Short-term in situ/ex vivo study of the anticariogenic potential of a resin-modified glassionomer cement associated with adhesive systems

• Main Author: Wang, Linda
• Publication Date: 2010
• Other Authors: Honório, Heitor Marques, Rios, Daniela, Botazzo Delbem, Alberto Carlos [UNESP], Palma-Dibb, Regina Guenka, Buzalaf, Marília Afonso Rabelo, Atta, Maria Teresa, Tenuta, Livia Maria Andaló
• Format: Article
• Language: eng
• Source: Repositório Institucional da UNESP
• Download full: http://hdl.handle.net/11449/226245
• topic: Demineralization; Dentin bonding agent; Enamel; In situ

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 × 3 × 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. © 2010 by Quintessence Publishing Co Inc.