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Root canal length measurement in teeth with electrolyte compensation

Authors
 K.C. Nam  ;  S.C. Kim  ;  S.J. Lee  ;  Y.J. Kim  ;  N.G. Kim  ;  D.W. Kim 
Citation
 MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING, Vol.40(2) : 200-204, 2002 
Journal Title
MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING
ISSN
 0140-0118 
Issue Date
2002
MeSH
Dental Pulp Cavity/anatomy & histology* ; Electric Impedance ; Electrolytes ; Humans
Keywords
Tooth ; Root canal length ; Voltage difference ; Endodontic therapy ; Impedance ratio ; Clinical evaluation
Abstract
Electronic root canal length measurement devices have made it easier and faster to measure the root canal length of a tooth compared with the conventional radiographic method. Of these electronic apex locators, the frequency-dependent type features greater accuracy and convenience in operation. However, its accuracy is still influenced by the presence of blood and/or the various electrolytes used in root canal therapy. This study describes the development of a new frequency-dependent electronic apex locator featuring electrolyte compensation, utilising an impedance ratio and voltage difference technique to minimise the influence of electrolytes on the accuracy of root canal length measurement. The errors for distances from file tips to apical constrictions were determined in vivo with the device operating with electrolyte compensation. The measured lengths were compared with the true lengths of the extracted teeth determined using a microscope. The mean error was +0.14±0.27 mm, and 95.2% of the measurements were within the clinical tolerance of ±0.5 mm. It was also found that the degree of accuracy was not dependent on the size of the apical foramen (p=0.74).
Full Text
http://link.springer.com/article/10.1007/BF02348125
DOI
10.1007/BF02348125
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/22282913/144579
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