Conventional adhesive bonding is a multi-step procedure involving acid etching of the enamel followed by bonding agent application and placement of orthodontic bracket with composite adhesive on the tooth.
It was introduced to the market in an effort to reduce chair time by modifying the bonding procedure from three to two steps by elimination of use of bonding resin with flowable composites.
Direct application of flowable composite on the etched enamel without bonding resin reduces the number of steps during bonding, saves the treatment time and procedural errors associated with salivary contamination.
The rationale of this study was to assess shear bond strength (SBS) achieved with flowable composite without intermediate bonding resin which is able to provide adequate bond strength with fewer procedural steps can help in decreased chair side timings and reducing contamination risk as well as stronger bonding between orthodontic metal brackets and tooth structure for longer duration of orthodontic treatment.
Group A (Control Group) consisted of teeth on which flowable composite with bonding resin was used whereas Group B (Experimental Group) included teeth with flowable composite without the use of intermediate bonding resin.
13,14,15 Traditionally, the use of intermediate bonding resin is considered an essential step as it allows good wetting and penetration of the enamel surface which subsequently increases bond strength of composite with enamel.
Thus if flowable composite provides adequate shear bond strength they will clearly provide an advantage over traditional composites for orthodontic bracket bonding.