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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.<BR>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.<BR>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.<BR>The clamp (Ivory #210) was then placed into cervical undercuts on the canine.<BR>The severity of pain was evaluated by Visual Analogue Scale (VAS).<BR>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.<BR>After the irradiation, pulp thermal sensitivity was measured, and also the severity of pain was evaluated by Visual Analogue Scale (VAS) after clamp placement.<BR>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).<BR>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).<BR>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.
- 日本レーザー歯学会の論文