title: Comparison between gutta-percha and resin-coated gutta-percha using different obturation techniques.
abstract: BACKGROUND
  The aim of this study was to evaluate and compare the obturation quality between canals obturated with gutta-percha/AH Plus sealer (GP group) and resin-coated GP/EndoREZ® sealer (ER group).
  
  
  METHODS
  A total sample of 90 mandibular premolar teeth was divided into 2 groups (2 × 45 canals): the GP group and ER group. Each group was further divided into 3 subgroups (n = 15): cold lateral compaction (CLC), warm lateral compaction (WLC) and single cone (SC). The teeth were subsequently embedded in resin and sectioned horizontally at 1, 3, 6 and 9 mm. All sections were then viewed with a stereomicroscope at ×40 magnification. The area occupied by core filling materials was determined using Cell^D software.
  
  
  RESULTS
  With CLC, the percentage of core filling materials in the ER group was significantly higher than in the GP group at the 1- and 3-mm levels. Similarly, with WLC, the percentage of core filling material in the ER group was significantly higher than in the GP group at the 1-, 3- and 9-mm levels. With SC, the percentage of core filling materials in the ER group was significantly higher than in the GP group at all levels.
  
  
  CONCLUSIONS
  It can be concluded that the resin-coated GP/EndoREZ® sealer is superior to the gutta-percha/AH Plus in the percentage of core filling material.
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Lembah Pantai, Kuala Lumpur - Malaysia.
authors.forename: Nashwan A
authors.initials: NA
authors.lastname: Al-Afifi
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Lembah Pantai, Kuala Lumpur - Malaysia.
authors.forename: Mariam
authors.initials: M
authors.lastname: Abdullah
authors.affiliation: Department of Diagnostic and Integrated Dental Practice, Faculty of Dentistry, University of Malaya, Lembah Pantai, Kuala Lumpur - Malaysia.
authors.forename: Samah M
authors.initials: SM
authors.lastname: Al-Amery
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Lembah Pantai, Kuala Lumpur - Malaysia.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Abdulmunem
mesh_terms: D001641:Bicuspid; D005260:Female; D006171:Gutta-Percha / Q000737:chemistry* / Q000494:pharmacology; D006801:Humans; D008297:Male; D012117:Resins, Synthetic / Q000737:chemistry* / Q000494:pharmacology; D018915:Root Canal Preparation
chemical_list: D012117:Resins, Synthetic; D006171:Gutta-Percha