IADR Abstract Archives
Color Stability of Intracoronary Bleaching. One Year of Follow-Up
Objectives: The aim was evaluate visually the estability of the color change in non-vital teeth submitted an intracameral bleaching witth 35% hydrogen peroxide and 37% carbamide peroxide, after 1, 6 and 12 months post-treatment.
Methods: This Randomized Clinical Trial was performed in 46 non-vital teeth submitted a intracameral bleaching with 4 sessions of Walking Bleach technique. Were randomly divided in two groups according to the bleaching agent: G1= 35% hydrogen peroxide (n=23) and G2= 37% carbamide peroxide (n=23). Two calibrated and independent examiners took the color with the Vita-Bleachguide before to treatment (baseline), immediately after each whitening session, one week, one month and three months after bleaching. Color evaluation was in the middle third of the tooth in the vestibular surface of the tooth bleaching according to the recommendations of the ADA. Color changes were recorded as the difference between baseline and different evaluation times, expressed in the number of color guide units (ΔSGU). The statistical analyses were performed using the Mann-Whitney and the Wilcoxon test.
Results: The ΔSGU one month after bleaching G1= 5(0:9) G2= 4(2:7), six months after bleaching G1= 4,5(0:8) G2= 4(0:7) and twelve months after bleaching G1= 4(0:7) G2= 4(0:7). There were no significant differences (p>0.05) between these two groups at the one-year follow-up with Mann-Whitney test. Statistically significant difference (p<0.05) was noted at the one-month time point between group with Wilcoxon test.
Conclusions: The walking bleaching showed minimal color regression in nonvital teeth in one year after treatment.
Methods: This Randomized Clinical Trial was performed in 46 non-vital teeth submitted a intracameral bleaching with 4 sessions of Walking Bleach technique. Were randomly divided in two groups according to the bleaching agent: G1= 35% hydrogen peroxide (n=23) and G2= 37% carbamide peroxide (n=23). Two calibrated and independent examiners took the color with the Vita-Bleachguide before to treatment (baseline), immediately after each whitening session, one week, one month and three months after bleaching. Color evaluation was in the middle third of the tooth in the vestibular surface of the tooth bleaching according to the recommendations of the ADA. Color changes were recorded as the difference between baseline and different evaluation times, expressed in the number of color guide units (ΔSGU). The statistical analyses were performed using the Mann-Whitney and the Wilcoxon test.
Results: The ΔSGU one month after bleaching G1= 5(0:9) G2= 4(2:7), six months after bleaching G1= 4,5(0:8) G2= 4(0:7) and twelve months after bleaching G1= 4(0:7) G2= 4(0:7). There were no significant differences (p>0.05) between these two groups at the one-year follow-up with Mann-Whitney test. Statistically significant difference (p<0.05) was noted at the one-month time point between group with Wilcoxon test.
Conclusions: The walking bleaching showed minimal color regression in nonvital teeth in one year after treatment.