[The bond properties of Vitadur alpha on dental zirconia framework material]

To evaluate the bond properties of Vitadur alpha on dental zirconia framework material.

Vitadur alpha was sintered on the surface of four groups' presintered zirconia ceramic plates which were dealt with respective procedures. SEM, energy distribution spectrum and thermal shock test were applied to evaluate the sintering properties of such interfaces. Shear bond strength of Vitadur alpha-zirconia interfaces were measured, and the results were analysed by ANOVA method.

Satisfying result was obtained in Vitadur alpha sintered on the zirconia framework material, furthermore, chemical combination between the two laminates were confirmed by means of energy distribution spectrum. The shear bond strength of 3Y-TZP-Vitadur alpha dentin differed under different surface conditionings: highest shear bond strength appeared in the group conditioned with water sand paper (35.1662MPa), shear bond strength of the group conditioned with sandblast (27.8283MPa) was better than that of non-conditioning group (20.9677MPa), diamond condition group had the lowest shear bond strength (15.3025MPa), significant difference existed between each group (P<0.01).

Further clinical research could be carried out on Vitadur alpha and zirconia ceramic framework under conditioning with sandblast.