Abstract
T he bonding of brackets to teeth has gained considerable interest among orthodontists. The relative ease of placement and the demonstrated stability of bracket attachments under stress account for the increased use of the current bonding techniques. The removal of the adhesive from the tooth after debonding, however, remains a timeconsuming and cumbersome procedure. The strength of the bond to tooth surfaces has been measured in a number of studies using a wide range of the available etching agents’ and adhesives.2 The forces required to shear the bracket and adhesive from the teeth in these studies, as well as the clinical results obtained to date, indicate that these bond strengths are far above those necessary in orthodontics. All these studies do not, however, consider the lower limits of bond strengths required for the brackets to be retained on teeth throughout treatment and then be easily removed at the time of debonding. The present study involves the use of different combinations of unfilled and filled resin to determine whether the bond strength can be reduced by this means to provide easy removal after debonding without sacrificing the adequacy of the bond strengths needed for the completion of treatment.
Published Version
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