Different cements are used for cementation of orthodontic bands which have their own special sensitivity of manipulation, solubility and decompositions after setting reactions. Each of the above plays a particular role in detachment of the bands, increased possibility of caries and decalcification. The purpose of this study was to evaluate weight changes of three brands of zinc phosphate (ZP) cements.
Methods:
An experimental study was designed to compare 3 type of ZP cements. The cements were categorized according to ADA 8 index and the data were analyzed with electronic balance. Weight variations were recorded after 6 weeks floating the samples in water and data were subjected to analysis using repeated ANOVA test.
Results:
The mean weight loss amount of Ariadent ZP in day 42 versus the day 1 was the most(- 0.00690g). Harvard(-0.01250g) and Adhezor( -0.00733g) ZP cements came after. The changes in different times among 3 kinds of ZPs were statistically significant (p< 0.001).
Conclusions:
There is a significant difference in weight loss during the period of time among different types of ZP cements. Regard to each ones suggested manipulation standards by the manufacturers in this study, the differences probably comes from their compositions.