A 5-year clinical review of bond failure with a no-mix adhesive (Right on)

The performance of 5941 stainless steel orthodontic brackets bonded with a no-mix adhesive (Right-on) in 563 patients was reviewed over a 5-year period. The effects of age and sex of the patient, treatment mechanics, operator experience, and arch location on the failure rate and mean survival time (MST) of bonded orthodontic brackets were examined. The overall failure rate was 8 per cent (MST 45.7 months). The failure rate of brackets was three times greater in patients aged less than 12 years at the start of treatment compared with those aged greater than 16 years at the start of treatment. The MST was significantly different between male and female patients. Brackets bonded in patients treated with Begg mechanics had a greater failure rate than those bonded in patients treated with other appliance mechanics. The failure rates and MST of brackets were significantly affected by all the variables examined.