Table of Contents
International Scholarly Research Notices
Volume 2014 (2014), Article ID 416572, 3 pages
Research Article

Clinical Evaluation of Etched Enamel Discoloration following Immediate and Delayed Exposure to Colored Agents

1Dental Research Center, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad 9138813944, Iran
2Faculty of Dentistry, Mashhad University of Medical Sciences, MashhadMashhad 9138813944, Iran
3School of Dentistry, Vakilabad Boulevard, Mashhad 9177948959, Iran

Received 11 April 2014; Accepted 30 May 2014; Published 23 July 2014

Academic Editor: Wen-Cheng Chen

Copyright © 2014 Neda Eslami et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Introduction. The aim was to evaluate etched enamel discoloration following immediate and delayed exposure to colored agents. Method & Material. 64 premolars were divided into four groups. Buccal surface of the teeth was divided into two halves and baseline color values were measured. One half was covered and the other half was etched and dried. In first and second groups, the patients did not eat any colored agents for the next 24 hours. Both halves were colorimetered after 48 hours and 1 month, respectively. In third and fourth groups, the process was similar, but the patients drank cola and avoid eating any other colored agents and the teeth were colorimetered after 48 hours and 1 month, respectively. Color change values of each half were calculated according to CIE lab system. Sign test was used to compare values of etched and unetched halves. was set as significant. Results. A significant difference was observed in groups III and IV regarding comparison of of the etched and control enamel ( ). Conclusion. Exposure of etched enamel to colored agents in the first 24 hours after etching can affect its color which remains at least for one month.