Author:
Zehnder Matthias,Masoch Luca,Gubler Andrea,Mohn Dirk,Attin Thomas,Wegehaupt Florian J.
Abstract
It has been speculated that the diluent used to test toothpaste abrasivity in standard tests may have an impact on their results, especially in the context of acidic toothpastes. This study tested whether an acidic toothpaste is indeed more abrasive than a neutral counterpart of otherwise identical composition, and whether this increased abrasivity is prevented by a buffered solution simulating saliva. Two experimental toothpastes of identical composition yet different pH (7.0 vs. 5.0) were prepared using standard ingredients. Subsequently, they were tested in standard absolute dentin abrasion and relative dentin abrasivity (RDA) experiments. To prepare slurries for these tests, deionized water as recommended by the International Organization for Standardization (ISO 11609:2017) was used, or a buffer solution containing bicarbonate and phosphate. The pH in these slurries was assessed and compared to the pH obtained in oral slurries of healthy individuals. Results showed that a significant (one-way ANOVA, p < 0.05) increase in mean absolute dentin abrasion and RDA values by 35 and 14%, respectively, was obtained when water was used as the diluent in conjunction with the acidic toothpaste as compared to the buffer solution. This was not the case with the neutral toothpaste. This result was explained by the finding that the buffer solution neutralized the pH in experimental slurries of the acidic toothpaste, while deionized water was unable to elevate the pH of the acidic toothpaste. That toothpaste was also neutralized in oral slurries. It was concluded that indeed the current ISO standard may result in a systematic overestimation of acidic toothpaste abrasivity.
Reference28 articles.
1. Geneva, Switzerland2017
2. A laboratory method for assessment of dentrifrice abrasivity;Hefferren;J Dent Res.,1976
3. A new profilometric method for determination of enamel and dentinal abrasion in vivo using computer comparisons: a pilot study;Noordmans;Quintessence Int.,1991
4. The measurement of the abrasion of human teeth by dentifrice abrasives: a test utilizing radioactive teeth;Grabenstetter;J Dent Res.,1958
5. A critical comparison of dentifrice abrasion scores on dentine recorded by gravimetric and radiotracer methods;Barbakow;J Dent.,1992
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献