Kiomars Nazanin, Azarpour Pouneh, Mirzaei Mansooreh, Hashemi Kamangar Sedighe Sadat, Kharazifard Mohammad Javad, Chiniforush Nasim
Department of Operative Dentistry, Dental faculty, Tehran University of Medical Science, International campus, Tehran, Iran.
Tehran University of Medical Sciences, International campus, Tehran, Iran.
Laser Ther. 2016 Dec 30;25(4):267-272. doi: 10.5978/islsm.16-OR-21.
The aim of this study was to evaluate the efficiency of diode laser-activated bleaching systems for color change of teeth. 40 premolars with intact enamel surfaces were selected for five external bleaching protocols (n=8). Two different wavelengths of diode laser (810 and 980 nm) with two different hydrogen peroxide concentrations (30% and 46%) were selected for laser bleaching. Group 1 received bleaching (Heydent- Germany) with a 810 nm diode laser; Group 2 received bleaching (Heydent- Germany) with a 980 nm diode laser; Group 3 received bleaching (laser white20- Biolase) with a 810 nm diode laser; Group 4 received bleaching (laser white20- Biolase) with a 980 nm diode laser, with an output power of 1.5 W, in continuous wave (cw) mode for each irradiation. Group 5 as control group received 40% hydrogen peroxide (Opalescence Boost, Ultradent-USA) with no light activation. The color of teeth was scored at baseline and 1 week after bleaching with spectrophotometer. Color change data on the CIELab* system were analyzed statistically by the one-way ANOVA and Tukey's HSD test. All the bleaching techniques resulted in shade change. According to ΔE values, all techniques were effective to bleach the teeth (ΔE ≥ 3). Statistically significant differences were detected among bleaching protocols (p=0.06). Regarding shade change values expressed as ΔL*, Δa*, Δb*, ΔE*, laser bleached groups were no statistically different with each other (p>0.05). Bleaching with different wavelengths of diode laser resulted in the same results.
本研究的目的是评估二极管激光激活漂白系统对牙齿颜色变化的效果。选择40颗釉质表面完整的前磨牙进行五种外部漂白方案（n = 8）。选择两种不同波长的二极管激光（810和980 nm）以及两种不同浓度的过氧化氢（30%和46%）进行激光漂白。第1组接受810 nm二极管激光漂白（德国海德特）；第2组接受980 nm二极管激光漂白（德国海德特）；第3组接受810 nm二极管激光漂白（激光美白20 - 美国Biolase）；第4组接受980 nm二极管激光漂白（激光美白20 - 美国Biolase），每次照射时连续波（cw）模式下输出功率为1.5 W。第5组作为对照组接受40%过氧化氢（美国Ultradent公司的Opalescence Boost）且无光激活。在基线时以及漂白1周后用分光光度计对牙齿颜色进行评分。采用单因素方差分析和Tukey's HSD检验对CIELab系统的颜色变化数据进行统计学分析。所有漂白技术均导致了色度变化。根据ΔE值，所有技术对牙齿漂白均有效（ΔE≥3）。在漂白方案之间检测到统计学显著差异（p = 0.06）。关于以ΔL、Δa* /、Δb*、ΔE*表示的色度变化值，激光漂白组之间在统计学上无差异（p>0.05）。用不同波长的二极管激光漂白得到了相同的结果。
