Evaluation of tooth color change after a bleaching process with different lasers

AbstractThe aim of this in vitro study was to evaluate the efficiency of diode laser-activated bleaching systems for color change of teeth. 75 extracted teeth were studied in five different bleaching protocols. Group 1: diode laser 445  nm, 320 µm fiber, 0.5W, continuous wave mode,dose 53  J/cm2. Group 2: diode laser 970  nm, 320 µm fiber, 1W, continuous wave mode, dose 106.10  J/cm2. Group 3: diode laser 940  nm, bleaching handpiece, 7W, continuous wave mode,dose 105  J/cm2. Group 4: diode laser 940  nm, 300 µm fiber, 2W, continuous wave mode, dose47.16  J/cm2. Group 5: bleaching process without laser activation. In groups 1, 2 and 5, teeth were bleached with Perfect Bleach Office  + and in groups 3 and 4, LaserWhite20 bleaching gel was used. Tooth color was determined immediately after the bleaching process using a spectrophotometer. Color change data on the CIEL * a * b* system was analyzed statistically by the one-way ANOVA and Tukey ’s HSD test. All bleaching procedures resulted in a change of color. All laser groups (∆E  *  ab >  3) have statistically larger ∆E * ab values than the control group ( ∆E * ab = 0.73) (p <  0.05). The diode laser 445 nm has the largest ∆E * ab value ( ∆E * ab = 4.65) and results in a significantly higher color difference than all other groups. In terms of color score difference in VITA Shades, all laser-activated groups lead to a lightening effect while the control group lead...

Source: Odontology - February 17, 2024 Category: Dentistry Source Type: research