Evaluation the Quality Three Different Obturation Technique Using Multi-Slice Computed Tomography: An In-Vitro Study

After endodontic space has been completely cleaned, shaped and disinfected, a three-dimensional obturation of this space will be the ultimate objectiv e of endodontic therapy. With a durable three dimensional obturation any communication with the periodontium will be eliminated and prevented. The aim of this study was to use multi-slice CT scanning to determine: (i) number of voids (ii) diameter or length of voids and (iii) presence of voids at material/tissue interfaces in root canals obturated with: (a) E & Q Master (b) Lateral Condensation, and (c) Soft Core system. Thirty freshly extracted human mandibular premolar teeth were used in this study. After pr eparation of the root canals, the teeth were divided into three groups with 10 teeth in each groups. G1 obturated with E&Q master, G2 obturated with Lateral Condensation, and G3 was obturated with Soft Core. GuttaFlow was used as sealer for all groups. After obturation all the specimen were analyzed with multi-slice CT, the data obtained was statistically analyzed us ing ANOVA test followed by Duncan's multiple range test ,a val ue of p< 0.05 was considered statistically significant.Voids are obs erved in all groups, Neither technique was free of voids or p erfectly smooth. Overall, the canals that obturated with E&Q mas ter showed the lowest number of voids (3.0), whereas those ob turated with lateral condensation showed the highest number (3.9) and the differences was statistically significant. The canals t hat obturated with Soft core showed the highest mean of voids diameter ( 0.77 mm) , whereas those obturated with E&Q m aster and lateral condensation had the lowest mean (0.62 mm and 0.61 mm) respectively, and the differences were statisti cally significant. The percentage of outer voids was higher for a ll techniques than the inner voids. The presence of inner voids was the highest in canals that obturated with soft core system (9.230%). Conclusion: E&Q master of obturation show the low est number of voids. Obturation with Soft core show the highest m ean of voids diameter. In all obturation techniques, the outer voi ds was higher than inner voids.