaram cigarros; 6 (6,1%) não fumavam, mas fumaram no passado; e 10 (10,1%) eram fumantes. Quanto à exposição ao tabagismo passivo, 38 (38,4%) participantes se declararam expostos. Em relação à autopercepção da saúde bucal, 1,9% dos participantes não fumantes, 10% dos fumantes e 3,2% dos fumantes passivos classificaram sua saúde bucal como ruim; 5,6%, 10% e 6,4% classificaram sua necessidade de tratamento odontológico como muita, respectivamente (diferenças estatísticas não significativas, alpha=0,05). Concluiu-se que a prevalência do tabagismo observada entre participantes desta pesquisa ficou abaixo da média nacional entre universitários. Quanto à autopercepção de saúde bucal e necessidade de tratamento, não houve diferença em relação ao status tabágico.

This study aimed to analyze the self-perception of oral health of young adult university students, correlating it with smoking status. It was a cross-sectional study with university students between 18 and 21 years old. Each academic, after agreeing to participate in the research, completed a questionnaire about their experiences with smoking, perception of oral health and need for dental treatment. Then, each participant expired on a monoximeter, equipment that measures the presence of carbon monoxide in the breath, to confirm the self-reported smoking status. There were administered 103 questionnaires, which 4 were excluded due to discrepancies between the self-reported smoking status and the monoximeter result, totaling 99 participants (49 were female and 50 male), mean age 18.7±1.1 years. About the smoking status confirmed by the monoximeter, 54 (54.5%) participants had never smoked or tried cigarettes; 29 (29.3%) did not smoke but tried cigarettes; 6 (6.1%) did not smoke but smoked in the past; and 10 (10.1%) were smokers. About the exposure to passive smoking, 38.4% declared themselves exposed. About the self-perception of oral health, 1.9% of non- smoking participants, 10% of smokers and 3.2% of passive smokers reported having bad oral health and 5.6%, 10% and 6.4% reported much need for dental treatment, respectively (statistical differences not significant, alpha=0,05). It was concluded that the prevalence of smoking observed among participants of this study was below the national average for university students. About the self-perception of oral health and the need for dental treatment, no difference was observed in smoking status.