Evaluation of the Diode laser (810nm, 980 nm) on color change of teeth after external bleaching

Abstract

Subject and aim:The aim of this study was to evaluate the efficiency of diode laser-activated bleaching systems for color change of teeth. Materials& Methods: 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 white*20-Biolase) with a 810 nm diode laser; Group 4 received bleaching (laser white*20-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 CIEL*a*b* system were analyzed statistically by the one-way ANOVA and Tukey's HSD test. Results: All the bleaching techniques resulted in shade change. According to DE values, all techniques were effective to bleach the teeth (DE ≥ 3). Statistically significant differences were detected among bleaching protocols (p=0.06). Regarding shade change values expressed asDL*, Da*, Db*, DE*, laser bleached groups were no statistically different with each other (p>0.05). Conclusion: Bleaching with different wavelengths of diode laser resulted in the same results.

Comparison of Tooth Color Change After Bleaching With Conventional and Different Light-Activated Methods

“…They concluded that there was no statistical difference between the 2 laser bleached groups. 15 The aim of this study was to evaluate tooth color changes, following conventional and light-activated in-office bleaching techniques, by different light sources, using a spectrophotoradiometer.…”

Spectrophotometric and Morphologic Comparison of Bleaching with LED and Diode Laser

“…8,18,19 Kiomars ve ark., farklı dalga boylarına sahip diyot lazerin etkinliklerini değerlendirdikleri çalışmalarında, farklı dalga boylarında diyot lazer ile ağartmanın benzer sonuçlar verdiğini belirtmişlerdir. 20 Bu çalışmada, önceki çalışmalardan referans alınarak, ağartma ajanının etkinliğini artırmak için 810 nm dalga boyunda bir diyot lazer 1,5 W güçte 30 sn uygulanmıştır. 20,21 Çeşitli ışık kaynaklarının ve lazerlerin ağartma işlemlerindeki etkinlikleri birçok çalışma ile değerlendirilmiştir.…”

“…20 Bu çalışmada, önceki çalışmalardan referans alınarak, ağartma ajanının etkinliğini artırmak için 810 nm dalga boyunda bir diyot lazer 1,5 W güçte 30 sn uygulanmıştır. 20,21 Çeşitli ışık kaynaklarının ve lazerlerin ağartma işlemlerindeki etkinlikleri birçok çalışma ile değerlendirilmiştir. 18,21,22 Bu in vitro çalışmada, 810 nm diyot lazer ve LED ışık cihazı ile aktive edilen ağartma teknikleri, hiçbir aktivasyon kullanılmadan yapılan ağartma tekniği ile karşılaştırılmıştır.…”

Which Polishing Method Is Effective for Coffee Stains? – An In-Vitro Study of Surface Roughness and Color Change

“…The result of this study indicated that all the tested polishing systems were effective on removing stains from the teeth surfaces as they all showed ΔE values above 3.3, which is accepted as the threshold value for a clinically significant color change (38). There are different methods to detect color; moreover, the most preferred one in clinical practice is visual color selection.…”