Dental bleaching efficacy with diode laser and LED irradiation: An in vitro study

Wetter, Niklaus Ursus; Barroso, Márcia C S; Pelino, José Eduardo Pelizon

doi:10.1002/lsm.20103

Cited by 117 publications

(101 citation statements)

References 17 publications

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“…Each parameter used in this investigation was employed according to the best previous results. In a study by Wetter et al 23 in 2004, the bleaching efficacy of LED was compared with diode laser while using Xtra Boost. In all parameters, the laser group outperformed the other modalities used in comparison except for luminosity, which concurs with the results of our investigation.…”

Section: Discussionmentioning

confidence: 99%

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

et al. 2017

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Introduction:The demand for esthetic dental treatments is increasing in recent years mainly due to improved oral hygiene and better maintenance of oral health and teeth in older individuals. Bleaching of discolored anterior teeth is the most popular among esthetic dental treatments. Even individuals with sound teeth and adequate esthetics seek to have whiter teeth in the anterior region. The aim of this study was to evaluate tooth color changes following conventional in-office bleaching techniques compared to light-activated methods using different light sources. Methods: Seventy sound anterior teeth (devoided of caries and/or fracture), extracted for periodontal and orthodontic reasons were selected and allocated to 7 groups: (A) control, (B) conventional bleaching (C) LED-activated bleaching, (D) KTP laser-activated bleaching, (E) diode laseractivated bleaching, (F) Nd:YAG laser-activated bleaching and (G) CO2 laser-activated bleaching. Colorimetric evaluation was carried out before and after treatment using a spectrophotoradiometer. Data were analyzed by one-and two-way analysis of variance (ANOVA) as well as multiple comparison methods. Results:The results showed that all bleaching procedures were effective in reducing the yellowness index. However, the KTP laser-activated bleaching was significantly more effective than the other techniques in 95% confidence level. It was also seen that CO2 laser activated method has outperformed groups E, F and G and the conventional bleaching without light activation was not effective at all and represented similar results with the control group. Furthermore, the groups E and G had almost the same results in decreasing the yellowness index. Conclusion:The results showed that all bleaching techniques were effective however, the KTP laser-activated bleaching was significantly more efficient, closely followed by the CO2 laseractivated bleaching technique.

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Section: Discussionmentioning

confidence: 99%

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

et al. 2017

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“…The mechanisms of these reactions are varied and dependent on the substrate, the reaction environment, and the catalysts 18) .…”

Section: Discussionmentioning

confidence: 99%

“…In general, the bleaching mechanism by H2O2 is not well understood as it can form a number of different active oxygen species depending on the reaction conditions, including temperature, pH, light, and the presence of transition metals 18) . Under alkaline conditions, hydrogen peroxide bleaching generally proceeds via the perhydroxyl anion (HO 2− ).…”

Section: Discussionmentioning

confidence: 99%

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Effects of light sources and visible light-activated titanium dioxide photocatalyst on bleaching

et al. 2009

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The objective of this study was to evaluate, using methylene blue (MB), the effects of various light sources on the bleaching action of hydrogen peroxide (H2O2) with two titanium dioxide (TiO2) photocatalysts -an ultraviolet light-activated TiO2 photocatalyst (UV TiO2) versus a visible light-activated TiO2 photocatalyst (VL-TiO2). Five experimental solutions (VL-TiO2+H2O2, UV-TiO2+H2O2, H2O2, VL-TiO2, UV-TiO2) were prepared by mixing varying concentrations of H2O2 and/or TiO2 photocatalyst with MB solution. For H2O2-containing solutions (VL-TiO2+H2O2, UV-TiO2+H2O2, and H2O2), the concentration of H2O2 was adjusted to 3.5%. For the four different light sources, low-and high-intensity halogen lamps and blue LED LCUs were used. All the experimental solutions were irradiated by each of the light sources for 7 minutes, and the absorbance at 660 nm was measured every 30 seconds to determine the concentration of MB as an indicator of the bleaching effect. On the interaction between the effects of light source and bleaching treatment, the high-intensity halogen with VL-TiO2+H2O2 caused the most significant reduction in MB concentration. On the effect of light sources, the halogen lamps resulted in a greater bleaching effect than the blue LED LCUs.

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“…8,24 Also higher temperature elevations in the pulp have been reported with diode lasers compared to other lasers or lamps. [25][26][27][28] The biggest increase of intrapulpal temperature during bleaching was observed with the use of diode laser (2-14 ° C), exceeding an acceptable limit. The KTP laser produced no lesions in the pulp tissue.…”

Section: Discussionmentioning

confidence: 99%

Potassium-titanyl-phosphate (KTP) Laser and Dental Bleaching. Literature review.

2013

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Abstract:Objective: To determinate if dental bleaching with KTP laser is a safe, effective and efficient technique. The use of KTP laser for dental bleaching was only investigated in combination with a high concentration of hydrogen peroxide (35%). The recommended protocol was: for the use of KTP laser at 3W power and an irradiation time of ten seconds, three to four cycles are needed. For a power of 1W and an irradiation time of thirty seconds the number of cycles is three with a maximum of four. Under these conditions KTP laser bleaching was considered not to alter surface morphology, to have no influence on enamel microhardness, to maintain the pulp temperature within normal values, to obtain lighter tooth color which can be maintained for months (no long term studies were conducted). Because the bleaching effect was obtained in a short period of time and maintained for months, KTP laser bleaching was considered an effective and efficient technique. Conclusion: KTP-assisted dental bleaching is a safe, effective and efficient technique when combined with high concentration of hydrogen peroxide.

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Dental bleaching efficacy with diode laser and LED irradiation: An in vitro study

Abstract: Best overall results are obtained with the Whiteness HP and Laser association.

Cited by 117 publications

References 17 publications

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

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

Effects of light sources and visible light-activated titanium dioxide photocatalyst on bleaching

Potassium-titanyl-phosphate (KTP) Laser and Dental Bleaching. Literature review.

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