International Poster Journal of Dentistry and Oral Medicine
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Int Poster J Dent Oral Med 18 (2016), OMD/PDA     15. Jan. 2017
Int Poster J Dent Oral Med 18 (2016), OMD/PDA  (15.01.2017)

Supplement, Poster 1090, Language: English


In Vitro Evaluation of the Efficacy of Dental Bleaching
Marques, Maria João / Oliveira, Maria Teresa / Melo, Paulo / Almeida, Carlos
Introduction: Nowadays, tooth whitening is the most conservative and more used option to remove the dental pigmentation.
Objective: To evaluate the color variations (∆E) occurred in two distinct groups submitted to vitro whitening different techniques, and also to evaluate which technique achieves better clinical effectiveness.
Materials and methods: Fifty four bovine teeth extracted (incisors mandibular central), were divided, randomly, into two study groups (N=24, each group). Teeth were pigmented in a coffe, black tea and cola solution. In group 1 dental bleaching was performed with Polanight 16% carbamide peroxide (SDI, Australia). In group 2 we combined Pola Office+ (SDI, Australia), hydrogen peroxide, associated with Polanight 16% carbamide peroxide.
The color measurement was made with Vita Easyshade® spectrophotometer at the initial moment, after pigmentation, treatment finalization and follow-up after a week.
Results: The ∆E, - after pigmentation and final - were statistically significant in both periods. It was not found statistically significant differences at the treatment finalization of treatment between group 1 and 2, however the group 2 presented a slightly higher ∆E.
Conclusion: Both dental whitening treatments proved effective, however when compared, the two techniques didn't present statistically significant differences.

Keywords: Dental bleaching, carbamide peroxide, hydrogen peroxide, vital tooth bleaching, home bleaching

Conference/Exhibition:
25th Annual Meeting of the Portuguese Dental Association
10.-12. November 2016
Exponor, Porto, Portugal