Related Experiment Video
Updated: May 16, 2026
07:04
Confocal Time Lapse Imaging as an Efficient Method for the Cytocompatibility Evaluation of Dental Composites
Published on: November 9, 2014
A novel evaluation method for optical integration of class IV composite restorations
D Dietschi1, M Abdelaziz, I Krejci
1Department of Cariology and Endodontics, School of Dentistry, University of Geneva, Switzerland.
Australian Dental Journal
|November 29, 2012
Summary
Spectrophotometry accurately measures the optical integration of composite dental restorations, confirming established color difference thresholds for optimal, acceptable, and unacceptable visual results in anterior tooth restorations.
Area of Science:
- Dental materials science
- Colorimetry in dentistry
Background:
- Evaluating the optical integration of anterior composite restorations is crucial for aesthetic outcomes.
- Traditional visual assessment methods can be subjective.
Purpose of the Study:
- To compare visual appreciation with spectrophotometry for assessing anterior composite restoration optical integration.
- To validate spectrophotometric color difference (ΔE) ranges for clinical acceptability.
Main Methods:
- Eleven anterior composite restorations in eight patients were evaluated.
- Color integration was assessed using visual observation (USPHS criteria) and spectrophotometric analysis.
- Both methods were compared to determine correlation.
Main Results:
- Optimal visual integration (alpha score) correlated with a mean ΔE of 1.1.
- Clinically unacceptable integration (charlie score) correlated with a mean ΔE of 3.3.
- Suboptimal but acceptable integration (bravo score) showed a mean ΔE of 2. L*, a*, and b* values indicated differences between composite and natural tooth shades.
Conclusions:
- Spectrophotometry provides a reliable method for quantifying color integration in dental restorations.
- The study confirmed published ΔE ranges for optimal, acceptable, and unacceptable color matches.
- This supports the use of spectrophotometry for objective evaluation of aesthetic dental treatments.
