RESUMO
ABSTRACT: The aim of this study was to analyze the bond strength of total-etch and self-etch adhesive systems to dentin of primary and permanent teeth. Methods: Thirty sound naturally exfoliated primary molars deciduous teeth (DT) and thirty sound permanent bicuspids permanent teeth (PT) were randomly divided into six groups (n=10 per group) according to two commercial adhesive systems: Adper Single Bond 2; 3M ESPE (Total-etch) and Adper Easy Bond; 3M ESPE (selfetch and total-etch). Specimens submitted to cyclic loading in a universal Instron testing machine. Bond strength values (MPa) were analyzed by ANOVA test and Duncan post hoc test (a=0.05). Results: Mean values were higher in PT compared to DT. In deciduous teeth, no significantly differences observed. Total etch AdperTM Single Bond 2 showed significantly higher bond strength than self-etch AdperTM with additional acid etching in PT (p=0.031). Conclusion: Our findings suggest that the highest bond strength was found in dentin tissue of PT with total etch AdperTM employing the adhesive the Single Bond 2 of one step self-etch.
RESUMEN: El objetivo de este estudio fue analizar la fuerza de unión de los sistemas adhesivos de grabado total y autograbado a la dentina de los dientes primarios y permanentes. Métodos: treinta sonidos exfoliaron naturalmente los molares primarios dientes caducifolios (DT) y treinta sonidos. Los dientes permanentes de los premolares permanentes (PT) se dividieron aleatoriamente en seis grupos (n = 10 por grupo) de acuerdo con dos sistemas adhesivos comerciales: Adper Single Bond 2; 3M ESPE (Grabado total) y Adper Easy Bond; 3M ESPE (autograbado y grabado total). Muestras sometidas a carga cíclica en una máquina universal de pruebas Instron. Los valores de resistencia de la unión (MPa) se analizaron mediante la prueba ANOVA y la prueba post hoc de Duncan (a = 0.05). Resultados: Los valores medios fueron mayores en PT en comparación con DT. En dientes deciduos, no se observaron diferencias significativas. Total etch AdperTM Single Bond 2 mostró una fuerza de unión significativamente mayor que la autograbado AdperTM con grabado ácido adicional en PT (p = 0.031). Conclusión: Nuestros hallazgos sugieren que la mayor fuerza de unión se encontró en el tejido de dentina de PT con grabado total AdperTM empleando el adhesivo Single Bond 2 de autograbado de un solo paso.
Assuntos
Humanos , Colagem Dentária , Adesivos Dentinários , Cimentos Dentários/classificação , Cimentos Dentários/química , Dente Decíduo , Técnicas In Vitro , Adesivos , Dentição Permanente , Resistência ao Cisalhamento , Dente MolarRESUMO
The continual rise of anthropogenic disturbance of ecosystems has been associated with an increasing incidence of emerging diseases. The largest amount of data on emerging diseases relates to bacterial and viral pathogens, but there is a lack of parasite data, especially from wildlife. Monitoring wildlife parasitic diseases should be considered a priority, especially in high biodiversity regions with strong anthropogenic impacts, like Mexico, where the wildlife/livestock/human interface is associated with increased risk of disease transmission. Mexico belongs to the top-ten megadiverse countries and is located between two biogeographic regions. This situation makes Mexico a favourable region for the spillover of animal pathogens to human beings, causing pandemics, such as the one recently caused by influenza virus A (H1N1). The current state of knowledge of Mexican wildlife parasites is scarce and focuses mainly in Neotropical fauna. Moreover, this knowledge is heterogeneous for different parasite groups, especially concerning their pathologic effects and epidemiology. The goals of this review are to compile information on Mexican wildlife parasites and to identify knowledge gaps in order to stimulate research on pending epidemiological, public health, ecological and pathological areas, and to encourage the creation of more specialized groups from the perspective of the One-Health concept.