The effect of fluoridation on discoloring of bleached teeth.
10.4047/jkap.2009.47.3.257
- Author:
Hyang Ah JANG
1
;
Kyu Won SUH
;
Jae Jun RYU
Author Information
1. Department of Esthetic Restorative Dentistry, Graduate School of Clinical Dentistry, Korea University, Korea. koprosth@unitel.co.kr
- Publication Type:Original Article ; Randomized Controlled Trial
- Keywords:
bleaching;
fluoridation;
discoloring;
spectrophotometer
- MeSH:
Coffee;
Coloring Agents;
Fluoridation;
Fluorides;
Hydrogen-Ion Concentration;
Immersion;
Tooth
- From:The Journal of Korean Academy of Prosthodontics
2009;47(3):257-265
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
STATEMENT OF PROBLEM & PURPOSE: To study the effect of different fluoridation methods after in-office bleaching on the color of teeth during severe staining with coffee. MATERIAL AND METHODS: 44 specimens were randomly divided into four groups. Group 1 (no bleaching, no fluoride, coffee) was served as control for the influence of coffee on the color of untreated teeth. Group 2, 3 and 4 were undergone bleaching with 35% H2O2 for 30 minutes a day on 3 consecutive days. Group 2 was remained without fluoridation. Group 3 and 4 were fluoridated for 1 hour with either Cavity shield(R) or pH 7 Gel(R). All of groups were immersed in coffee solution for 7 days. Color determination was accomplished using the spectrophotometer (VITA Easyshade(R)). RESULTS: Delta L and Delta h increased, whereas Delta C decreased in the bleached groups. Pairwise comparisons with Tukey's HSD showed that there were statistically significant differences for Delta L and Delta h between the bleached groups and the non-bleached group (P < .05). Delta L and Delta h decreased continuously, while DeltaC showed an increase after a decrease in all of groups during immersion in coffee solution. After immersion in coffee solution for 7 days there were no statistically significant differences for Delta L, Delta C and Delta h between the groups (P > .05). Also there were no statistically significant differences for Delta L, Delta C and Delta h between the group 3 treated with Cavity shield(R) and the group 4 treated with pH 7 Gel(R) (P > .05). CONCLUSION: It was concluded that fluoridation was not beneficial to the prevention of extrinsic stains after bleaching.
