Coronal Leakage of two Different Root Canal Sealers

摘要

The objective of this study was the evaluation and comparison of coronal bacterial leakage of two different instrumentation techniques and two endodontic sealers Apexit Plus and EndoRez. Sixty-eight human teeth caries free were tested in this study. Cleaning and shaping was carried out with step-back and crown-down technique and irrigated with 2% NaOCl and 17% EDTA. After instrumentation roots were randomly divided into four groups, two control groups (positive and negative) and two experimental groups according to root canal sealer: thirty-two teeth of first group were obturated with Apexit Plus and thirty-two teeth of second group were obturated with EndoRez. These groups (1st and 2nd) were further subdivided into two subgroups (a and b) according to the root canal instrumentation technique. After setting time, the roots were incorporated in a leakage model a two chamber method and research on microleakage was conducted for 33 days. The minimum microleakage values were obtained from the teeth obturated with EndoREZ selaer and instrumented with crown-down technique. There were significant differences between the subgroups instrumented with step-back technique in terms of microleakage (T-testi=4.734, p=0.009). Neither instrumentation technique nor endodontic sealers could prevent coronal microleakage.