不同根充材料对于根尖封闭性能的纵剖面研究  

Vertical Profile Study on Apical Sealing Ability of Three Kinds of Root Canal Filling Materials

作　　者：伍廷芸[1] 朱友家[2] 阮琼 李冰峰 

机构地区：[1]荆楚理工学院医学院,湖北荆门448000 [2]武汉大学中南医院口腔医学中心 [3]荆门市康复医院口腔科

出　　处：《口腔医学研究》2013年第1期85-88,共4页Journal of Oral Science Research

基　　金：湖北荆楚理工学院2010年校级科研项目(编号:ZR201013)

摘　　要：目的:评价3种根管充填糊剂的根管封闭能力,分析其影响因素。方法:收集新鲜拔除的完整单根管下颌第一前磨牙60颗,随即分为A、B、C三组,每组20颗牙,分别用氧化锌丁香油糊剂、Vltapex糊剂、AH-Plus糊剂加牙胶尖以侧压法进行根管充填,采用染料渗入法测染料渗入距离,并通过扫描电镜观察根尖1/3、根中1/3、根颈1/3中根管壁与糊剂之间的结合状态。结果:扫描电镜下3类糊剂在根颈1/3与根管壁的粘结最紧密,在根尖1/3与根管壁的粘结最疏松。其中AH-Plus组可见材料呈均质状分布,与管壁粘结最为紧密。在根尖1/3处AH-Plus组(2.11±0.22)μm的微缝隙宽度明显低于氧化锌丁香油糊剂(8.63±0.25)μm和Vitapex糊剂(7.58±5.62)μm(P<0.05)。3种根管充填材料的染料渗透距离中,AH-Plus组的微渗漏值(0.98±0.58)mm明显小于氧化锌丁香油糊剂(2.32±0.55)mm和Vitapex糊剂(2.11±0.67)mm(P<0.05)。结论:AH-Plus糊剂对于根管充填特别是根尖有很好的密合性,能有效防止根尖微渗漏现象的发生。Objective： To estimate the blocking efficacy of 3 kinds of root canal filling materials and to analyze the influence factors. Methods： 60 freshly extracted mandibular first premolars with single root were collected. The samples were randomly divided into three groups. The teeth of group A B C were respectively filled with guttapercha point of the same kind plus zinc oxide-eugenol（ZOE） paste, Vitapex paste and AH-Plus paste in lateral pressure way. Apical micro-leakage was determined using dye infiltration and the binding state between filling materials and the root canal wall in one-third area of root apical, root middle and root cervical was measured under a scanning electron microscope（SEM）. Results： Under SEM, three kinds of root canal filling materials were most closely connected with root canal wall in one-third area of root cervical, while they were most loosely connected in one-third area of root apical. The binding state of AH-Plus paste group was obviously better than that of the other 2 groups. In one-third area of root apical, the micro-chink of AH-Plus paste group（2.11±0.22μm） was significantly lower than that of ZOE paste group （8.63 ± 0.25μm） and that of Vitapex paste group （ 7.58 ± 5.62μm） （P 〈0.05）. In terms of the dye infiltration distance of the three kinds of filling materials, the micro-leakage value of AH-Plus paste group（0. 98± 0. 58mm） was obviously lower than that of that of ZOE paste group（2. 32 ±0. 55mm） and that of Vitapex paste group（2.11±0.67mm） （P〈0.05）. Conclusion： AH-Plus paste, used as root canal filling material, showed better sealing ability, and it could effectively prevent the occurrence of apical microleakage.

关 键 词：根管充填材料 微渗漏 扫描电镜 

分 类 号：R781.05[医药卫生—口腔医学]