[The effect of EDTA with different density on adhesive power of casting post and its scanning electromicroscopy (SEM)...

OBJECTIVE:To evaluate the effect of EDTA with different density on adhesive power of casting post.METHODS:Four different density of EDTA(5%,10%,15%,17%)were used to rinse the smear layer of root canal for 60 extracted teeth before they were cemented with ZP;on the other,a SEM observation was made on the rinse of root canal and the combination of adhesive and root canal.Meanwhile,a comparison was also made, after the rinse of EDTA,of tensile strength of casting post after their cement.RESULTS:EDTA with different density have different effect in the rinse of smear layer of root canal,it was proved by both SEM observation and the records of tensile strength of casting post. CONCLUSION:EDTA with density 10% is more effective in both the rinse of smear layer of root canal and the enhancement of adhesive power of casting post.