Fisher Matthew A, Berzins David W, Bahcall James K
Department of Endodontics, Marquette University, School of Dentistry, Milwaukee, Wisconsin, USA.
J Endod. 2007 Jul;33(7):856-8. doi: 10.1016/j.joen.2007.02.011. Epub 2007 Apr 16.
The purpose of this in vitro study was to compare the bond strength of various obturation materials to root canal dentin by using a push-out test design. Twenty-five single-rooted extracted human teeth were used in this study. The crowns were removed, and root canal instrumentation was completed by using Endogel-coated 0.06 EndoSequence rotary files (Brasseler, Savannah, GA) and appropriate irrigation with 5.25% NaOCl and a final rinse with 17% EDTA. After instrumentation, the roots were randomly divided into five single-matched cone obturation groups (n = 5 roots/group), as follows: group 1, gutta percha with Kerr EWT (Kerr Corp, Romulus, MI); group 2, gutta percha with AH Plus (Dentsply, DeTrey, Germany); group 3, Resilon (Pentron Clinical Technologies, Wallingford, CT) and Epiphany (Pentron); group 4, Activ GP (Brasseler) obturation system; and group 5, EndoREZ obturation system (Ultradent, South Jordan, UT). The obturated roots were cut perpendicular to the long access to create 1-mm thick slices from the apical, middle, and coronal thirds. The bond strength was measured for each test slice with a push-out testing machine. Statistical analysis was completed by using a two-way analysis of variance and the post hoc Tukeys test with significance set at p < 0.05. Group 2 showed a significantly (p < 0.05) greater bond strength compared with all other groups. Also, groups 1 and 4 had significantly (p < 0.05) higher bond strengths compared with groups 3 and 5.
本体外研究的目的是通过推出试验设计比较各种根管充填材料与根管牙本质之间的粘结强度。本研究使用了25颗单根拔除的人牙。去除牙冠，使用涂有Endogel的0.06 EndoSequence旋转锉（Brasseler，佐治亚州萨凡纳）完成根管预备，并适当用5.25%次氯酸钠冲洗，最后用17%乙二胺四乙酸冲洗。预备后，将牙根随机分为五个单匹配牙胶尖充填组（每组n = 5个牙根），如下：第1组，牙胶尖与Kerr EWT（Kerr公司，密歇根州罗穆卢斯）；第2组，牙胶尖与AH Plus（登士柏，德国德特雷）；第3组，Resilon（Pentron临床技术公司，康涅狄格州沃灵福德）和Epiphany（Pentron）；第4组，Activ GP（Brasseler）充填系统；第5组，EndoREZ充填系统（Ultradent，犹他州南乔丹）。将充填后的牙根垂直于长轴切割，从根尖、中部和冠部分别制作1毫米厚的切片。使用推出试验机测量每个测试切片的粘结强度。采用双向方差分析和事后Tukey检验进行统计分析，显著性设定为p < 0.05。与所有其他组相比，第2组显示出显著更高的粘结强度（p < 0.05）。此外，第1组和第4组的粘结强度显著高于第3组和第5组（p < 0.05）。
