Evaluation of different flowable materials for bonding brackets

To compare the shear bond strength and the adhesive remnant on the tooth after debonding of brackets bonded with a traditional orthodontic resin (Transbond XT), a flowable composite (X-Flow), a flowable compomer (Dyract Flow) and a flowable giomer (Beautifil Flow).

105 extracted human premolars were used. They were divided into four groups: (1) Transbond XT, (2) X-Flow, (3) Dyract Flow, and (4) Beautifil Flow. Shear bond strength was measured using a universal testing machine with a cross-head speed of 1 mm/minute. The adhesive remnant on the tooth after debonding was quantified using image analysis.

No significant differences were found between the shear bond strengths of the different groups evaluated (P > 0.05). Transbond XT left significantly more adhesive on the tooth than the three flowable materials, and among the flowable materials, X-Flow left significantly less adhesive than Beautifil Flow (P < 0.008).