PDF(Pubmed)
Abstract：
UNASSIGNED: Accurate working length (WL) determination is essential for successful root canal therapy.
UNASSIGNED: The aim of this study was to compare the difference between two different techniques in locating minor constriction using fifth-generation electronic apex locator.
UNASSIGNED: A detailed protocol explaining the procedures of the study was submitted to the institutional ethics committee.
UNASSIGNED: Forty extracted human permanent canine teeth were selected. WL was measured three times for each sample by three different examiners for both the conventional and experimental techniques at different time intervals. Interexaminers were blinded to their measurements, and the person who analyzed mean value was also blinded with techniques. Finally, radiographic working length was obtained using 15 size K-file. A size 20 K-file was cemented into the measured position with glass ionomer cement. Each tooth was viewed under a stereomicroscope at ×40 magnification. The distance from the file tip to the root apex was measured and calibrated to the nearest tenth of a millimeter.
UNASSIGNED: Using Stata statistical software (Version 17, Statacorp, College Station, Texas, USA). The agreement between raters and techniques was determined using intraclass correlation coefficient \"ICC\" and Bland-Altman plot.
UNASSIGNED: The \"experimental method\" (0.95, 95%) showed better agreement between the raters in comparison with the \"conventional method\" (0.93, 95%).
UNASSIGNED: The experimental technique showed perfect agreement between examiners in locating the minor constriction of the apical foramen.
UNASSIGNED: The aim of this study was to compare the difference between two different techniques in locating minor constriction using fifth-generation electronic apex locator.
UNASSIGNED: A detailed protocol explaining the procedures of the study was submitted to the institutional ethics committee.
UNASSIGNED: Forty extracted human permanent canine teeth were selected. WL was measured three times for each sample by three different examiners for both the conventional and experimental techniques at different time intervals. Interexaminers were blinded to their measurements, and the person who analyzed mean value was also blinded with techniques. Finally, radiographic working length was obtained using 15 size K-file. A size 20 K-file was cemented into the measured position with glass ionomer cement. Each tooth was viewed under a stereomicroscope at ×40 magnification. The distance from the file tip to the root apex was measured and calibrated to the nearest tenth of a millimeter.
UNASSIGNED: Using Stata statistical software (Version 17, Statacorp, College Station, Texas, USA). The agreement between raters and techniques was determined using intraclass correlation coefficient \"ICC\" and Bland-Altman plot.
UNASSIGNED: The \"experimental method\" (0.95, 95%) showed better agreement between the raters in comparison with the \"conventional method\" (0.93, 95%).
UNASSIGNED: The experimental technique showed perfect agreement between examiners in locating the minor constriction of the apical foramen.
摘要：
■准确的工作长度（WL）确定对于成功的根管治疗至关重要。
■这项研究的目的是比较两种不同技术在使用第五代电子顶点定位器定位微小收缩时的差异。
■解释研究程序的详细方案已提交给机构伦理委员会。
■选择了40颗提取的人类恒牙。对于常规和实验技术,三个不同的检查者在不同的时间间隔对每个样品测量三次WL。感兴趣的人对他们的测量视而不见，分析平均值的人也被技术蒙蔽了。最后,射线照相工作长度是使用15大小的K文件获得的。用玻璃离聚物粘固剂将尺寸为20K的文件粘合到测量位置。在立体显微镜下以40倍的放大率观察每颗牙齿。测量从刀尖到根尖的距离并校准到最接近的十分之一毫米。
■使用Stata统计软件(版本17，Statacorp，学院站,德州,美国）。使用组内相关系数“ICC”和Bland-Altman图确定评估者与技术之间的一致性。
■与“常规方法”（0.93，95％）相比，“实验方法”（0.95，95％）在评估者之间显示出更好的一致性。
■实验技术表明，检查者在定位根尖孔的微小收缩方面具有完美的一致性。
■这项研究的目的是比较两种不同技术在使用第五代电子顶点定位器定位微小收缩时的差异。
■解释研究程序的详细方案已提交给机构伦理委员会。
■选择了40颗提取的人类恒牙。对于常规和实验技术,三个不同的检查者在不同的时间间隔对每个样品测量三次WL。感兴趣的人对他们的测量视而不见，分析平均值的人也被技术蒙蔽了。最后,射线照相工作长度是使用15大小的K文件获得的。用玻璃离聚物粘固剂将尺寸为20K的文件粘合到测量位置。在立体显微镜下以40倍的放大率观察每颗牙齿。测量从刀尖到根尖的距离并校准到最接近的十分之一毫米。
■使用Stata统计软件(版本17，Statacorp，学院站,德州,美国）。使用组内相关系数“ICC”和Bland-Altman图确定评估者与技术之间的一致性。
■与“常规方法”（0.93，95％）相比，“实验方法”（0.95，95％）在评估者之间显示出更好的一致性。
■实验技术表明，检查者在定位根尖孔的微小收缩方面具有完美的一致性。
