Effect of calcium hydroxide dressing on the long-term sealing ability of two different endodontic sealers: An in vitro study

Objective. The aim of this in vitro study was to evaluate the long-term sealing ability of Real Seal system and Endofill after calcium hydroxide (CH) dressing, by using a fluid filtration model. Study design. Four randomized groups of single-rooted teeth (N = 110) were prepared using a crown-down technique to a size 50 file. Two groups (1 and 2) received CH dressing before filling. Roots were filled with gutta-percha and Endofill (groups 2 and 4) or Resilon and Real Seal (groups 1 and 3). Leakage was measured by using the fluid filtration method after 90 days and determined as mu L/min.10 psi. Results. Statistical analysis by Kruskal-Wallis and Mann-Whitney tests indicated that CH dressing groups showed higher leakage values than those where CH was not used (P = .001). Conclusion. It may be concluded that the use of CH as an intracanal dressing material affected the sealing ability of both Real Seal and Endofill sealers. (Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2010;110:386-389)