There was insufficient evidence to assess the effect of bonding modality on demineralization rates .
CONCLUSIONS There is weak evidence indicating higher odds of failure with self-etch primer than acid etch over 12 months in orthodontic patients , and there is strong evidence that a self-etch primer is likely to result in a modest time savings ( 8 minutes for full bonding ) compared with acid etch
INTRODUCTION The use of self-etch primers has increased steadily because of their time savings and greater simplicity ; however , overall benefits and potential disadvantages and harms have not been assessed systematic ally .
In this study , we review ed r and omized controlled trials to assess the risk of attachment failure , bonding time , and demineralization adjacent to attachments between 1-stage ( self-etch ) and 2-stage ( acid etch ) bonding in orthodontic patients over a minimum follow-up period of 12 months .
Long-Term Clinical Evaluation of Bracket Failure with a Self-Etching Primer: A Randomized Controlled Trial
Objective A long-term comparison of the failure rates of orthodontic brackets bonded with either a self-etching primer ( SEP ) or conventional etch and primer ( AE ) . Design Prospect i ve r and omized controlled clinical trial . Setting UK district general hospital with one operator , 2003–6 . Participants Hospital waiting list patients needing fixed appliances ( n=60 ) . Method  Experimental ( SEP ) group patients ( n=30 ) received pre-adjusted edgewise brackets ( n=438 ) bonded with Transbond Plus following manufacturer 's instructions .  Control ( AE ) group patients ( n=30 , brackets n=433 ) were bonded using a 15-second conventional etch and primer ( Transbond XT ) . In both groups brackets were light-cured for 20 seconds . First-time bond failures were recorded with the time of failure . Bracket bonding time was recorded . All patients were followed to the end or discontinuation of treatment . Results Bracket failure rates : SEP=4.8 % , AE=3.5 % , P=0.793 . Mean placement time per bracket ( seconds ) : SEP=75.5 ( ±6.7 ; 95 % CI=72.9 , 78.0 ) , AE=97.7 ( ±9.1 ; 95 % CI=94.3 , 101.2 ) P=0.000 . Conclusion There was no difference in the failure rates of brackets bonded with either Transbond Plus SEP or conventional AE using Transbond XT paste . Bonding with SEP was significantly faster than using conventional AE
There was insufficient evidence to assess the effect of bonding modality on demineralization rates .
CONCLUSIONS There is weak evidence indicating higher odds of failure with self-etch primer than acid etch over 12 months in orthodontic patients , and there is strong evidence that a self-etch primer is likely to result in a modest time savings ( 8 minutes for full bonding ) compared with acid etch
INTRODUCTION The use of self-etch primers has increased steadily because of their time savings and greater simplicity ; however , overall benefits and potential disadvantages and harms have not been assessed systematic ally .
In this study , we review ed r and omized controlled trials to assess the risk of attachment failure , bonding time , and demineralization adjacent to attachments between 1-stage ( self-etch ) and 2-stage ( acid etch ) bonding in orthodontic patients over a minimum follow-up period of 12 months .