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주파수의존형 전자근관장측정기의 개발과 정확도에 관한 연구 ; 전압차 자동보정형

Other Titles
 DEVELOPMENT OF NEW FREQUENCY-DEPENDENT TYPE APEX LOCTOR ; VOLTAGE DIFFERENCE COMPENSATING TYPE 
Authors
 이승종  ;  김덕원  ;  남기창 
Citation
 Journal of Korean Academy of Operative Dentistry (대한치과보존학회지), Vol.22(2) : 809-819, 1997 
Journal Title
 Journal of Korean Academy of Operative Dentistry (대한치과보존학회지) 
ISSN
 1225-0864 
Issue Date
1997
Keywords
apex locator ; frequency-dependent ; voltage difference
Abstract
The purpose of this study was to develop an accurate frequency-dependent type apex locator. To compensate the impedence differences of different canal contents, voltage differences were pre-measured and stored for saline, HOsb1/$2O_2$ 수식 이미지 and NaOCl. The circuit was adjusted to recognize the different voltages of each solution, thereby the machine could automatically compensate the voltage differences. In the process of this study, the following informations were observed. 1. Most stable apical reading was obtained at 500Hz and 10kHz. 2. There were no differences in accuracy among three different frequency types, sign wave, triangular wave and rectangular wave(p>0.05). 3. Before the compensation of voltage differences, saline, H2O2 and NaOCl showed different readings at the apex even with the frequency-type (p<0.05). 4. After compensating the voltage difference, the accuracy was enhanced from + 0.42 to +0.32 in H2O2(p<0.05), from -0.34 to -0.12 in NaOCl(p<0.05).
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Medical Engineering (의학공학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Conservative Dentistry (보존과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Deok Won(김덕원)
Lee, Seung Jong(이승종)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/177896
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