Vishwanathan P Kashi, Muliyar Sabir, Chavan Prakash, Reddy P Manoranjan, Reddy T Praveen Kumar, Nilawar Sanjay
Department of Conservative and Endodontics, Rajas Dental College, Tirunelveli 627105, Tamil Nadu, India.
J Contemp Dent Pract. 2012 Nov 1;13(6):773-81. doi: 10.5005/jp-journals-10024-1228.
To compare the fracture resistance of teeth prepared with rotary system and filled with single cone guttapercha followed by lateral condensation with different sealers like zinc oxide eugenol and resin based (AH26) to that of resilon.
A total number of 70 extracted intact human permanent maxillary incisors were selected. All prepared samples were divided into one control group (n = 10) and three experimental groups (n = 20 per group). Group 1 control. This group received no obturation; the root canal opening was sealed with a temporary filling material (Cavit, Premier Dental Products, Plymouth Meeting, PA) Group 2: Gutta-Percha and zinc oxide Eugenol sealer. Group 3: Gutta-Percha and AH26 sealer. (DiaDent, Korea) dipped in AH26 sealer. Group 4: Resilon cones and RealSeal Resin Sealer. Obturation was accomplished using a 0.06 taper size 40 gutta-percha master point. All the root samples were stored in 100% humidity at 37 °C for 2 weeks to allow the sealer to set completely. The root samples were then prepared for mechanical testing and the data was recorded and analyzed statistically.
One-way ANOVA and Post hoc test (Duncan Multiple range test) were employed to determine possible statistical variation among the groups tested in this study. The force for group 2 was significantly greater than that for the control group 1 (no obturation).The force for group 3 was significantly greater than that for group 2. The force for group 4 was significantly greater than that for group 3. All other groupwise comparisons were not significant at 5% level. Group 4 seemed to have the greatest force among the three groups of interest in the study.
Root canals filled with Resilon increased the in vitro resistance of single canal extracted teeth compared to other experimental groups. The mean fracture resistance value for the experimental groups in ascending order was as follows: Root canals instrumented but not filled, filled with gutta-percha and zinc oxide eugenol sealer, filled with gutta-percha and AH26 sealer and filled with Resilon.
Resilon is a promising material for reinforcement of endodontically treated teeth.
比较用旋转系统预备根管、采用单根牙胶尖充填并配合侧向加压技术，分别使用氧化锌丁香酚和树脂类（AH26）封闭剂与使用Resilon进行根管充填后牙齿的抗折性能。
选取70颗完整拔除的人类上颌恒切牙。所有制备好的样本分为一个对照组（n = 10）和三个实验组（每组n = 20）。第1组为对照组，该组不进行根管充填，根管口用临时充填材料（Cavit，普瑞美牙科产品公司，普利茅斯会议，宾夕法尼亚州）封闭；第2组：牙胶尖与氧化锌丁香酚封闭剂；第3组：牙胶尖与AH26封闭剂（韩国DiaDent公司），牙胶尖蘸取AH26封闭剂；第4组：Resilon牙胶尖与RealSeal树脂封闭剂。使用0.06锥度、40号的牙胶尖主尖进行根管充填。所有根管样本在37℃、100%湿度条件下储存2周，以使封闭剂完全凝固。然后对根管样本进行力学测试，并记录数据，进行统计学分析。
采用单因素方差分析和事后检验（邓肯多重极差检验）来确定本研究中各测试组之间可能存在的统计学差异。第2组的抗折力显著大于对照组1（未充填）。第3组的抗折力显著大于第2组。第4组的抗折力显著大于第3组。在5%水平下，所有其他组间比较均无统计学意义。在本研究感兴趣的三组中，第4组的抗折力似乎最大。
与其他实验组相比，用Resilon充填根管可提高单根管离体牙的体外抗折性能。实验组抗折力均值由低到高依次为：根管预备但未充填、牙胶尖与氧化锌丁香酚封闭剂充填、牙胶尖与AH26封闭剂充填、Resilon充填。
Resilon是一种有望用于增强根管治疗后牙齿强度的材料。
