This study was designed to examine three different treatment techniques (etching, bleaching, or etching with bleaching) to determine the most effective technique(s) for decreasing the amount of tetracycline staining; and the effects of each treatment technique immediately after, and up to four weeks after treatment to determine the permanence of the results of each of these techniques.
- N= 7 mongrel puppies that received tetracycline pre and post partum. Canines and third lateral from 4 quads used. 56 teeth
- Group A: Etched-only teeth. The labial surface was soaked with 50% phosphoric acid for one minute.
- Group B: Bleached-only teeth. Hydrogen peroxide-soaked cotton pellets were applied to the labial surface for 20 minutes. Heat (125 F) was applied to the cotton pellet.
- Group C: Etched and bleached teeth. Combination of group a followed by group b protocol.
- Group D: Control
The teeth were treated twice one week apart from each other and teeth were photographed at certain intervals.
The three treatment methods did have a statistically significant immediate effect on shade change.
- Least effective: bleach alone or etching alone
- Most effective: the combination of the two.
- After one week, the shades returned to pretreatment levels for all groups.
Vital Bleach for tetracyline stain is not effective