Ceramic based on zirconium dioxide (ZD) is a modern, durable material for the manufacture of dentures. It is known that ZD is not etched as glass-ceramic, making it difficult to prepare this material before fixing.

OBJECTIVE

To study the impact of various methods of surface treatment of ZD-based ceramic on adhesive strength.

MATERIALS AND METHODS

Sandblasting with Al₂O₃ particles sized 50 μm and application of primers with 10-MDP phosphate monomer were used. Adhesive strength values for following 4 groups of samples were obtained: 1st group — RelyX U200 + sandblasting + Compofix new primer (n=9); 2nd group — Compofix + sandblasting + Compofix new primer (n=9); 3rd group — Panavia F 2.0 + sandblasting (n=9); 4th group (control) — Variolink Esthetic DC + sandblasting + Monobond Plus primer (n=9).

RESULTS

The highest strength of adhesion was in the 4th group — 48.71±5.71MPa, the smallest in the 3rd group — 9.49±35.24 MPa. Fully domestic components used in the 2nd group allowed to obtain values of 42.50±9.79 MPa. Adhesive strength in the 1st group was 34.11±4.78 MPa.

CONCLUSION

The absence of the 10-MDP-based primers application in the preparation of ZD ceramic reduces the adhesive strength between resin cement and its surface. The domestic set for fixation of dentures can be effectively used for ZD on the same basis as European analogue.