Nazari Moghaddam Kiumars, Nazari Shahrzad, Shakeri Leila, Honardar Kiamars, Mirmotalebi Farshid
Department of Endodontics, Dental School, Shahed University of Medical Sciences, Tehran, Iran.
Iran Endod J. 2010 Winter;5(1):23-6. Epub 2010 Feb 20.
The aim of this study was to evaluate the accuracy of two electronic apex locators (Smarpex and NovApex) in detecting apical perforation.
After access cavity preparations, the working length was determined by the first examiner before and after perforation with a stereomicroscope by introducing a K-file size 10 into the canal and size 25 K-file up to the perforation site, respectively. The specimens were embedded in a 17-well plastic box containing alginate. The root canals were irrigated with chlorhexidine 0.2% (CHX) through a 27-gauge needle. Two examiners measured the root canal length twice and the mean value was calculated. The data were analyzed using Kolmogorov-Smirnov and ANOVA tests.
The results obtained with each Electronic Apex Locator were compared with the corresponding control length. The statistical analysis showed reliable accuracies in detecting the perforation site for the two experimental electronic apex locators (60% and 80% for NovApex and Smarpex, respectively).
Although no significant difference was shown between Smarpex and NovApex, these results suggest that electronic apex locators can effectively and reproducibly detect root canal perforations.
本研究的目的是评估两种电子根尖定位仪(Smarpex和NovApex)检测根尖穿孔的准确性。
开髓后,由第一位检查者分别在穿孔前后通过立体显微镜确定工作长度,穿孔前将10号K锉插入根管,穿孔后将25号K锉插入至穿孔部位。标本嵌入含有藻酸盐的17孔塑料盒中。通过27号针头用0.2%洗必泰(CHX)冲洗根管。两位检查者测量根管长度两次并计算平均值。数据采用Kolmogorov-Smirnov检验和方差分析进行分析。
将每种电子根尖定位仪获得的结果与相应的对照长度进行比较。统计分析表明,两种实验性电子根尖定位仪在检测穿孔部位方面具有可靠的准确性(NovApex和Smarpex分别为60%和80%)。
虽然Smarpex和NovApex之间未显示出显著差异,但这些结果表明电子根尖定位仪能够有效且可重复地检测根管穿孔。