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Quintessence International



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Quintessence Int 41 (2010), No. 10     6. Oct. 2010
Quintessence Int 41 (2010), No. 10  (06.10.2010)

Online Article, Page 884, PubMed:20927415

Online Article: Short-term in situ/ex vivo study of the anticariogenic potential of a resin-modified glass-ionomer cement associated with adhesive systems
Wang, Linda / Honório, Heitor Marques / Rios, Daniela / Delbem, Alberto Carlos Botazzo / Palma-Dibb, Regina Guenka / Buzalaf, Marília Afonso Rabelo / Atta, Maria Teresa / Tenuta, Livia Maria Andaló
Objective: As resin-modified glass-ionomer cement (RMGIC) is an adhesive material, its association to dentin bonding agents (DBAs) was previously proposed. This study investigated the adjunctive behavior of an RMGIC with etch-and-rinse bonding systems under in situ/ex vivo cariogenic challenge.
Method and Materials: Bovine enamel blocks (3 x 3 x 2 mm) were randomly assigned to group VP, Vitremer + its own primer (3M ESPE); group VSB, Vitremer + Single Bond (3M ESPE); and group VPB, Vitremer + Prime & Bond 2.1 (Dentsply). Two blocks of each group were randomly placed in an acrylic palatal appliance, so each appliance included six blocks. Volunteers (n = 10) wore these appliances according to given instructions to promote a sucrose challenge eight times/day for 15 days. After this period, the blocks were removed from the devices and cleaned, and demineralization was assessed through longitudinal microhardness analysis (Knoop indenter, 25 g/5 s). Data were submitted to three-way ANOVA and Tukey test (P < .05).
Results: No treatment was able to completely avoid demineralization. All materials showed a statistically significant difference in mineral loss when the microhardness on the outer enamel was compared with deeper regions (P < .05).
Conclusion: Association of the tested RMGICs with etch-and-rinse DBAs did not seem to be more beneficial against caries than the conventional treatment with RMGIC.

Keywords: demineralization, dentin bonding agent, enamel, in situ