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Related Experiment Video

Updated: May 19, 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

Dental light curing and its effects on color perception.

Neil McCusker¹, Clare Bailey, Stephen Robinson

¹Child Dental Health, School of Oral and Dental Science, University of Bristol, United Kingdom.

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics

|August 28, 2012

Summary

Orthodontists show poor knowledge of dental light-curing units and associated hazards. Despite potential risks, the study found no impact on color discrimination abilities.

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Area of Science:

Dental Materials Science
Orthodontic Technology
Ophthalmology

Background:

Light curing is widely adopted in orthodontic bonding due to advancements in light-curing unit (LCU) technology and intensity.
Concerns exist regarding orthodontists' understanding of LCUs, their safety protocols, and potential effects on vision.

Purpose of the Study:

To evaluate orthodontists' knowledge regarding dental light-curing units (LCUs).
To assess orthodontists' awareness of safety aspects associated with LCUs.
To investigate the impact of LCUs on color perception among dental professionals.

Main Methods:

A questionnaire was distributed to 120 orthodontic specialists and trainees to gauge knowledge of LCUs and safety.
The Farnsworth Munsell 100 hue test was administered to 15 orthodontists and 15 non-orthodontists to evaluate color perception.

Main Results:

A high response rate (86.6%) was achieved. Light-emitting diode (LED) LCUs were most common (73.4%).
Significant knowledge gaps were identified: 84% unaware of LCU intensity and 67% unaware of wavelength. Many (76-99%) were unsure or took no precautions for patients with cataracts or on photosensitizing medications.
Color discrimination tests showed no significant differences between orthodontists and controls, or between genders.

Conclusions:

Orthodontists demonstrate inadequate knowledge concerning dental LCUs and their associated hazards.
While long-term risks from LCUs are possible, this study did not detect any adverse effects on participants' color discrimination abilities.