Tensile bond strength of brackets after antioxidant treatment on bleached teeth

Abstract EN

To determine the effect of an antioxidant agent on the tensile bond strength values of metal brackets bonded with to human enamel after bleaching.

Materials and Methods : Thirty two sound human maxillary and mandibular premolars extracted for orthodontic reasons were collected.

All teeth had undamaged buccal enamel, no caries and no pre-treatment with any chemicals.

They were then stored in a solution of 0.1 % thymol before the experiment.

Results: In the present study, we found that , tensile bond strength in group of direct bonding after bleaching was lower than other groups when compared with control group and the difference was significant at level p< 0.05.

The present investigation confirmed that waiting for a period of 7 days after bleaching is sufficient to obtain ade-quate tensile bond strength for clinical conditions.

There was significant difference in tensile bond strength when the brackets that underwent direct bonding and ethanol with control group.

No signifi-cant difference in tensile bond strength was observed when compared with the bracket immersed in a distilled water & with control bracket.

Conclusions: In the present study we found that , tensile bond strength in group of direct bonding after bleaching were the lowest than other groups and when com-pared with the control group, the difference is significant.

There was a significant difference in tensile bond strength when comparing the group that underwent direct bonding with control group.