【摘要】 目的比较Propex、RaypexR5、Root ZX根尖定位仪在不同根管冲洗液中定位根管侧穿孔位置的准确性。方法选取19颗新鲜拔除的前磨牙,采用ET40超声工作尖破坏根管中下部根管壁,制备根管侧穿孔。使用Propex、RaypexR5、Root ZX根尖定位仪定位穿孔位置,比较3种根尖定位仪在不同根管冲洗液中测量准确性的差异,并与实际长度进行比较。结果 Propex、RaypexR5、Root ZX在不同根管内容物时均能定位根管穿孔位置;同一种根尖定位仪在不同根管内容物时定位穿孔测量值与实际值的差值之间的差异均无统计学意义(P>0.05);相同根管内容物时,3种根尖定位仪定位穿孔测量值与实际值的差值之间的差异均无统计学意义(P>0.05)。结论 Propex、RaypexR5、RootZX均能较好地定位根管穿孔位置。更多还原

【Abstract】 Objective To evaluate accuracy of Propex,Raypex5,Root ZX electronic apex locator in positions of the perforation with different irrigations in the root canal.Methods Perforation lengths were measured with Propex,Raypex5,Root ZX electronic apex locators in 19 extracted human teeth embedded in model after simulate perforation preparation by ultrasonic ET40 and compared with the actual canal length measurements taken before embedding the teeth in model.Measurements were taken with the different canal contents.Results Propex,Raypex5,and Root ZX could locate the positions of the perforation with different irrigations in the root canal.The differences between actual root canal perforation length and measured root canal perforation length of same electronic apex locators in different irrigations were no statistically significant(P>0.05).Meanwhile,the differences between actual root canal perforation length and measured root canal perforation length of three kinds of electronic apex locators in same irrigations were not statistically significant(P>0.05).Conclusion Propex,Raypex5,and Root ZX electronic apex locators can detect perforation accurately.更多还原