iRoot SP和iRoot BP Plus的根尖封闭能力的体外比较

In Vitro Comparison of Apical Sealing Ability of iRoot SP and iRoot BP Plus

目的:比较iRoot SP根充糊剂与iRoot BP Plus根尖倒充填材料的根尖封闭能力。方法:收集因正畸原因被拔除的102颗下颌前磨牙,随机分为5组:A组为AH Plus热牙胶垂直加压充填组;B组为iRoot SP全糊剂充填组;C组为iRoot SP单尖法充填组;D组为iRoot SP单尖法充填加iRoot BP Plus倒充填;E组为iRoot SP单尖法充填加MTA倒充填。使用墨水进行染色实验,使用立体显微镜和扫描电子显微镜检测微渗漏的最长长度。结果:在墨水染色实验中,A、B、C、D、E各组的微渗漏平均值分别为(0.65±0.73)mm、(0.33±0.35)mm、(0.32±0.20)mm、(0.24±0.32)mm和(0.23±0.31)mm。iRoot SP单尖法充填后有和无倒充填处理的根尖封闭能力无明显统计学差异(P=0.335)。iRoot SP全糊剂充填组中的微渗漏主要发生在糊剂内的裂隙或气泡中,倒充填iRoot BP Plus和MTA组的微渗漏主要发生在根管壁与倒充填材料之间。结论:iRoot SP根充糊剂与iRoot BP Plus根尖倒充填材料有着相似的根尖封闭能力。

Objective:To compare the apical sealing ability of iRoot SP bioceramic root-filling sealers with that of iRoot BP Plus root-end filling materials.Methods:A total of 102 mandibular premolar teeth were extracted and assigned to five groups:Group A:AH Plus using the warm gutta-percha vertical condensation(WGPVC)technique;Group B:iRoot SP sealer-only;Group C:iRoot SP sealer using the single-cone obturation technique(SCO);Group D:iRoot SP using SCO plus iRoot BP Plus as the root-end filling material;and Group E:iRoot SP+SCO+mineral trioxide aggregate(MTA)as the root-end filling material.Dye penetration experiments were performed using the ink,and the longest length of microleakage was detected with stereoscopic microscope and scanning electron microscope.Results:The mean values of microleakage in Groups A,B,C,D,and E were(0.65±0.73)mm,(0.33±0.35)mm,(0.32±0.20)mm,(0.24±0.32)mm,and(0.23±0.31)mm,respectively.In the iRoot SP sealer-only group,microleakage occurred mainly in the fissures or bubbles within the sealer,and in the iRoot BP Plus and MTA root-end filling groups,microleakage occurred mainly in the area between the canal wall and material.Conclusion:The apical sealing ability of iRoot SP was similar to that of iRoot BP Plus.