Proceedings of the KOSOMBE Conference (대한의용생체공학회:학술대회논문집)
- Volume 1997 Issue 11
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- Pages.399-402
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- 1997
Development of Frequency Dependent Type Apex-Locator Improvementation by Auto-calibration Using Impedance Difference
주파수 의존형 전자근관장측정기 개발 및 임피던스차를 이용한 자동보정에 의한 성능향상
- Nam, K.C. (Bioengineering Program, Yonsei University) ;
- Kim, S.C. (Bioengineering Program, Yonsei University) ;
- Kim, D.W. (Department of Biomedical Engineering, College of Medicine, Yonsei University) ;
- Lee, S.J. (Department of Conservative, College of Dentistry, Yonsei University)
- Published : 1997.11.28
Abstract
It is important to find a accurate root canal length or successful endodontic therapy. By X-ray method takes a long time and difficult in a curved canal. After developed electronic apex locator has allowed to measure the root canal length with easy, in a short time also in a curved canal. But most electronic apex locators have the disadvantage which is too short reading or sometimes the measurement itself becomes impossible if there are electrolytes in the canal. To overcome this drawback, impedance ratio method has been developed. In this study, we have developed frequency dependent electronic apex locator to minimize the interference of electrolytes. And based on that also some error in clinic use, we added the other method. Difference of two signals which are used in calculation of impedance ratio was can be represent the status of root canal fluid. As a result, using impedance ratio method and auto-calibration by voltage difference method can reduce the measurement error.
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