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Related Experiment Video

Updated: May 25, 2026

Evaluating the Effects of Different Polishing Methods on Color Stability of Dental Restorations in Pediatric Dentistry

Evaluating the Effects of Different Polishing Methods on Color Stability of Dental Restorations in Pediatric Dentistry

Published on: June 6, 2025

Opalescence of bleached teeth.

Max Schmeling¹, Hamilton Pires Maia, Luiz Narciso Baratieri

¹Operative Dentistry, School of Dentistry, Federal University of Santa Catarina, Florianopolis, SC, Brazil. maxschmeling@globo.com

Journal of Dentistry

|February 14, 2012

Summary

This summary is machine-generated.

Tooth bleaching significantly reduces enamel opalescence, a measure of light scattering. This effect is linked to changes in the yellow-blue color coordinates after the bleaching procedure.

Related Experiment Videos

Last Updated: May 25, 2026

Evaluating the Effects of Different Polishing Methods on Color Stability of Dental Restorations in Pediatric Dentistry

Evaluating the Effects of Different Polishing Methods on Color Stability of Dental Restorations in Pediatric Dentistry

Published on: June 6, 2025

Area of Science:

Dental Materials Science
Biomaterials
Aesthetic Dentistry

Background:

Opalescence is a critical optical property of dental enamel, influencing its aesthetic appearance.
Tooth bleaching is a common cosmetic procedure, but its effects on enamel's optical properties require thorough investigation.

Purpose of the Study:

To quantitatively assess the impact of tooth bleaching on the opalescence of dental enamel.
To determine if bleaching alters the light scattering characteristics of enamel.

Main Methods:

Colorimetric analysis using CIELab color coordinates was performed on 38 enamel specimens.
Opalescence Parameter (OP) was calculated by comparing reflected and transmitted color data (Δb* and Δa*).
Measurements were taken before and after the bleaching procedure.

Main Results:

The mean Opalescence Parameter (OP) decreased from 18.9 (±1.6) before bleaching to 16.1 (±1.0) after bleaching.
A statistically significant reduction in OP was observed post-bleaching (p>0.001).

Conclusions:

Tooth bleaching demonstrably decreases the opalescence of enamel.
The observed decrease in opalescence is significantly correlated with alterations in the yellow-blue color coordinate (b*) in the transmitted light spectrum.