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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

Tooth shade selection using a colorimetric instrument compared with that using a conventional shade guide.

Dusan Kuzmanović¹, Karl M Lyons

¹Department of Oral Diagnostic and Surgical Sciences, School of Dentistry, University of Otago, Dunedin, New Zealand. dusan.kuzmanovic@dent.otago.ac.nz

The New Zealand Dental Journal

|December 17, 2009

Summary

This study found visual and instrumental colorimetry have similar accuracy for dental shade selection. However, there was poor agreement between the two methods, indicating a need for further research.

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Area of Science:

Dental materials science
Color science
Clinical dentistry

Background:

Accurate dental shade selection is crucial for aesthetic restorations.
Conventional visual shade matching relies on subjective assessment.
Instrumental colorimetry offers objective tooth color measurement.

Purpose of the Study:

To compare the color matching ability of instrumental colorimetry with conventional visual techniques.
To evaluate the reliability and agreement between visual and instrumental shade selection in dentistry.

Main Methods:

Three dentists used a Vita Classical shade guide for visual shade selection.
A Shade Vision colorimeter was used for instrumental tooth color measurement.
Intraclass correlation coefficient (ICC) analyzed examiner reliability and method agreement.

Main Results:

Good interexaminer reliability was found for the visual Vita Classical shade guide (ICC = 0.62).
Poor agreement was observed between visual and instrumental shade selection techniques (ICC = 0.27).

Conclusions:

No significant difference in accuracy was found between visual and instrumental shade selection.
Discrepancies exist when comparing visual and instrumental methods for the same tooth.
Further research is needed to clarify the clinical relevance and advantage of using colorimeters for dental shade selection.