Ribeiro Fernando C, Souza-Gabriel Aline Evangelista, Marchesan Melissa A, Alfredo Edson, Silva-Sousa Yara T Correa, Sousa-Neto Manoel D
School of Dentistry, University of Ribeirão Preto, Ribeirão Preto, SP, Brazil.
J Dent. 2008 Jan;36(1):69-73. doi: 10.1016/j.jdent.2007.10.007. Epub 2007 Nov 28.
To evaluate the influence of different endodontic materials on root fracture susceptibility.
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.
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).
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.
评估不同根管治疗材料对牙根骨折易感性的影响。
将72颗下颌切牙在牙骨质釉质界下方1mm处截断，获得长度为12mm的牙根。使用Profile系统的旋转器械对牙根进行化学机械预备。根管充填采用以下充填材料（n = 12）：GI，未充填牙齿（对照）；GII，Endofill + 牙胶尖；GIII，Sealer 26 + 牙胶尖；GIV，AH Plus + 牙胶尖；GV，Epiphany + 牙胶尖；GVI，Epiphany + Resilon。在封闭剂凝固时间过后，将每个牙根嵌入丙烯酸树脂中。然后使用Instron测试机以1mm/min的速度对标本进行抗折试验。
方差分析显示，GI（162.16±41.4N）、GII（168.46±37.5N）、GIII（164.8
