Abstract:

The whitening effect of oral care products refers to the whitening effect achieved by removing stains, pigments and plaque on the surface of teeth. Commonly used oral whitening care products include whitening toothpaste, mouthwash, whitening tooth strips, whitening gels, etc. It is evident that whitening effect remains the primary concern of consumers from the market share of oral care products. At home and abroad, there are numerous reports of false advertising and exaggerated efficacy of oral care products for whitening, which trigger high social attention and affect the development of oral care industry. Therefore, the establishment of a complete efficacy evaluation system not only meets the market demand, but also helps to improve the scientific supervision level of products with whitening efficacy claims. The design principles, experimental procedures, detection techniques and result analyses of laboratory methods for assessing the whitening efficacy of oral care products are reviewed, focusing on both domestic and international approaches. The four dimensions of model preparation, staining method, whitening process and application evaluation are compared to standardize the whitening efficacy assessment methods for oral care products. Scientific and rigorous standardization suggestions are put forward, which provide data support for the establishment of a complete set of laboratory methods for efficacy testing of oral whitening care products.

Key words: teeth, whitening, exogenous staining, in vitro study