IADR Abstract Archives
Clinical Comparison of LED- and Diode Laser-activated Bleaching Over 9-months
Objectives: To clinically compare the effects of LED- or Diode laser-activated bleaching on color change, tooth-sensitivity, gingival-irritation and temperature variation over 9-months.
Methods: Thirty-five patients with tooth color A2 or higher were included in the study. In a split-mouth design, using a 35%HP bleaching agent (Whiteness HP); one side of each mouth was randomly activated by a diode laser(Epic X) and the other side by an LED(Radii Plus) light-source. During bleaching, the temperature variations were recorded using a thermocouple from the buccal surface of canine teeth. Color change (ΔSGU, ΔE) was evaluated by subjective(Vita classic/bleachedguide) and objective methods(spectrophotometry) before treatment and immediately, 48h, 1 week, 1, 6, 9 months after. Tooth-sensitivity and gingival- irritation were assessed by visual analog scale(VAS) and Gingival Index. Color change data was subjected to analysis of variance in repeated measure. Multiple comparisons were done by Bonferroni test. Wilcoxon test was used to compare two light-sources in each recall. Tooth-sensitivity was tested using Friedman test. Temperature variation was evaluated by t-test(p<0.05).
Results: Both bleaching systems caused an improvement in tooth color change and no difference was found among the groups in subjective color evaluation (p>0.05). In objective color evaluation, no difference was detected between Diode laser and LED light in all time periods (p>0.05), except for 6-month recall (p<0.05). Higher ΔE values were obtained with laser(p<0.05). The temperature difference and maximum temperature recorded with laser was found to be significantly higher than LED (p<0.05). When the mean temperatures were compared, significantly higher values were observed with LED light-source. There was no difference in tooth-sensitivity and gingival-irritation at any time (p>0.05).
Conclusions: Both LED- and Diode laser-activated bleaching showed similar clinical effectiveness in terms of subjective color change, tooth-sensitivity and gingival-irritation. While the temperature difference and maximum temperature values were higher with Diode laser, the mean temperature was higher with LED.
Methods: Thirty-five patients with tooth color A2 or higher were included in the study. In a split-mouth design, using a 35%HP bleaching agent (Whiteness HP); one side of each mouth was randomly activated by a diode laser(Epic X) and the other side by an LED(Radii Plus) light-source. During bleaching, the temperature variations were recorded using a thermocouple from the buccal surface of canine teeth. Color change (ΔSGU, ΔE) was evaluated by subjective(Vita classic/bleachedguide) and objective methods(spectrophotometry) before treatment and immediately, 48h, 1 week, 1, 6, 9 months after. Tooth-sensitivity and gingival- irritation were assessed by visual analog scale(VAS) and Gingival Index. Color change data was subjected to analysis of variance in repeated measure. Multiple comparisons were done by Bonferroni test. Wilcoxon test was used to compare two light-sources in each recall. Tooth-sensitivity was tested using Friedman test. Temperature variation was evaluated by t-test(p<0.05).
Results: Both bleaching systems caused an improvement in tooth color change and no difference was found among the groups in subjective color evaluation (p>0.05). In objective color evaluation, no difference was detected between Diode laser and LED light in all time periods (p>0.05), except for 6-month recall (p<0.05). Higher ΔE values were obtained with laser(p<0.05). The temperature difference and maximum temperature recorded with laser was found to be significantly higher than LED (p<0.05). When the mean temperatures were compared, significantly higher values were observed with LED light-source. There was no difference in tooth-sensitivity and gingival-irritation at any time (p>0.05).
Conclusions: Both LED- and Diode laser-activated bleaching showed similar clinical effectiveness in terms of subjective color change, tooth-sensitivity and gingival-irritation. While the temperature difference and maximum temperature values were higher with Diode laser, the mean temperature was higher with LED.
