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Assessment of the effectiveness of light-emitting diode and diode laser hybrid light sources to intensify dental bleaching treatment.

Abstract：

OBJECTIVE:To evaluate the effectiveness of the color change of hybrid light-emitting diode (LED) and low-intensity infrared diode laser devices for activating dental bleaching and to verify the occurrence of a color regression with time. MATERIAL AND METHODS:A total of 180 specimens obtained from human premolars were immersed in a coffee solution for 15 days for darkening and then divided into eight experimental groups (n = 20 in each) as follows: G1, bleaching without light; G2, bleaching with halogen light; G3, bleaching with a blue LED (1000 mW/470 nm) and a laser device (120 mW/795 nm) simultaneously; G4, bleaching with an LED emitting blue light (1000 mW/470 nm); G5, bleaching with a blue LED (800 mW/470 nm) and a laser device (500 mW/830 nm) simultaneously; G6, bleaching with a blue LED device (800 mW); G7, bleaching with a green LED (600 mW/530 nm) and a laser device (120 mW/795 nm) simultaneously; and G8, bleaching with a green LED (600 mW). Three measurements were performed (at baseline and 14 days and 12 months after bleaching) using a Vita Easyshade spectrophotometer. The data were submitted to two-way ANOVA and a Tukey test. RESULTS:All groups showed significantly higher ΔE values than Group G1, with the exception of Group G8. Variations in the ΔE values at 14 days were significant when compared with those obtained at baseline and after 12 months. CONCLUSIONS:Light activation of the bleaching gel provided faster and more intense bleaching than use of the bleaching gel without light activation. Combinations of low-intensity diode lasers are ineffective as a bleaching gel activator. Color regression was observed after 12 months of storage.

journal_name

Acta Odontol Scand

journal_title

Acta odontologica Scandinavica

authors

Torres CR,Barcellos DC,Batista GR,Borges AB,Cassiano KV,Pucci CR

doi

10.3109/00016357.2010.549503

subject

Has Abstract

pub_date

2011-05-01 00:00:00

pages

176-81

issue

3

eissn

0001-6357

issn

1502-3850

journal_volume

69

pub_type

杂志文章

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