The Effect Of Different Drinks On The Bond Strength Of Orthodontic Brackets

Objective: This study investigated the effects of different drinks on the bond strength of metal brackets.Methods: Investigate the influence of two different bases designs on the bond strength of metal brackets and buffering when they were kept in the different drinks, After the tests, a scanning electron microscope was used to determine the amount and the localization of erosion.Results: The results indicated that all drink subgroups had a reduced debonding resistance compared with their control subgroups; No statistical difference in debonding resistance was found between 4°C subgroups and 37°C subgroups; The Teeth which were kept in different drinks for five minutes on one time within 24 hours had lower bond strength than Teeth were kept in the drinks for five minutes on three equal time intervals and fifteen on one time within 24 hours; It was found that 75 per cent ethanol had a significant effect upon the bond strength of both adhesive; All drinks had high buffer capacity, the buffering of beer was higher than others.Conclusions: Acid soft drinks and alcoholic drink may be a causative factor in bond failure, No statistical difference in debonding resistance and temperature was found between them. Time and frequency influenced the bond strength of metal brackets. The effect of ethanol on the bond strength depended on the brackets base and adhesive. The capability of acid drinks to erode dental enamel depends not only on the pH of the drink, but also on its buffering effect. The drinks which had high buffering effect would had persistent corrosive capability.