M Sulieman1, M Addy, E MacDonald, J S Rees. 1. Division of Restorative Dentistry, University of Bristol Dental School, Lower Maudlin Street, Bristol BS1 2LY, UK.
Abstract
AIM: This in vitro study examined the effect that various concentration of hydrogen peroxide (5-35%) had on tooth whitening. METHOD: Extracted third molars were sectioned and stained using a standardised tea solution to Vita shade C4. These stained specimens were then bleached with a series of gels containing 5, 10, 15 or 25% w/w hydrogen peroxide. Each specimen was bleached for a number of sessions with one session being defined as 3 x 10 min exposure. RESULTS: The number of applications of the various concentrations of bleaching gel varied from 12 applications for the 5% gel to one application for the 35% gel. Plotting the number of applications against hydrogen peroxide concentration showed an exponential response curve. CONCLUSIONS: The concentration of hydrogen peroxide in a proprietary bleaching gel had a marked effect on the number of applications required to produce an optimal shade outcome.
AIM: This in vitro study examined the effect that various concentration of hydrogen peroxide (5-35%) had on tooth whitening. METHOD: Extracted third molars were sectioned and stained using a standardised tea solution to Vita shade C4. These stained specimens were then bleached with a series of gels containing 5, 10, 15 or 25% w/w hydrogen peroxide. Each specimen was bleached for a number of sessions with one session being defined as 3 x 10 min exposure. RESULTS: The number of applications of the various concentrations of bleaching gel varied from 12 applications for the 5% gel to one application for the 35% gel. Plotting the number of applications against hydrogen peroxide concentration showed an exponential response curve. CONCLUSIONS: The concentration of hydrogen peroxide in a proprietary bleaching gel had a marked effect on the number of applications required to produce an optimal shade outcome.
Authors: Diana Gabriela Soares; Ana Paula Dias Ribeiro; Fernanda da Silveira Vargas; Josimeri Hebling; Carlos Alberto de Souza Costa Journal: Clin Oral Investig Date: 2012-12-06 Impact factor: 3.573