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Silica as a reference for laboratory dentifrice assessment methods: multiple site collaborative study.

J J Hefferren1, B Schemehorn, A Storeck

  • 1University of Kansas, Lawrence, USA. hefferen@ku.edu

The Journal of Clinical Dentistry
|April 7, 2007
PubMed
Summary

Three Sident silica abrasives show stability and functionality over two years, making them suitable references for International Standards Organization (ISO) toothpaste abrasion testing alongside calcium pyrophosphate.

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Area of Science:

  • Materials Science
  • Dental Materials Science
  • Analytical Chemistry

Background:

  • Standardized testing of dentifrice abrasives is crucial for product quality and safety.
  • The International Standards Organization (ISO) abrasion reference, calcium pyrophosphate, requires reliable abrasive materials for consistent testing.
  • Evaluating the long-term stability and functionality of potential reference abrasives under various conditions is essential.

Purpose of the Study:

  • To assess the functionality, stability, and suitability of three Sident silica abrasives.
  • To determine if these silica abrasives can serve as references for ISO abrasion and dentifrice assessment methods.
  • To compare the performance of Sident silica abrasives with the current ISO abrasion reference, calcium pyrophosphate.

Main Methods:

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  • Utilized a collaborative study involving multiple laboratories.
  • Employed recognized abrasion and cleaning power methods, including the Radioactive Dentin Method, Profilometry, and Copper Gravimetric.
  • Characterized abrasive powders using ISO and other physicochemical methods.

Main Results:

  • Physicochemical characteristics of the three Sident silica abrasive materials were measured.
  • No changes in functionality were observed over a two-year test period under both ISO and tropical storage conditions.
  • The silica abrasives maintained consistent performance when tested with calcium pyrophosphate.

Conclusions:

  • The three Sident silica abrasives demonstrated excellent stability and consistent functionality.
  • These silica abrasives are suitable for consideration as references in conjunction with calcium pyrophosphate.
  • The findings support the use of Sident silica abrasives in the ISO 11609 Toothpaste Specification.