RESUMO
Introduction: The Glass Ionomer Cements (GICs) are the most versatile dental material with extensive clinical indication. However, the mechanical strength of conventional GICs (C-GICs) is still unsatisfactory under areas of masticatory forces. Objective: To evaluate the influence of C-GIC proportioning system (powder-liquid and encapsulated) and storage period (1h, 24h and 7 days) on Diametral Tensile Strength (DTS). Material and methods: The two variables were tested in relation to C-GIC (Riva Self Cure, SDI, Australia). The following proportioning systems were tested: powder-liquid by weight (g:g) and powder-liquid by volume (flat scoop: drop) and encapsulated system (pre-dosed capsules). Five C-GIC specimens were prepared, according to ISO specification #9917 for each variable to be studied. The specimens were stored in plastic containers containing distilled water and kept at 37ºC and 100% humidity until the mechanical testing in a universal testing machine (Instron Corp., USA) at a speed 0.5 mm/min. The data were submitted to two-way ANOVA and Tukey test for multiple comparisons (α = 0.05). Results: The proportioning system (P < 0.0001) and storage time (P < 0.0001) were significant predictors of DTS, however with no interaction between these factors. Conclusion: The DTS of C-GICs was influenced by storage time (1 hour < 24 hours < 7 days) and by the proportioning system only for the initial period of its setting reaction.
RESUMO
Introdução: Na perspectiva dos projetos de Universidade Saudável, uma estratégia importante é a avaliação da condição de saúde dos estudantes universitários. No Brasil, um dos grupos vulneráveis é o que reside em moradias estudantis institucionais. Objetivo: Este estudo transversal investiga a condição de saúde bucal, os comportamentos, a autopercepção e os impactos associados em moradores de residências estudantis em uma universidade pública. Material e método: A amostra foi constituída de 68 residentes das quatro Casas de Estudantes Universitários da Universidade Federal de Goiás (UFG), em Goiânia. Os dados foram coletados por meio de exame clínico bucal e entrevista. Resultado: A condição bucal mais prevalente foi a cárie, sendo que 74,6% dos estudantes necessitavam de tratamento para essa condição. A pior condição periodontal observada foi a presença de cálculo (50,8%). A maioria dos estudantes informou que escovava os dentes três vezes ao dia, usava fio dental e necessitava de tratamento odontológico. Dor de dente nos seis meses anteriores à pesquisa foi relatada por 33,8% da amostra; sangramento gengival ao escovar, por 41,2%, e 19,1% afirmaram procurar o serviço odontológico da universidade. O relato de consumo de açúcares entre as refeições foi muito alto e quase 18% fumavam. Mais da metade dos estudantes (51,4%) relatou estar indiferente ou insatisfeita em relação à sua boca e aos seus dentes. O maior impacto da condição bucal foi a dificuldade para comer ou beber, e 19,1% relataram ter faltado à aula em razão de problemas bucais. Conclusão: Os estudantes apresentaram alto percentual de necessidades de tratamento para cárie, bons hábitos de higiene bucal e autopercepção da sua saúde bucal com características negativas.
Introduction: In regard to Healthy University projects, an important strategy is the assessment of university students? health status. In Brazil, a vulnerable group is the one living in university student residences. Objective: This descriptive cross-sectional study aims to investigate the oral health status, behaviors, self-perception and its associated impacts among public university students living in student residences. Material and method: The study population consisted of 68 students who live in four university residences from the Federal University of Goiás in the city of Goiânia. Data were collected through oral clinical examination and interviews. Result: The most prevalent buccal condition was dental caries, and 74.6% of the students had treatment needs for this condition. The worst periodontal condition observed was dental calculus (50.8%). Most of the students reported that they brush their teeth three times a day, use dental floss and need for dental treatment. Dental pain in the last six months was reported by 33.8%, gingival bleeding by 41.2%, and 19.1% had sought the university dental service for treatment. Sugar consumption between meals was very high and almost 18% were smokers. More than half of the students (51.4%) reported being indifferent or dissatisfied with their mouth and teeth. The greatest oral health impact was difficulty for eating or drinking, and 19.1% reported to have missed classes due to oral disorders. Conclusion: Students presented high percentage of treatment needs for caries, good oral hygiene habits, and negative self-perception of their oral health condition.
