Method: The study was performed as a single centre randomised controlled clinical trial using a split mouth technique. The two test materials were allocated using block randomisation; the Ideal 1 bonding system to one side of the arch and Transbond XT with Transbond Plus to the other. Any bracket failures were recorded and for this abstract the trial was censored at one year. Prior to commencing a power calculation suggested 33 patients would be required for the trial.Despite the predicted number of patients required for the trial, the number of patients participating was not reached due to catastrophic failure of one of the test cements, requiring statistical re-evaluation of the data and discontinuation of recruitment for the trial.
Results: A total of 137 brackets were bonded in the trial, of these 7 failed in the Transbond group and 22 failed in the Ideal 1 group at the time of censoring. Statistical comparison using a modified Wilcoxon test showed a significant difference between the two test materials for bracket failure. The Ideal 1 material having significantly more bracket failures than those bonded with Transbond Plus and Transbond XT group (p < 0.005).
Conclusion:There was a significant difference between the two test cements for bracket failure at a censor date of 1 year.