Effect of conventional and power office bleaching with diode laser and led light on enamel microhardness
Braz. j. oral sci
;
21: e226630, jan.-dez. 2022. ilus
Article
in English
| LILACS, BBO
| ID: biblio-1393209
ABSTRACT
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
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Tooth Bleaching
/
Dental Enamel
/
Lasers, Semiconductor
/
Curing Lights, Dental
/
Hardness
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2022
Type:
Article
Affiliation country:
Iran
Institution/Affiliation country:
Tehran University of Medical Sciences/IR
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