1992 Volume 36 Issue 2 Pages 257-263
The adhesiveness between the porcelain and the etched enamel was studied under the various conditions. The porcelain surface was treated with Laminabond porcelain primer or Clapearl bonding agent, then adhered to the etched enamel mediated with Laminabond composite paste or Clapearl DC. The resin thickness was 150 or 400 μm, and the irradiation time was 120s or 240s. The shear bond strengths were measured after one day immersion in 37°C water and after10, 000 thermocycles between 4°C and 60°C.
When resin thickness was 150 μm, the little decrease of the bond strengths after thermocycles was observed. While in the case of 400 μm resin thickness, the high and durable adhesion between the masking porcelain and the etched enamel was obtained with the use of Clapearl bonding agent and Clapearl DC, or with 240 s photo irradiation.
The polymerization of the cemented resin was an important role in the adhesionbetween the porcelain and the etched enamel.
