Comparative evaluation of the fracture resistances of endodontically treated teeth filled using five different root canal filling systems.
The aim of this study was to compare the fracture resistances of teeth filled using different root canal sealers and rials.



One hundred and twenty single rooted mandibular human incisor teeth with single canals were divided into 5 experimental groups of 20 teeth with 2 control groups of 10 teeth each. After root canal shaping using K3 rotary instruments, root canals were filled as follows: Group 1: (-) control, Group 2: (+) control, Group 3: Gutta-percha/AH Plus, Group 4: Thermafil/AH Plus, Group 5: Resilon/Epiphany self-etch (Epiphany SE), Group 6: Gutta-percha/Epiphany SE ve Group 7: EndoREZ sealer/EndoREZ cone. After the root canal sealers set, the apical 4 mm. portions of the specimens were embedded in cold curing acrylic and a fracture resistance test was applied in a universal testing machine. The load at which fracture occurred was recorded for each group and statistically analyzed using one-way ANOVA and Tukey's honestly significant difference tests.



Resilon/Epiphany SE ve EndoREZ sealer/EndoREZ cone groups had lower fracture resistances compared with the negative control group consisted of teeth without root canal shaping (P < 0.05). Gutta-percha/AH Plus, Thermafil/AH Plus and Gutta-percha/Epiphany SE groups showed similar fracture resistances (P > 0.05). The fracture resistance of the instrumented, but unfilled positive control group was significantly lower compared with (-) control, Gutta-percha/AH Plus, Thermafil/AH Plus (P < 0.01) and Gutta-percha/Epiphany SE (P < 0.05) groups. There were no significant differences between the fracture resistances of the Resilon/Epiphany SE and EndoREZ sealer/EndoREZ cone and positive control groups (P > 0.05).



Root canal shaping procedures decrease the fracture resistance of teeth, and lateral condensation performed with AH Plus sealer and Gutta-percha and the Thermafil technique were found to be more successful.
T
T
Sandikci
Department of Endodontics, Faculty of Dentistry, Yeditepe University, Istanbul, Turkey.
R F
RF
Kaptan
D016022:Case-Control Studies; D003188:Composite Resins; D003786:Dental Pulp Cavity; D004853:Epoxy Resins / Q000627:therapeutic use; D006171:Gutta-Percha / Q000627:therapeutic use*; D006801:Humans; D007180:Incisor; D008422:Materials Testing; D012387:Root Canal Filling Materials / Q000627:therapeutic use*; D012389:Root Canal Obturation / Q000379:methods*; D018915:Root Canal Preparation; D012390:Root Canal Therapy / Q000379:methods; D014082:Tooth Fractures / Q000503:physiopathology* / Q000517:prevention & control*; D019553:Tooth, Nonvital / Q000503:physiopathology*; D015035:Zinc Oxide-Eugenol Cement
D003188:Composite Resins; C481259:EndoRez; D004853:Epoxy Resins; D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; C112894:canals sealer; C486893:epiphany sealer; C534916:epoxy resin-based root canal sealer; D006171:Gutta-Percha