Influence of different endodontic filling materials on root fracture susceptibility.
OBJECTIVE
To evaluate the influence of different endodontic materials on root fracture susceptibility.


METHODS
Seventy-two mandibular incisors were sectioned 1mm below the cementoenamel junction to obtain roots of 12 mm length. Roots were submitted to chemomechanical preparation with the rotary instruments of Profile system. The obturation of root canals were performed with the following filling materials (n=12): GI, unfilled teeth (control); GII, Endofill+gutta-percha; GIII, Sealer 26+gutta-percha; GIV, AH Plus+gutta-percha; GV, Epiphany+gutta-percha; GVI, Epiphany+Resilon. After the sealers setting time, each root was embedded in acrylic resin. The specimens were then submitted to fracture resistance test using an Instron testing machine at 1mm/min.


RESULTS
The ANOVA test showed no significant statistical difference (p>.05) among GI (162.16+/-41.4N), GII (168.46+/-37.5N), GIII (164.83+/-35.7N), GIV (168.29+/-38.7N), GV (172.36+/-20.6N) and GVI (193.11+/-42.8N).


CONCLUSIONS
The core materials (gutta-percha or Resilon) combined with the tested endodontic sealers are not able to increase the root fracture resistance in canals submitted to chemomechanical preparation.
School of Dentistry, University of Ribeirão Preto, Ribeirão Preto, SP, Brazil.
Fernando C
FC
Ribeiro
Aline Evangelista
AE
Souza-Gabriel
Melissa A
MA
Marchesan
Edson
E
Alfredo
Yara T Correa
YT
Silva-Sousa
Manoel D
MD
Sousa-Neto
D000704:Analysis of Variance; D016001:Confidence Intervals; D006801:Humans; D012387:Root Canal Filling Materials / Q000737:chemistry*; D014082:Tooth Fractures / Q000517:prevention & control*; D014092:Tooth Root / Q000737:chemistry / Q000293:injuries*
D012387:Root Canal Filling Materials