مقايسه ريزنشت آپيكالي چهار نوع كانال سيلر

Comparative Study of Apical leakage of Four Root Canal Sealers

Bachground: Root canal sealer is a helpful material to increase the quality of root canal obturation. The aim of this study which has been carried out in vitro and by the use of dye penetration method was comparison between apical leakage of four root canal sealers. Materials and Methods: In this study, 140 anterior natural teeth having one canal each, were divided into 4 experimental groups and 2 positive and negative control groups. Each of the four mentioned groups were obturated with one of four sealers; 1-AH26, 2-ZOE, 3- Apexit, 4-Dorifill and gutta percha with lateral condensation method. After decalcification procedures the teeth were put in India ink and centrifuged 3000 rpm for 15 minutes, and were left immersed in the dye for 72 hours. After longitudinally sectioning , the rate of dye penetration were studied by 3 dentists using double blind method, the results were analysed by Anova and t-test Results: The mean leakage of groups were as follows: AH26:3.08mm, ZOE:3.25mm, Apexit : 3.82mm, Dorifill:3.86 mm. There was no remarkable statistical difference between AH26 and ZOE in leakage rate but the difference in the results between Dorifill and ZOE were considerable. Conclusion: The results showed that the Ah26 sealers are the best from the apical leakage stand point. It needs a clinical long term study on human or animal for futher confirmation.