Objective: To evaluate the effects of sandblasting and different orthodontic adhesives on shear bond strength between zirconia and enamel.
Methods: Zirconia ceramic samples were designed and manufactured for 40 extracted human maxillary first premolars with CAD/CAM system. The samples were randomized into 4 groups for surface treatment with sandblasting and non-treated with adhesives of 3M Transbond XT or Jingjin dental enamel bonding resin. After 24 h of bonded fixation, the shear bond strengths were measured by universal mechanical testing machine and analyzed with factorial variance analysis.
Results: The shear bond strength was significantly higher in sandblasting group than in untreated group (P<0.05) and comparable between the two groups with the adhesives of Transbond XT and dental enamel bonding resin (P>0.05).
Conclusion: The shear bond strength between zirconia and enamel is sufficient after sandblasting regardless of the application of either adhesive.