The effect of laser-activated bleaching with 445 nm and 915 nm diode lasers on enamel micro-hardness; an in vitro study

Saberi, Sogol; Rouzsaz, Mahboubeh; Shafie, F.; Einizadeh, Sadra; Kharazifard, Mohammad Javad; Shahabi, Sima

doi:10.1016/j.pdpdt.2020.101952

Cited by 16 publications

(16 citation statements)

References 31 publications

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“…With the development of lasers and other light sources used to activate bleaching agents 19 , the adverse effects of these sources on tooth hardness have not been reported. There are doubts about the role of these sources in increasing efficiency without damaging the structure of the tooth 20,21 .…”

Section: Discussionmentioning

confidence: 99%

Effect of conventional and power office bleaching with diode laser and led light on enamel microhardness

et al. 2022

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Aim: The present study aimed to asses enamel microhardness after office bleaching with diode laser and LED light compared to the conventional bleaching procedure. Methods: Thirty-nine human premolar teeth were collected and randomly divided into three groups regarding of the bleaching technique. Group 1: Snow O bleaching gel with LED light-curing unit; Group 2: Snow L bleaching gel with diode laser irradiation; and Group 3: Opalescence Boost bleaching gel with no light source in group 3. Enamel surface changes were evaluated in one tooth in each study group and one intact tooth as a reference under a scanning electron microscope (SEM). In the remaining samples (n=12), enamel microhardness was determined by Vickers microhardness test before and after bleaching. Data were analyzed with repeated-measures ANOVA to compare microhardness changes, followed by post hoc Tukey tests at the 0.05 significance level. Results: Enamel microhardness decreased in all the groups after bleaching, with the maximum decrease in microhardness in the Snow O bleaching group with LED light, which was significantly higher than the other groups (P=0.002). The two other groups did not exhibit any significant difference in microhardness decrease (P>0.05). Conclusion: Based on the limitations of this study, it can be concluded power bleaching with 980nm diode laser was less time-consuming compare to conventional bleaching procedure and yielded better outcomes in terms of enamel surface microhardness compared to the use of an LED light-curing unit.

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Section: Discussionmentioning

confidence: 99%

Effect of conventional and power office bleaching with diode laser and led light on enamel microhardness

et al. 2022

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“…This consideration, especially in laser-activated bleaching, raises concerns when choosing the right protocol based on the tooth situation. The diode laser at the wavelength of 445 nm has been recently introduced and has shown acceptable results in dentistry [31]. Diode lasers in the range of 400-480 nm are in the blue region, which can be absorbed better by the pigments, and they have a shorter wavelength that makes them penetrate lower to the tissue compared to the higher wavelengths [32].…”

Section: Discussionmentioning

confidence: 99%

“…The properties mentioned above correlated with the results in which irradiation at 445 nm resulted in lower temperature elevation in comparison with 970 nm. Previous studies showed that bleaching with the diode laser at 445 nm also has a less harmful effect on the tooth surface in terms of microhardness, which makes this laser safer and more reliable [31].…”

Section: Discussionmentioning

confidence: 99%

The effect of laser-activated bleaching with 445 nm and 970 nm diode lasers on pulp chamber temperature rise: an in vitro study

Saberi¹,

Shahabi²,

Tohidkhah³

et al. 2021

Laser Phys.

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The aim of this study was to determine the pulp chamber temperature changes during bleaching procedures with irradiation from 445 nm and 970 nm diode lasers at different powers. A total of 120 human maxillary central incisors were used for this study. Diode lasers at two different wavelengths were irradiated in this evaluation: 970 nm at 1.5 W of power, 970 nm at 2 W, 445 nm at 1 W and 445 nm at 1.5 W. A thermometer was inserted into the pulp chamber and the temperature increase after bleaching was recorded. The results indicated that there was not a significant difference between the groups at the same wavelengths (P > 0.05). However, there was a significant difference between groups at different wavelengths (P < 0.05). The highest recorded pulp temperature increase was for the 970 nm diode laser with 2 W of power (2.0 ± 0.5), and the lowest pulp temperature rise was 0.1 ± 0.2 for the 445 nm diode laser with 1 W of power. According to the results of this study it can be concluded that the temperature elevation after bleaching with the diode laser at the wavelengths 970 nm and 445 nm is in the safe range, and both wavelengths with the parameters applied in this study can be used as prudent in-office bleaching techniques.

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“…o una combinación de estos [3]. Recientemente, se ha utilizado un método rápido y conveniente para acelerar la liberación de radicales libres dentro del gel aclarador y minimizar la sensibilidad posterior al tratamiento, microdureza del esmalte y la irritación gingival a través del uso del láser [4,5].…”

Section: Introductionunclassified

Aclaramiento dental con láser de diodo de 940 nm: Presentación de serie de casos

García

Román

Hoyos-Hoyos

2023

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La era de la odontología estética ha condicionado a mejorar la apariencia de la sonrisa a través de técnicas como el aclaramiento dental con métodos innovadores para minimizar la sensibilidad dental, microdureza del esmalte y la irritación gingival como es el uso de láser de diodo. El propósito de este trabajo es describir el abordaje terapéutico de aclaramiento dental con láser de diodo de 940 nm. A consulta odontológica se presentan diversos casos de pacientes adultos de ambos sexos, que asisten por presentar insatisfacción en el color de los dientes, se realiza examen cínico, toma de registro de color mediante la escala Vita Lumin® antes y después del procedimiento, aplicación de un protocolo de aclaramiento dental y activación con láser de diodo de 940 nm a diferentes potencias y en dos sesiones en el mismo día, encontrando como resultados cambios de color y ausencia de sensibilidad dental posterior al tratamiento realizado.

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The effect of laser-activated bleaching with 445 nm and 915 nm diode lasers on enamel micro-hardness; an in vitro study

Cited by 16 publications

References 31 publications

Effect of conventional and power office bleaching with diode laser and led light on enamel microhardness

Effect of conventional and power office bleaching with diode laser and led light on enamel microhardness

The effect of laser-activated bleaching with 445 nm and 970 nm diode lasers on pulp chamber temperature rise: an in vitro study

Aclaramiento dental con láser de diodo de 940 nm: Presentación de serie de casos

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