Objective: The objective of this study was to evaluate the extrinsic stain removal efficacy of two sensitivity relief toothpastes containing 8.0% arginine, calcium carbonate, and 1450ppm MFP. One contained a high cleaning calcium carbonate system,(Test), the other contained standard calcium carbonate, (Control) over an eight week period of twice daily product use.
Methods: 100 healthy volunteers were recruited for an eight week, two-cell, double-blind, randomized clinical study. Using the standard method described by Lobene, teeth were scored for changes in stain area and intensity.
Results: The stain area for the Test product reduced from 2.42 (0.48) at baseline to 2.03 (0.57) to1.56 (0.61) for a 16% reduction at 4 weeks and a 35% reduction at 8 weeks, respectively. The stain area for the Control product reduced from 2.42 (0.47) at baseline to 2.3 (0.56) to 1.97 (0.63) for a 4.8% reduction at 4 weeks and an 18% reduction at 8 weeks. The stain intensity for the Test product reduced from 2.05 (0.53) at baseline to 1.58(0.53) to 1.24 (0.46) for a 23% reduction at 4 weeks and 39.5% reduction at 8 weeks. The stain intensity for the Control dentifrice reduced from 2.06(0.47) at baseline to 1.75(0.5) to 1.51(0.5) for a 15% reduction at 4 weeks and 27% reduction at 8 weeks.
Conclusion: The new breakthrough dentifrice technology for everyday relief of dentin hypersensitivity with stain prevention ingredients effectively delivers a whitening benefit.