Study on Bond Strength of Adhesive Resin Cement to Dentin. Influences of Temporary Cementation and Pre-treatment Prior to Adhesion.

The differences due to the types of temporary cement and the period of temporary cementation as well as the effect of the pre-treatment during the adhesion on adhesive strength of the adhesive resin cement and dentin were evaluated by performing shearing adhesive strength test, by determining contact angle, and by scanning electron microscopy.The results were as follows:1. In Bistite Resin Cement and Imperva Dual, adhesive strength significantly increased more by etching treatment than by primer treatment. When Super Bond C & B was used, adhesive strength was 20 MPa or more regardless of the type of temporary cement and the period of temporary cementation. When Panavia 21 was used, adhesive strength increased significantly as the period of temporary cementation became longer except HY-BOND temporary cement.2. On the surface of dentin after removal of temporary cement, except HY-BOND temporary cement, and cleaning, the contact angle of the surface of dentin significantly decreased. After etching treatment, the contact angle of the dentin surface increased in most of the cases as the period of temporary cementation became longer.3. After the removal of temporary cement and cleaning, temporary cement remained on the surface of dentin, and the primer treatment of the dentin surface after removal of temporary cement and cleaning was not effective. However, by performing etching treatment on the dentin surface after the removal of temporary cement, except HY-BOND temporary cement and cleaning, smear plug was removed.