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Related Experiment Videos

A Comparative Study of Laboratory Dentifrice Abrasion Measuring Methods.

Michael Prencipe1, Mark Vandeven1, Brian N Feldman2

  • 1Colgate-Palmolive Company Piscataway, NJ, USA.

The Journal of Clinical Dentistry
|April 10, 2017
PubMed
Summary

The profilometry equivalent (RDA-PE) method for measuring toothpaste dentin abrasivity may not be equivalent to the traditional radiotracer relative dentin abrasion (RDA) method, especially for highly abrasive whitening toothpastes.

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Area of Science:

  • Dental Materials Science
  • Tribology
  • Oral Health Research

Background:

  • Toothpaste abrasivity is a critical factor in dentin wear, influencing oral health outcomes.
  • The traditional radiotracer relative dentin abrasion (RDA) method is widely used to assess toothpaste abrasivity.
  • A newer profilometry-based method, RDA-PE (Profilometry Equivalent), has been proposed as an alternative to the radiotracer RDA procedure.

Purpose of the Study:

  • To compare the efficacy of the traditional radiotracer RDA method and the profilometry-based RDA-PE method in measuring dentin abrasivity.
  • To assess the consistency and discriminatory power of both methods for commercially available whitening toothpastes.
  • To evaluate if the RDA-PE method provides equivalent results to the radiotracer RDA method, particularly in higher abrasivity ranges.
Keywords:
profilometryradiotracerrelative dentin abrasivitywhitening dentifrice

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Main Methods:

  • Laboratory assessment of three silica-based dentifrices (regular, two whitening) with varying abrasivity levels.
  • Dentin specimens were tested using both the standard radiotracer RDA method and the RDA-PE method, following ISO 11609 requirements.
  • Statistical analysis, including Student-Newman-Keuls (SNK), was employed to compare the results from both methods.

Main Results:

  • Both the radiotracer RDA and RDA-PE methods provided numerical values allowing for the ranking of the tested dentifrices.
  • No direct correlation was found between the RDA values obtained by profilometry and the conventional radiotracer method.
  • A significant discrepancy was observed where one dentifrice ranked as most abrasive by radiotracer RDA was rated moderately abrasive by RDA-PE, with loss of statistical discrimination.

Conclusions:

  • The RDA-PE method demonstrated a lack of agreement with the traditional radiotracer RDA method for the tested products.
  • The profilometry-based RDA-PE method may not be equivalent to the traditional radiotracer RDA method, particularly in assessing higher levels of dentin abrasivity.
  • Further research is needed to validate the RDA-PE method's reliability and equivalence across a broader range of toothpaste formulations and abrasivity levels.