Shear bond strength between brackets and porcelain veneers prepared with different methods / 实用口腔医学杂志

ABSTRACT

Objective:To test the effects of different preparation methods on the shear bond strength between porcelain veneers and the brackets.Methods:48 metal-porcelain veneers were randomly and evenly divided into two groups. The veneers in group 1 were grinded with stone, while others were intact. The veneers were bonded by acid etching,silicone coupler and acid etching combined with silicone coupler respectively.After bonding and 500 thermo cycle treatment, all veneers were submitted to shear bond strength test and the incidence of porcelain fracture was recorded.Results:The shear bond strength of the grinded samples was higher than that of the intact(P