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RGO.Revista Gaúcha de Odontologia (Online)

versão On-line ISSN 1981-8637


COLLARES, Fabrício Mezzomo; OGLIARI, Fabrício Aulo; LEITUNE, Vicente Castelo Branco  e  SAMUEL, Susana Maria Werner. Influence of OrmocerTM component on the performance of dentin adhesive systems. RGO, Rev. gaúch. odontol. (Online) [online]. 2010, vol.58, n.4, pp. 445-449. ISSN 1981-8637.

OBJECTIVE: Evaluate the influence of OrmocerTM component on the performance of dentin adhesive systems. METHODS: Microtensile bond strength test in adhesion of adhesive and dentin and characterization of the adhesive interface was done. As control, an adhesive system based on a traditional monomeric system was used. The teeth were embedded in acrylic resin and had their vestibular enamel removed in order to expose the dentin surface closer to the enamel. The exposed dentin was polished with 600 SiC sandpaper for 30s in running water to produce a standardized smear layer. Lower bovine incisors were used in this study, divided in two groups, according the adhesive system used: OrmocerTM based adhesive system and Solobond M adhesive system. On the polymerized adhesive two increments of composite resin were placed to cover the dentin surface completely. After storage for 24 hours in distilled water at 37ºC, the samples were cut to produce two sticks for each tooth, with adhesive interface area of approximately 0.5mm2. Microtensile bond strength values are shown in MPa and fracture analysis with SEM was classified as adhesive, cohesive or mixed. RESULTS: There were no significant differences between OrmocerTM group: 45.11(±14.24) and Solobond M group: 47.36(±11.51), Student's t test (p>0.05). The predominant failure pattern was mixed for the two groups. CONCLUSION: The incorporation of OrmocerTM into dentin adhesives, in comparison with the conventional adhesive system tested did not influence the immediate bond strength.

Palavras-chave : Dentin-bonding agents; Scanning electron microscopy; Tensile strength.

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