Influence of Calcium Hydroxide Dressing on Apical Marginal Leakage After Obturation with Gutta-Percha

الملخص

The aim of this study was to detect the effect of calcium hydroxide medicament on the apical marginal leakage after obturation of root canal system.40 freshly extracted single rooted human teeth were selected, all the root canals were hand- instrumented. They were randomly divided into two groups of 20 teeth each. Group (A) has no intracanal medicament, group (B) were dressed with Ca(OH)₂ paste for 7 days groups. After that all groups were obturated with lateral compaction technique using gutta-percha points and zinc oxide-eugenol cement. Then the access was sealed with GIC cement. The teeth were immersed into 2% mythylene blue solution, The specimens were placed in an incubator at 37°C, with moisture at 100%, for 7 days. After that the roots were sectioned longitudinally and examined with stereomicroscope and liner leakage was measured.The results showed that the leakage in Ca(OH)₂ group was significantly less than control group which received no medicament. (p<0,05). Under the conditions of this study, it can be concluded that the use of dressing of Ca(OH)2 for 7 days led to decrease the apical marginal leakage.