| Autor: |
CIBIRKA, ROMAN M., MYERS, MICHAEL, DOWNEY, MARY C., NELSON, STEVEN K., BROWNING, WILLIAM D., HAWKINS, ISAAC K., DICKINSON, GENE L. |
| Zdroj: |
Journal of Esthetic & Restorative Dentistry; Nov1999, Vol. 11 Issue 6, p325-331, 7p |
| Abstrakt: |
Purpose: Prescribed, patient-applied tooth lightening agents, or nightguard vital bleaching, typically utilizes a 10% carbamide peroxide agent applied during nocturnal hours. The purpose of this randomized double-blind study was to compare the amount of tooth color change in two groups of subjects using dentist-supervised, patient-applied 10% carbamide peroxide gel. Materials and Methods: One group used Opalescence® (Ultradent Products Inc., South Jordan, Utah) and the other Nite White Excel® (Discus Dental, Inc., Los Angeles, California). Evaluation of tooth color for the six maxillary anterior teeth was done using a Vita shade guide at baseline, 1, 2, and 4 weeks. Subjects were instructed to apply the gel nocturnally using a custom-made soft tray 8 hours per day for 2 weeks. The 16 tabs of the shade guide were ranked according to value from darkest to lightest. The number (1-16) that correlated to the shade tab selected as the match for each tooth was the outcome variable. A Kruskal-Wallis one way analysis of variance on ranks was used. Results: The test revealed no statistically significant difference between Opalescence® and NiteWhite® Excel for lightening the teeth ( p= .807). The color change was still significant after 2 weeks without further bleaching activity. The baseline evaluation of the maxillary incisors and canines for all subjects, regardless of group, demonstrated a significant shade difference, with the canines being darker. This difference was not seen after 2 weeks of active bleaching or at the 4-week evaluation. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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