The effect of Dentin Bonding Agent on the Prevention of Tooth Discoloration Induced by CEM cement

</strong> considering to importance of esthetic in dentistry and possibility of tooth discoloration due to using of different biomaterials; The purpose of this study was to investigate the effect of Dentin Bonding Agent on the Prevention of Tooth Discoloration Induced by CEM cement.</span>
 
</strong>to do his analytical and exprimental study, 60 extracted maxillary central incisors were randomly divided into three groups: CEM without DBA, CEM + DBA cement, and control group and the realated material placed into pulp chamber in each group. Then, the color of the teeth was evaluated before placing the CEM (T0) cement, after contact (T1), after 1 day (T2), 7 days (T3) and 30 days (T4), and the amount of discoloration was calculated and it is registered. Finally, all data analyzed using T-Test  and Repeated Measure test
 
Results</strong>: The results of this study showed that the cement group DBA + CEM was significantly less than the CEM group at all times (immediately after placement of CEM cement, one day, 7 days later and 30 days later) There are no significant difference (P <0.05) compared to the control group with DBA + CEM cement, as well as between CEM control and cement (p-value <0.05).
 
</strong> This study showed although placing dental bonding agents could reduce tooth discoloration due to cement cement, but does not prevent color discoloration.