title: Effect of different root canal sealers on fracture strength of simulated immature roots.
abstract: OBJECTIVE
  The objective of this study was to compare the effects of different root canal sealers on fracture resistance of simulated immature teeth.
  
  
  METHODS
  One hundred eight roots were divided into 9 groups. The roots were instrumented except the negative controls. Four millimeters of mineral trioxide aggregate (MTA) barriers were placed apically. The roots were backfilled as follows: group 1, AH Plus+gutta-percha; group 2, EndoREZ+gutta-percha; group 3, EndoREZ+Resilon; group 4, Hybrid Root SEAL+gutta-percha; group 5, Hybrid Root SEAL+Resilon; group 6, iRootSP+gutta-percha; group 7, iRootSP+Resilon; group 8, No obturation other than MTA barrier; group 9, No instrumentation, no obturation. A compressive loading was applied at a speed of 1 mm/min. Data were compared with ANOVA and Duncan tests.
  
  
  RESULTS
  Group 5 showed the highest resistance to fracture. The fracture values of group 3 were lower than those of the other experimental groups.
  
  
  CONCLUSIONS
  Hybrid Root SEAL and iRootSP reinforce the simulated immature roots against fracture when used with either gutta-percha or Resilon.
authors.affiliation: Faculty of Dentistry, Department of Restorative Dentistry and Endodontics, Gazi University, Ankara, Turkey. ilkeatasoy@yahoo.com
authors.forename: Özgür İlke Atasoy
authors.initials: Öİ
authors.lastname: Ulusoy
authors.forename: Yelda
authors.initials: Y
authors.lastname: Nayır
authors.forename: Sis
authors.initials: S
authors.lastname: Darendeliler-Yaman
mesh_terms: D017607:Aluminum Compounds / Q000737:chemistry; D017610:Calcium Compounds / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D003799:Dental Stress Analysis / Q000295:instrumentation; D004338:Drug Combinations; D004853:Epoxy Resins / Q000737:chemistry; D006171:Gutta-Percha / Q000737:chemistry; D006801:Humans; D006813:Humidity; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D010087:Oxides / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012389:Root Canal Obturation / Q000379:methods; D018915:Root Canal Preparation / Q000379:methods; D017640:Silicates / Q000737:chemistry; D013314:Stress, Mechanical; D013696:Temperature; D013997:Time Factors; D014082:Tooth Fractures / Q000503:physiopathology*; D014092:Tooth Root / Q000503:physiopathology*
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D003188:Composite Resins; D004338:Drug Combinations; C481259:EndoRez; D004853:Epoxy Resins; D008689:Methacrylates; D010087:Oxides; D019279:Resin Cements; D012387:Root Canal Filling Materials; D017640:Silicates; C534916:epoxy resin-based root canal sealer; C534239:metaseal; C086631:mineral trioxide aggregate; C486892:resilon sealer; D006171:Gutta-Percha; C031293:calcium silicate