Impedance characteristics of mimic human tooth root canal and its equivalent circuit model
Impedance characteristics of mimic human tooth root canal and its equivalent circuit model
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DOI：
10.1149/1.2844440
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发表时间：
2008-01-01
影响因子：
3.9
通讯作者：
Lin, Chun-Pin
中科院分区：
文献类型：
--
作者：
Huang, Jui-Hsiung;Yen, Shi-Chern;Lin, Chun-Pin
本研究利用由圆柱形小管和5%琼脂组成的模拟系统，研究了人牙根管的复杂阻抗特性。用频率响应分析仪和充有蒸馏水或生理盐水的小管测量离体根管的阻抗。提出了该生物电系统的等效电路模型，与实验结果吻合较好。基于所提出的等效电路模型，可以合理地解释实验结果，并可以清楚地了解电解质填充管道的效果。修正阻抗商（Q）和阻抗商的变化率（S-Q）被作为心尖的有用指标。不同的阻抗行为已被确定从Q值在下顶点和上顶点区域，分别。所有电解质的S-Q在顶点位置以及在顶点上区域均< 0.15，并且可用于消除电解质电导率的影响。本研究阐明了电解系统复杂的电学机理，为牙髓治疗的临床应用提供了新的思路。(C)2008年电化学学会。
This investigation examined the complicated impedance characteristics of the human tooth root canal using a mimic system that comprised a cylindrical tubule and 5% agar-gel. The in vitro impedance measurements of root canals were made using a frequency response analyzer and a tubule filled with distilled water or normal saline. An equivalent circuit model of this bioelectric system was proposed; it closely corresponds to the experimental results. On the basis of the proposed equivalent circuit model, the experimental results can be explained reasonably and the effect of the filling of the canal with the electrolytes can be clearly understood. The modified impedance quotient (Q) and the variation ratio of the impedance quotient (S-Q) are taken as the useful indices of the apex. Different impedance behaviors have been identified from Q values in under-apex and over-apex regions, respectively. The S-Q was < 0.15 at the apex location as well as in the overapex region for all electrolytes and could be used to eliminate the effect of the electrolytic conductivity. This study elucidates the complicated electric mechanisms of electrolytic systems and improves clinical applications in the endodontic treatment. (C) 2008 The Electrochemical Society.