硅基根管封闭剂GuttaFlow Bioseal充填椭圆形根管的根尖封闭效果

Apical sealing of GuttaFlow Bioseal in oval-root canals

背景:椭圆形根管的严密充填成为困扰临床医生的一大难题,生物活性封闭剂GuttaFlow Bioseal具有良好的理化特性和生物学性能,其充填椭圆形根管的相关研究尚未见报道。目的:评估生物活性封闭剂GuttaFlow Bioseal充填椭圆形根管的根尖封闭效果。方法:90颗离体椭圆形单根管下颌前磨牙于牙颈部截冠保留牙根14 mm,采用机用镍钛锉预备根管至F3,随机数字表法分为4组:A组(n=20)以AH-plus+热牙胶技术充填,B组(n=20)以iRootSP+单尖技术充填,C组(n=20)以GuttaFlow2+单尖技术充填,D组(n=20)以GuttaFlow Bioseal+单尖技术充填,E组(n=5)为阳性对照组,F组(n=5)为阴性对照组。采用染料渗透法及透明牙技术观察各组根尖微渗漏情况及侧副管充填情况。结果与结论:(1)A-D组样本显示出不同程度的染料渗漏,阳性对照组可见染料渗入根管全长,阴性对照组未见染料渗入根管内,B组染料渗入长度大于A、C、D组(P<0.05),A、C、D组间染料渗入长度比较差异无显著性意义(P>0.05);(2)A-D组侧副根管的充填率分别是60%,30%,40%,50%,4组比较差异无显著性意义(P>0.05);A组超充率显著低于B、C、D组(P<0.05),B、C、D组超充率比较差异无显著性意义(P>0.05);(3)结果表明,GuttaFlow Bioseal封闭剂在椭圆形根管中具有较好的根尖封闭性和侧副管充填效果,充填效率高,但易发生超充。

BACKGROUND:Tight obturation of oval root canals has become a major problem for clinicians.GuttaFlow Bioseal has good physical and chemical characteristics and biological properties,and its obturation of oval root canals has not been reported.OBJECTIVE:To evaluate the apical sealing ability of GuttaFlow Bioseal root canal sealer in oval root canals.METHODS:Ninety mandibular premolars with single oval-root canal were decoronated to obtain 14 mm root segments.The root canals were instrumented using Protaper files to F3.Roots were randomly divided into four groups.The root canals of group A(n=20)were obturated with AH-plus and the continuous wave of condensation technique.The root canals of group B(n=20)were obturated with iRoot SP and single gutta-percha cone.The root canals of group C(n=20)were obturated with GuttaFlow 2 and single gutta-percha cone.The root canals of group D(n=20)were obturated with GuttaFlow Bioseal and single guttapercha cone.The group E(n=5)and group F(n=5)were served as the positive and negative control groups,respectively.The apical leakage and the filling of the lateral accessory canals were evaluated by dye penetration method and transparent teeth technique in each group.RESULTS AND CONCLUSION:(1)There were significant differences in the length of leakage among groups A-D.The dye penetrated the entire length of the root canal in the positive control group.The dye did not penetrate into the root canal in the negative control group.The dye penetration length of group B was longer than that of groups A,C,and D(P<0.05).The length of dye penetration among groups A,C,and D was not significantly different(P>0.05).(2)The filling rate of lateral accessory root canals was not statistically significant among the group A(60%),group B(30%),group C(40%),and group D(50%)(P>0.05).The overfilling rate in group A was significantly lower than that in groups B,C,and D(P<0.05).There was no significant difference in the overfilling rate among groups B,C,and D(P>0.05).(3)These results demonstrate that GuttaFlow Bioseal has good apical sealing ability and lateral accessory canal filling effect on oval root canals,with high filling efficiency,but with the disadvantage of high overfilling rate.