GuttaFlow常温流动牙胶充填下颌第二磨牙C形根管密合性的评价

目的评价GuttaFlow常温流动牙胶用于下颌第二磨牙C形根管充填密合性。方法收集63颗具有C形根管的下颌第二磨牙,Hero shaper镍钛根管预备后,随机分为3组,分别采用GuttaFlow常温流动牙胶、EQ plus热牙胶和冷侧压充填。然后距根尖2、4、6、8 mm处垂直于牙体长轴片切牙齿,体视显微镜下观察剖面,并采集图像,利用图像分析软件计算根管充填物中牙胶面积的百分比(PGP),评价充填牙胶和根管壁密合性。结果 GuttaFlow常温流动牙胶在距根尖2、4 mm处充填密合性优于热牙胶和冷侧压。在6、8 mm处GuttaFlow与热牙胶的充填密合性无明显可见差别,但均好于冷侧压组。结论 GuttaFlow常温流动牙胶在用于充填下颌第二磨牙C形根管时,具有良好的密合性。

Evaluation of sealing ability of C-shaped root canal of mandibular second molars filled with GuttaFiow

Objective To evaluate the sealing ability of C-shaped root canal system of mandibular second molars filled with Gutta-Flow. Methods 63 mandibular second molars with C-shaped root canals were collected and then prepared with Hero shaper system. Then the teeth were randomly divided into 3 groups and the root canals were respectively filled with GuttaFlow, EQ plus thermoplasti- cized gutta percba and by cold lateral compaction technique. Then roots were sectioned at 2,4,6,8 mm from apical foramen. All sections were observed through stereomicroscope and the images were acquired. The percentage of gutta-percha-filled area （PGP） was calculated with Image Analysis Software and the sealing ability was evaluated. Results At the 2 mm,4 mm levels from apex, sealing ability of GuttaFlow was better than thermoplasticized gutta percha and cold lateral compaction. At the 6 mm,8 mm levels, there was no significant difference between GuttaFlow and thermoplasticized gutta percha,but both were better than cold lateral compaction group . Conclusions GuttaFlow has good sealing ability in filling C shaped root canals of mandibular second molars.