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Color and surface temperature variation during bleaching in human devitalized primary teeth: an in vitro study
Isa T Gontijo1, Ricardo S Navarro, Ana Lídia Ciamponi
1Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of São Paulo, São Paulo, Brazil.
Journal of Dentistry for Children (Chicago, Ill.)
|December 2, 2008
Summary
This study assessed two dental bleaching techniques for primary teeth. Both diode laser and halogen lamp effectively whitened teeth, but the diode laser generated less heat, making it a potentially safer option.
Area of Science:
- Dentistry
- Biomaterials
Background:
- Primary teeth discoloration can impact aesthetics and child psychology.
- Effective and safe whitening methods for primary teeth are crucial.
Purpose of the Study:
- To compare the efficacy and safety of diode laser (DL) versus halogen lamp (HL) in vitro for bleaching discolored primary teeth.
- To evaluate color change and surface temperature variation during dental bleaching using different catalytic sources.
Main Methods:
- Twenty-one human deciduous incisors were artificially stained with blood.
- Teeth were divided into two groups: diode laser activation and halogen lamp activation.
- Color change was measured using spectrophotometry and VITA scale; temperature increase was recorded with a thermographic camera.
Main Results:
- Both diode laser and halogen lamp effectively whitened the primary teeth.
- No significant difference in color change was observed between the two groups.
- A statistically significant difference in temperature variation was found, with the diode laser causing a lower temperature increase.
Conclusions:
- Both diode laser and halogen lamp are viable catalytic sources for in vitro dental bleaching of primary teeth.
- Diode laser activation presents a potentially safer alternative due to lower heat generation compared to halogen lamp activation.
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