Bond Strengths of Alumina-glass and Zirconia-glass Composites to Opaque-Dentine Porcelain

摘要

This study was conducted to evaluate shear bond strength between self-made alumina glass composites (AGC), zirconia glass composites (ZGC) and Vita alpha opaque-dentine porcelain, and also evaluate the effects of different surface treating methods on the bond strength. The AGC and ZGC specimens were treated differently and then bonded with Vita alpha opaque-dentine porcelain. The bond strength was measured by shear test and the surface treating methods included no-treatment, sandblasting and etching. The results showed that the values of bond strength for AGC groups were 30.1, 41.1 and 41.9 MPa respectively, and the bond strength of both sandblasting group and etching group were significantly higher than that of the untreated group; the bond strength of ZGC groups were 60.2, 63.6 and 35.5MPa respectively, and the value of sandblasting group was significantly higher while etching group was lower than that of untreated group. These results indicated that Vita alpha opaque-dentine porcelain can be well sintered to self-made AGC and ZGC. Sandblasting can greatly improve the bond strength for both AGC and ZGC, while the etching treating method had different effect on their bond strengths.