Ｎｄ：ＹＡＧレーザー照射によるクランプ装着時のとう痛緩和効果

Abstract

This study evaluated the pain relief effects at clamp placement after Nd: YAG laser irradiation. Eleven adult volunteers (6 males and 5 females, mean age of 24.5 years), who had consented to this study, participated in the study.Both sides of healthy mandible canines were selected as experimental sites: the right side for irradiation, and the left side as the control without irradiation.On the control side, pulp thermal sensitivity was measured by an electrothermal stimulator, the probe tip of which could be heated from 29°C to 65°C.The clamp (Ivory #210) was then placed into cervical undercuts on the canine.The severity of pain was evaluated by Visual Analogue Scale (VAS).On the irradiation side, the pulsed Nd: YAG laser was applied to the cervical area of the canine coated with Chinese ink, twice for 30 seconds each, using 100 mJ pulses at 15 pps.After the irradiation, pulp thermal sensitivity was measured, and also the severity of pain was evaluated by Visual Analogue Scale (VAS) after clamp placement.There was a statistically significant difference in the pain relief effects on pulp thermal sensitivity between the irradiation side and the control side (p<0.05: Piared t-test).There was also a significant difference in the sensitivity of pain by VAS at clamp placement between them (p<0.05: Wilcoxon signed-ranks test).These results suggest that Nd: YAG laser irradiation before rubber-dam placement is very useful for pain relief. Nd: YAG laser irradiation appears effective for analgesia, and might be useful for clinical application.