The review reached no real conclusion apart from the lack of efforts to clinical ly evaluate the bonding efficiency of a wide range of orthodontic bracket-adhesive systems in terms of debonding force compared to laboratory-based in vitro and ex vivo studies
The aim of this study was to systematic ally review the available studies measuring the bond strength of  orthodontic bracket-adhesive system  under different experimental conditions in vivo .
Argon laser vs conventional visible light-cured orthodontic bracket bonding: an in-vivo and in-vitro study.
INTRODUCTION Many advantages of argon lasers have been reported , including high-speed orthodontic adhesive curing and less enamel demineralization . The purpose of this study was to compare bond strengths after curing with the argon laser ( 10 seconds ) and the conventional curing light ( 40 seconds ) in vivo and in vitro . METHODS Four premolars from each of 23 volunteers were r and omly assigned to either the argon laser group or the conventional light group for the in-vivo study . Shear bond strengths were measured after 14 days with custom- design ed debonding pliers . In-vitro bond strengths were measured by using 4 premolars from each of 25 volunteers .  Shear bond strength was measured after 14 days of thermocycling with the same protocol as the in-vivo study . Adhesive remnant index scores ( ARI ) were determined . RESULTS No significant differences were found in bond strengths according to curing method , dental arch , or sex . In-vivo results were significantly lower ( P < .05 ) than in-vitro results . A significant ( P < .05 ) difference in ARI scores between the curing methods was determined ; no significant correlation between mean bond strengths and ARI scores was determined . CONCLUSIONS Bond strength for argon laser curing is comparable to conventional light curing and is sufficient for clinical applications . Although the argon laser left more adhesive on the tooth surfaces on debonding , there was no increase in enamel surface fractures
The review reached no real conclusion apart from the lack of efforts to clinical ly evaluate the bonding efficiency of a wide range of orthodontic bracket-adhesive systems in terms of debonding force compared to laboratory-based in vitro and ex vivo studies
The aim of this study was to systematic ally review the available studies measuring the bond strength of  orthodontic bracket-adhesive system  under different experimental conditions in vivo .