Purpose:
To compare the bleaching prognosis of sodium perborate mixed with either water or hydrogen peroxide
Materials/Methods:
- N= 47 intact human premolars extracted for orthodontic reasons
- Teeth photographed and were discolored with erythrocytes (18 days) and bleached with sodium perborate mixed with 30 % hydrogen peroxide (Group A), 3 % hydrogen peroxide (Group B), or water (Group C) and sealed with IRM. Fresh preparations were placed after 3 and 7 days. At 14 days, access sealed with composite and photographed. Artificial saliva storage and photographed at 3, 6, and 12 months. Two separate evaluators ranked them
Results:
- Non-significant results:Groups A and C maintained their shade
- In 20 % of Group B color regression was shown
Clinical Significance:
Mixing sodium perborate with hydrogen peroxide appears to be unnecessary