2019 Volume 38 Issue 1 Pages 52-58
This study investigated the penetration range of 3 types of calcium hydroxide reagents in root canals and its influence on the bonding strength of adhesive resin cement. Bovine root canals were filled with each type of calcium hydroxide reagents and ultrasonically washed in distilled water after one week. The specimens were examined using an electron probe microanalyzer. Bonding strengths of the adhesive resin cement with each type of calcium hydroxide reagents to bovine root canal dentin and resin composite built-up abutment were examined using shear bond tests. The results showed that calcium hydroxide reagents remained not only on root canal walls but also in the dentinal tubules. However, the bonding strength of adhesive resin cement did not significantly change regardless of treatment with calcium hydroxide reagents. Therefore, the results revealed that calcium hydroxide reagents in root canals remained inside the dentinal tubules, but did not affect the bonding strength of the adhesive resin cement.
