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[Effects of surface treatment and adhesive application on shear bond strength between zirconia and enamel]
Yinghui Li1, Buling Wu, Fengyang Sun
1Department of Stomatology, Nanfang Hospital/College of Stomatology, Southern Medical University, Guangzhou 510515, China. 494037134@qq.com
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.