Temperature Changes Accompanying Near Infrared Diode Laser Endodontic Treatment of Wet Canals

被引:36
作者
Hmud, Raghad [1 ]
Kahler, William A. [1 ]
Walsh, Laurence J. [1 ]
机构
[1] Univ Queensland, Sch Dent, Brisbane, Qld 4000, Australia
基金
英国医学研究理事会;
关键词
Diode; endodontic treatment lasers; temperature; thermocouples; ROOT SURFACE; WALL DENTIN; SMEAR LAYER; IN-VITRO; IRRADIATION; IRRIGANTS; TEETH; VIVO; YAG;
D O I
10.1016/j.joen.2010.01.007
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
Introduction: Diode laser endodontic treatments such as disinfection or the generation of cavitations should not cause deleterious thermal changes in radicular dentin. Methods: This study assessed thermal changes in the root canal and on the root surface when using 940 and 980 nm lasers at settings of 4 W/10 Hz and 2.5 W/25 Hz, respectively, delivered into 2000-mu m fibers to generate cavitations in water. The root surface temperature in the apical third was recorded, as was the water temperature in coronal, middle, and apical third regions, by using thermocouples placed inside the canal. Lasing was undertaken with either rest periods or rinsing between 5-second laser exposures. Results: Both diode lasers induced only modest temperature changes on the external root surface at the settings used. Even though the temperature of the water within the canal increased during lasing by as much as 30 degrees C, the external root surface temperature increased by only a maximum of 4 degrees C. Irrigation between laser exposures was highly effective in minimizing thermal changes within the root canal and on the root surface. Conclusions: Diode laser parameters that induce cavitation do not result in adverse thermal changes in radicular dentin. (J Endod 2010;36:908-911)
引用
收藏
页码:908 / 911
页数:4
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