The effects of tooth bleaching agents on microhardness of enamel in situ.
10.5395/JKACD.2006.31.6.470
- Author:
Yoon Woo PARK
1
;
Se Hee PARK
;
Jin Woo KIM
;
Kyung Mo CHO
Author Information
1. Department of Conservative Dentistry, College of Dentistry, Kangnung National University, Korea. drbozon@kangnung.ac.kr
- Publication Type:Original Article
- Keywords:
Whitening strip;
Tooth whitening gel;
Enamel;
Microhardness
- MeSH:
Delivery of Health Care;
Dental Enamel*;
Family Characteristics;
Hardness;
Humans;
Hydrogen;
Incisor;
Orthodontic Brackets;
Tooth Bleaching Agents*;
Tooth Bleaching*;
Tooth*;
Urea;
Volunteers
- From:Journal of Korean Academy of Conservative Dentistry
2006;31(6):470-476
- CountryRepublic of Korea
- Language:English
-
Abstract:
The objective of this in situ study was to evaluate the effects of whitening strip (Claren, LG Household & Health Care Ltd, 2.6% hydrogen peroxide) and gel (Opalescence, Ultradent, 10% carbamide peroxide) on microhardness of enamel in comparison with untreated control. Extracted twenty human upper incisors were disinfected, cleaned, and labial side of each incisor sectioned into 3 fragments by 2 x 2 mm size. After sectioning, labial sides of fragments were flattened and fixed to orthodontic bracket using flowable composite resin. Specimens prepared from each tooth were attached to the labial side of upper incisors of twenty volunteers one by one and treated by three different methods: (1) untreated control (2) treated with whitening strip for 14 days (3) treated with whitening gel for 14 days. Microhardness (Microhardness tester, Zwick) of each specimen was measured at the baseline of pre-treatment, immediate after bleaching treatment, 14 days after bleaching treatment and Knoop Hardness Number was determined. Microhardness changes of experimental groups were compared. The results show that tooth whitening strip and gel used in this study does not effect the micro-hardness of enamel during bleaching procedure.
