title: Evaluation of the sealing ability of gutta-percha and thermoplastic synthetic polymer-based systems along the root canals through the glucose penetration model.
abstract: OBJECTIVE
  To compare the sealing ability of gutta-percha and thermoplastic synthetic polymer-based systems along the root canals using a recently introduced glucose penetration model.
  
  
  METHODS
  Premolars (n = 156) instrumented to an apical size of .06/40 were divided into 12 experimental and 2 control groups. The root canals were filled with either gutta-percha (groups 1-6) or Resilon (groups 7-12) core materials combined with AH Plus (groups 1, 4, 7, 0), Ketac Endo (groups 1, 5, 8, 11), or Epiphany (groups 2, 6, 9, 12), using cold lateral compaction (groups 1-3, 7-9) or System B with Obtura II (groups 4-6, 10-12). The leaked glucose concentration was measured spectrophotometrically at 1, 8, 15, 22, and 30 days. Percentage leaking of each group was also calculated. Data were recorded as mmol/L and statistically analyzed with Kruskal-Wallis and Mann-Whitney U tests (P = .05).
  
  
  RESULTS
  Throughout the experimental period Resilon/Ketac-Endo/cold lateral compaction (group 8) showed the highest mean cumulative glucose penetration (mmol/L) (17.27 +/- 10.32), whereas Resilon/AH Plus/cold lateral compaction (group 7) had the least (3.36 +/- 4.65) (P < .05). At the 30(th) day, the least leaking percentage was observed in gutta-percha, Epiphany/cold lateral compaction (group 3). Glucose penetration was affected by the obturation technique in some groups. Ketac-Endo either with gutta-percha (group 2) or Resilon (group 8) indicated significantly less glucose penetration in warm technique, whereas gutta-percha/Epiphany (group 3) had significantly less glucose penetration in cold technique (P < .05).
  
  
  CONCLUSIONS
  All material/technique combinations allowed glucose penetration. Gutta-percha/AH Plus combinations allowed similar patterns of glucose penetration to Resilon/Epiphany combinations.
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Suleyman Demirel University, Isparta, Turkey.
authors.forename: B Ureyen
authors.initials: BU
authors.lastname: Kaya
authors.forename: Ayşe Diljin
authors.initials: AD
authors.lastname: Kececi
authors.forename: S
authors.initials: S
authors.lastname: Belli
mesh_terms: D016009:Chi-Square Distribution; D003763:Dental Leakage; D005947:Glucose; D006171:Gutta-Percha / Q000737:chemistry* / Q000627:therapeutic use; D006801:Humans; D012387:Root Canal Filling Materials / Q000737:chemistry* / Q000627:therapeutic use; D012389:Root Canal Obturation / Q000379:methods*; D012680:Sensitivity and Specificity; D013053:Spectrophotometry / Q000379:methods; D018709:Statistics, Nonparametric; D013549:Sweetening Agents
chemical_list: D012387:Root Canal Filling Materials; D013549:Sweetening Agents; C486892:resilon sealer; D006171:Gutta-Percha; D005947:Glucose