[三种不同电子根尖定位仪在体外不同条件下测定穿孔的准确性]

[Accuracy of three different electronic apex locators in determination of perforation with various conditions in vitro].

作者信息

Li Yue-Heng, Zhou Zhi, Zheng Yu-Qi, Gan Ning, Tang Yu-Ying, Li Rui, Chen Jiao

机构信息

Dept. of Endodontics, College of Stomatology, Chongqing Medical University, Chongqing 400015, China.

出版信息

Hua Xi Kou Qiang Yi Xue Za Zhi. 2011 Jun;29(3):272-5.

PMID:21776853

Abstract

OBJECTIVE

To evaluate accuracy of Propex, Raypex 5, Root ZX electronic apex locator in positions of the perforation with different irrigations in the root canal.

METHODS

Perforation lengths were measured with Propex, Raypex 5, 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, Raypex 5, 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, Raypex 5, and Root ZX electronic apex locators can detect perforation accurately.

摘要

目的

评估Propex、Raypex 5、Root ZX电子根尖定位仪在根管内不同冲洗液情况下穿孔位置的准确性。

方法

用超声ET40模拟制备穿孔后，将19颗拔除的人牙嵌入模型中，使用Propex、Raypex 5、Root ZX电子根尖定位仪测量穿孔长度，并与将牙齿嵌入模型前测量的实际根管长度进行比较。在不同的根管内容物情况下进行测量。结果：Propex、Raypex 5和Root ZX能够在根管内不同冲洗液情况下定位穿孔位置。同一电子根尖定位仪在不同冲洗液情况下实际根管穿孔长度与测量的根管穿孔长度之间的差异无统计学意义（P>0.05）。同时，三种电子根尖定位仪在相同冲洗液情况下实际根管穿孔长度与测量的根管穿孔长度之间的差异无统计学意义（P>0.05）。