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.
Ribeiro
Fernando C
FC
School of Dentistry, University of Ribeirão Preto, Ribeirão Preto, SP, Brazil.
Souza-Gabriel
Aline Evangelista
AE
Marchesan
Melissa A
MA
Alfredo
Edson
E
Silva-Sousa
Yara T Correa
YT
Sousa-Neto
Manoel D
MD
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