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Effect of Nd:YAG Laser Irradiation to Mental Region for Sensory Nerve Conduction Change  

Jeon, Jae-Woo (Department of Oral Medicine, College of Dentistry, Pusan National University)
Kim, Kyoung-Hee (Department of Oral Medicine, College of Dentistry, Pusan National University)
Ko, Myong-Yun (Department of Oral Medicine, College of Dentistry, Pusan National University)
Ahn, Yong-Woo (Department of Oral Medicine, College of Dentistry, Pusan National University)
Park, Jun-Sang (Department of Oral Medicine, College of Dentistry, Pusan National University)
Publication Information
Journal of Oral Medicine and Pain / v.30, no.4, 2005 , pp. 447-455 More about this Journal
Abstract
The purpose of this study was to examine the effect of Nd:YAG laser irradiation for sensory nerve conduction change. Nd:YAG laser was irradiated to mental region for 5 minutes with the parameters that 10 Hz and 20 Hz of 100 mJ/pulse. Target size of irradiation was 30 mm diameter of circle and target-tip distance was about 10 mm. Therefore, the power density were 212 $mW/cm^2$ and 424 $mW/cm^2$. Sensory nerve conduction was evaluated with $Neurometer^{\circled}$ CPT/C before and after Nd:YAG laser irradiation. As an outcomes, the current perception threshold(CPT) and pain tolerance threshold(PTT) were obtained. We made a comparison of these two values and the results were as follows. 1. There was no significant difference in CPT at 1W, 10 Hz and 2 W, 20 Hz Nd:YAG laser irradiation. 2. There was no significant difference in PTT at 10 Hz, 20 Hz of 100 mJ/pulse Nd:YAG laser. 3. There were no significant differences in CPT and PTT between 1 W, 10 Hz group and 2 W, 20 Hz group. Therefore, We can make a conclusion that Nd:YAG laser irradiation to mental region have no effect on mental nerve conduction in our study model.
Keywords
Nerve conduction change; Low level laser; Nd:YAG; Current perception threshold; Pain tolerance threshold;
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