title: Influence of different final irrigation regimens and various endodontic filling materials on vertical root fracture resistance.
abstract: OBJECTIVE
  The aim of this study was to evaluate the influence of different endodontic materials and final irrigation regimens on vertical root fracture (VRF) resistance.
  
  
  METHODS
  Eighty human teeth were prepared then assigned into two groups (n = 40) according to the final irrigations. G1: 5 mL, 5.25% sodium hypochlorite (NaOCl), G2: 5 mL, 2% chlorhexidine gluconate (CHX). Each group was assigned into four subgroups according to the obturation system used (n = 10): A: iRoot SP/single gutta-percha cone (SGP), B: Only iRoot SP, C: Mineral trioxide aggregate (MTA)-Fillapex/SGP, D: AH26/SGP. The specimens were embedded in acrylic molds and subjected to compressive loading at a rate of 1 mm min until VRF occurred. Data were analyzed via three-way ANOVA tests.
  
  
  RESULTS
  The statistically significant difference was found among groups (P < 0.05). The G1A and G1B and G1D revealed significantly higher-VRF values than G1C (P = 0.023). The roots filled with MTA-Fillapex revealed lower-VRF values than the other subgroups (P < 0.05). Groups irrigated with NaOCl had significantly lower-VRF values than the groups irrigated with CHX (P < 0.05).
  
  
  CONCLUSIONS
  Final irrigation regimens could alter VRF resistance of root canals filled with different obturation technique and root canal sealers.
authors: D D
authors: DD
authors: Sungur
authors: E
authors: E
authors: Altundasar
authors: E
authors: E
authors: Uzunoglu
authors: Department of Endodontics, Faculty of Dentistry, Hacettepe University, 06100, Sıhhiye, Ankara, Turkey.
authors: Z
authors: Z
authors: Yilmaz
mesh_terms: D017607:Aluminum Compounds; D017610:Calcium Compounds; D004338:Drug Combinations; D006171:Gutta-Percha; D006801:Humans; D010087:Oxides; D012387:Root Canal Filling Materials / Q000494:pharmacology*; D018915:Root Canal Preparation / Q000379:methods*; D017640:Silicates; D012973:Sodium Hypochlorite; D014092:Tooth Root / Q000293:injuries*; D015035:Zinc Oxide-Eugenol Cement
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D004338:Drug Combinations; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; D015035:Zinc Oxide-Eugenol Cement; C112894:canals sealer; C086631:mineral trioxide aggregate; D006171:Gutta-Percha; D012973:Sodium Hypochlorite