The initial viscosity and adhesive strength of denture adhesives and oral moisturizers

Purpose: The purpose of this study was to determine the initial viscosity and adhesive strength of commercial denture adhesives and oral moisturizers. Materials and Methods: Four cream-type denture adhesives, one gel-type denture adhesive and three gel-type oral moisturizers were used in the study. The initial viscosity was measured using a controlled-stress CarriMed CSL500 rheometer. The adhesive strength was measured according to the ISO-10873 recommended procedures using a constant load compression testing machine and a materials testing machine. Results: Significant differences in initial viscosity were found among the materials (p<0.05). Similar viscosity values were recorded in all materials except Tafugrip Gel and Corect Cream. The adhesive strength of denture adhesives increased significantly with time, but the adhesive strength of oral moisturizers decreased significantly with time. Conclusion: Cream-type denture adhesives and gel-type oral moisturizers exhibit similar initial viscosity, and denture adhesives and oral moisturizers function with different adhesion behaviors. (Asian Pac J Dent 2011; 11: 45-50.)