Coronal Microleakage of Four Restorative Materials Used in Endodontically Treated Teeth as A Coronal Barrier - An In Vitro Study

Abstract

The present in vitro study was undertaken to evaluate sealing ability of access restoration using, four different dentin adhesives under composite with conventional glass ionomer cement and resin modified glass ionomer cement as intracoronal barrier 65 extracted human maxillary premolars were randomly divided into 15 teeth each in 4 experimental groups and 5 intact teeth each in control group. Following the biomechanical preparation,all teeth were obturated using Protaper gutta percha points and AH plus sealer. Once the sealer set, about 3mm of gutta-percha was removed from canal orifice in all the teeth. The base was placed till canal orifice extending 1mm coronally. All the specimens were thermocycled for 500 cycles at 5° – 55° c for 30 sec, and then placed in Rhodomine 6G fluorescent dye for 24 hrs. The coronal leakage was measured under a fluorescent microscope. Data obtained from the study were subjected to statistical analysis using one way Anova Test and Tukey’s HSD test. RESULTS - It showed statistically significant difference in coronal leakage among all the groups, but with no statistically significant difference seen between high strength glass ionomer cement (Group I and Group II) and Ketac N 100 (group III and Group IV when placed as intraorifice barrier. CONCLUSION - Under the limitations of the present study the following conclusions were made that, Composite restoration with Xeno III adhesive and Ketac N 100 as intraorifice barrier showed better coronal sealing ability in access cavities.