title: Effect of calcium hydroxide dressing on the long-term sealing ability of two different endodontic sealers: an in vitro study.
abstract: 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.
  
  
  METHODS
  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 microL/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).
  
  
  CONCLUSIONS
  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.
authors: Department of Conservative Dentistry, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil. daibottcher@hotmail.com
authors: Daiana Elisabeth
authors: DE
authors: Böttcher
authors: Vinicio Hidemitsu Goto
authors: VH
authors: Hirai
authors: Ulisses Xavier
authors: UX
authors: Da Silva Neto
authors: Fabiana Soares
authors: FS
authors: Grecca
mesh_terms: D002126:Calcium Hydroxide / Q000737:chemistry* / Q000627:therapeutic use; D003188:Composite Resins / Q000737:chemistry* / Q000627:therapeutic use; D003763:Dental Leakage / Q000517:prevention & control*; D018772:Dental Marginal Adaptation; D004347:Drug Interactions; D006801:Humans; D011897:Random Allocation; D012387:Root Canal Filling Materials / Q000737:chemistry* / Q000627:therapeutic use; D012388:Root Canal Irrigants / Q000737:chemistry* / Q000627:therapeutic use; D012389:Root Canal Obturation / Q000379:methods; D018709:Statistics, Nonparametric; D013997:Time Factors
chemical_list: D003188:Composite Resins; C511498:Real Seal composite resin; D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; C074417:Endo-Fill; D002126:Calcium Hydroxide