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Evaluating the Effects of Different Polishing Methods on Color Stability of Dental Restorations in Pediatric Dentistry
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Evaluation of Staining-Dependent Colour Changes in Resin Composites Using Principal Component Analysis.

D Manojlovic1, L Lenhardt2, B Milićević2

  • 1University of Belgrade, School of Dental Medicine, Rankeova 4, Belgrade, 11000, Serbia.

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|October 10, 2015
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Summary

Tea, coffee, and red wine significantly stain dental composites, causing noticeable color changes. Coca-Cola showed minimal staining potential in this study on composite color stability.

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Area of Science:

  • Materials Science
  • Dental Biomaterials
  • Colorimetry

Background:

  • Dental composites are susceptible to discoloration from common beverages.
  • Understanding the staining potential of various drinks is crucial for material longevity and aesthetics.

Purpose of the Study:

  • To evaluate the color changes in Gradia Direct™ composite after immersion in common staining agents.
  • To compare the staining efficacy of tea, coffee, red wine, Coca-Cola, and mouthwash.

Main Methods:

  • Immersion of composite samples in various staining solutions (tea, coffee, red wine, Coca-Cola, mouthwash, distilled water).
  • Color change analysis using CIELAB color coordinates.
  • Surface reflection analysis using Principal Component Analysis (PCA) on reflection spectra.

Main Results:

  • Tea, coffee, and red wine demonstrated significant staining potential, with total color changes of 4.31, 6.61, and 6.22, respectively.
  • Stained samples showed reduced reflection in the blue spectral range, indicating a loss of blue shade.
  • Coca-Cola exhibited a minor staining effect on the composite material.

Conclusions:

  • Beverages like tea, coffee, and red wine pose a considerable risk of discoloration to dental composites.
  • PCA and CIELAB analysis are effective methods for quantifying and understanding composite staining.
  • Gradia Direct™ shows susceptibility to staining, particularly from highly pigmented beverages.