| Autor: |
Khan, Taimur, Ahad, Babar, Khan, Tahir Ali, Naseer, Amjid |
| Předmět: |
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| Zdroj: |
Pakistan Oral & Dental Journal; Jun2012, Vol. 32 Issue 1, p99-103, 5p |
| Abstrakt: |
The purpose of this in vitro study was to determine the effect of bleaching on shear bond strength of orthodontic brackets. This randomized control trial was performed over a period of 6 months in the department of orthodontics, de,Montmorency College of Dentistry, Lahore. A total of one hundred and forty extracted premolar teeth were included which were further divided into two groups. Group A was assigned as control group without bleaching and Group B as study group with bleaching. The teeth in both groups were embedded individually in acrylic placed in rubber moulds using a mounting jig so that the labial surfaces would be parallel to the applied force during the shear test. Group B was bleached with Pola office advanced tooth whitening system and were stored in a solution of 0.9% saline till they were bonded. The bonding process for both groups was then performed in a standard manner. After bonding bracket was properly positioned on its respective tooth. An occluso-gingival load was applied to the bracket producing a shear force at the bracket tooth interface using a computerized shear bonding testing machine. The results showed that there was no statistically significant difference between the shear bond strength of unbleached teeth and that of bleached teeth following a two weeks interval after bleaching. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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