锥形束CT评价3种根管充填方法的再治疗效率

Abstract

Abstract: Objective: To evaluate the retreatment efficiency of three root canal filling technique with Mtwo-R using cone beam computer tomography(CBCT) scan. Methods: 30 human mandibular premolar with a single straight root canal was prepared with MTwo.They were divided into three groups randomly, each group had 10 teeth, obturated with GuttaFlow, iRoot SP with single point and cold lateral condensation. Mtwo-R file was used to remove the filling material, the treatment time was recorded, CBCT scanning was performed before and after retreatment. Ultrasonic swings for 2 minutes, and then CBCT scan again. Volume changes of root canal filling materials after Mtwo-R treatment and ultrasonic swallowing were observed, and volume percentage of remaining root canal filling materials was calculated. Results:The operation time of GuttaFlow group < cold lateral condensation group <iRoot SP group, there was significant difference between each group(P>0.05).After Mtwo-R treatment, the volume percentage of residual material of GuttaFlow group <cold lateral condensation group <iRoot SP group.There was significant difference between GuttaFlow group and the other 2 groups(P<0.05), while there was no significant difference between the cold lateral condensation group and the iRoot SP group (P>0.05). After ultrasonic wash,the volume percentage of residual material of GuttaFlow group <iRoot SP group < cold lateral condensation group.The GuttaFlow group was significantly lower than the other 2 groups(P<0.05).There was no significant difference between the iRoot SP group and cold lateral condensation group (P>0.05).The volume percentage of the 3 groups of residual materials decreased after auxiliary ultrasonic wash were significantly decreased (P<0.05). Conclusion:Residual root canal filling materials were retained in all 3 groups.GuttaFlow was easier to be removed and iRoot SP was not easy to be removed.Additional ultrasonic wash could improve the clearance rate of iRoot SP.

Key words: CBCT, Root canal retreatment, Root canal filling technique, Ultrasonic

CLC Number:

R781.05

References 17

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Evaluation of retreatment efficiency of four kinds of root canal filling techniques with cone beam computer tomography

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