Repeated testing and rinsing regimens for toothpastes with various cooling and burn intensities: impact on discrimination and repeatability
Descriptive sensory studies were used to (1) determine the impact of rinsing on residual cooling from strongly mentholated toothpaste and (2) the effect of interstimulus delay on discrimination and repeatability of scores for mint-flavored toothpastes. The panelists brushed their teeth and evaluated residual cooling and burn. In the first experiment, rinsing with crackers and water reduced the time needed to reach a negligible score compared to no rinse or a water only rinse. In the second experiment, samples were evaluated with interstimulus delays from 4 to 24 min. Discrimination of oral cooling was more consistent with longer interstimulus delays, but even with a 24-min regimen, oral burn sometimes demonstrated slight, but significant, sensitization, a carry-over effect. These results suggest that testing toothpaste products, and perhaps other products with high levels of cooling, requires considerable time between testing, which limits the number of samples that can be tested in a single session.
Reference Information:
Allison, A.A., Chambers, E. IV., and Chambers, D.H. 2007. Repeated testing and rinsing regimens for toothpastes with various cooling and burn intensities: impact on discrimination and repeatability. J. Sensory Stud. 22: 695-712.
This entry was posted on Wednesday, May 14th, 2008. It is filed under Human Nutrition and is tagged with cooling, descriptive, menthol, rinse, sensory, toothpaste.