Abstract
When different lasers were applied to the dentin of immature permanent teeth to block external stimuli during dental restorative treatment, our study, showed that a carbon dioxide laser was found to be the only laser that covered enough conditions to seal the dental tubules. In view of the clinical application of the CO2 laser, this study was carried out based on the irradiation conditions obtained in a previous study. The objective of this study was to investigate changes in the effects of heat produced by laser irradiation on the pulp when changes in the thickness of the dentin is changed. For this purpose, changes in the temperature of the dentin near the pulp were measured. The results were as follows.
1. For both normalpulse and superpulse lasers, the rise in the temperature of the dentin increased when the irradiation time increased, the average output increased, or the thickness of the dentin decreased.
2. The rise in temperature remained lower for the superpulse laser than for the normalpulse laser throughout the irradiation.
3. The rise in temperature became higher as pulse cycles per second became higher for the same irradiation time.
