使用ProPex和数字信号处理技术确定乳牙的电子工作长度

Electronic working length determination in primary teeth by ProPex and Digital Signal Processing.

作者信息

Nelson-Filho Paulo, Lucisano Marcela Pacífico, Leonardo Mário Roberto, da Silva Raquel Assed Bezerra, da Silva Léa Assed Bezerra

机构信息

Department of Paediatric Clinic, Preventive and Community Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.

出版信息

Aust Endod J. 2010 Dec;36(3):105-8. doi: 10.1111/j.1747-4477.2009.00185.x. Epub 2010 Aug 23.

DOI:10.1111/j.1747-4477.2009.00185.x

PMID:21091842

Abstract

The purpose of this study was to evaluate the accuracy of electronic apex locators Digital Signal Processing (DSP) and ProPex, for root canal length determination in primary teeth. Fifteen primary molars (a total of 34 root canals) were divided into two groups: Group I - without physiological resorption (n = 16); and Group II - with physiological resorption (n = 18). The length of each canal was measured by introducing a file until its tip was visible and then it was retracted 1 mm. For electronic measurement, the devices were set to 1 mm short of the apical resorption. The data were analysed statistically using the intraclass correlation coefficient (ICC). Results showed that the ICC was high for both electronic apex locators in all situations - with (ICC: DSP = 0.82 and Propex = 0.89) or without resorption (ICC: DSP = 0.92 and Propex = 0.90). Both apex locators were extremely accurate in determining the working length in primary teeth, both with or without physiological resorption.

摘要

本研究的目的是评估数字信号处理（DSP）电子根尖定位仪和ProPex在确定乳牙根管长度方面的准确性。将15颗乳牙磨牙（共34个根管）分为两组：第一组——无生理性吸收（n = 16）；第二组——有生理性吸收（n = 18）。通过插入一根锉直到其尖端可见，然后将其退回1毫米来测量每个根管的长度。进行电子测量时，将设备设置为距根尖吸收处短1毫米。使用组内相关系数（ICC）对数据进行统计学分析。结果表明，在所有情况下，两种电子根尖定位仪的ICC都很高——有吸收（ICC：DSP = 0.82，Propex = 0.89）或无吸收（ICC：DSP = 0.92，Propex = 0.90）。两种根尖定位仪在确定乳牙工作长度方面都极其准确，无论有无生理性吸收。