Abstract
Design This was a randomised controlled trial (RCT) in the orthodontic department of a UK National Health Service hospital. Intervention Patients' teeth were bonded using a split-mouth technique, ie, randomly allocating the precoated brackets to upper left and lower right quadrants, and non-precoated brackets to the other quadrants. Outcome measure The clinical time required for bond up of upper and lower arches of both systems and the bond failure rate for the first 6 months were measured. Results A total of 33 patients were entered into the trial and 746 brackets (372 precoated and 374 non-precoated) were placed. There were no significant differences in either the clinical time required to place precoated brackets or bond failure rate compared with non-precoated brackets. Conclusions Neither the precoated nor the non-precoated brackets evaluated were clinically superior to the others in terms of bond failure rate in the first 6 months of fixed appliance treatment. The use of precoated brackets did not result in a significant reduction in clinical bonding time.
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