An evaluation the sealing ability of a three retro-filling materials


Background: Retro end filling is important to establish a seal between the root canal space and the periapical tissue. The purpose of this in vitro study was to evaluate the quality of seals obtained with various retro-grade filling materials using dye penetration method of micro leakage measurement.Materials and methods: Forty extracted human single rooted teeth were used. Following root canal obturation, 30 teeth were divided into three experimental groups and each group was subjected to one of the three filling techniques: acold burnishing of gutta percha, bcalcium phosphate cement, csuper EBA cement. The remaining 10 teeth were considered as a control group. The teeth were placed in methylene blue dye for a period of 10 days after which they were washed, sectioned and the apical dye penetration measured.Results: The results showed that (CPC) and super EBA cement demonstrated less dye penetration than other experimental groups; the difference was statistically significant as compared with groups 1 & 4 and not significant as compared between groups 2&3.Conclusion: A general trend was observed that the apical leakage was found in all teeth but with different degrees, some leaked more than others, dye penetration was more with the cold burnished gutta percha