PMID: 9550026Jun 1, 1997Paper

Electrical impedance measurements of root canal length

Endodontics & Dental Traumatology
N Meredith, K Gulabivala

Abstract

Electronic methods are now widely used during endodontic treatment for the assessment of root canal length. These commonly measure the electrical resistance or impedance between the root canal and the buccal mucosa. A number of studies have been undertaken to determine the accuracy of commercially available instruments. The aims of this investigation were to determine the electrical impedance characteristics of the root canal and periapical tissues in vivo, measure the changes relative to the distance of an endodontic instrument from the apical constriction and propose an equivalent circuit modelling the periapical tissues. The length of the root canals of 20 previously untreated teeth were determined using radiographic and electronic methods. Minimal canal preparation was carried out and measurements were made with a size 10 K-Flex file. A microprocessor-controlled LCR analyser was used to measure the electrical impedance characteristics of each root canal. The instrument measured the series and parallel resistive (RS, RP) and capacitance (CS, CP) component of the tissues at two test frequencies, 100 Hz and 1 kHz. Measurements were made for each root canal when the diagnostic file was placed at the apical constriction and repe...Continue Reading

References

Jan 1, 1991·International Endodontic Journal·A K OlsonJ Luciano
Sep 1, 1990·Journal of Endodontics·A F FouadR A Olson
Jan 1, 1990·Journal of Endodontics·N J McDonald, E J Hovland
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Apr 1, 1995·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·R K Arora, K Gulabivala

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Citations

Aug 29, 2006·Medical & Biological Engineering & Computing·Maja KovacevicDragica Bobinac
Feb 23, 2013·British Dental Journal·R AliB Nattress
Dec 21, 2004·International Endodontic Journal·M Venturi, L Breschi
Sep 8, 2010·Biomedical Engineering Online·Marcos V H RamboCarlos A S Ramos
Jul 22, 2010·Journal of Endodontics·Jiangfeng DingHao Chen
Mar 22, 2000·Journal of Endodontics·R WeigerC Löst
Feb 21, 2007·International Endodontic Journal·M Venturi, L Breschi
Jul 29, 2006·International Endodontic Journal·M H NekoofarP M H Dummer
Feb 4, 2006·International Endodontic Journal·W FanM W Fan
Sep 30, 2008·International Endodontic Journal·A Al-bulushiK Gulabivala
Feb 11, 2011·International Endodontic Journal·S M ArdeshnaK Gulabivala
Jul 8, 2008·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·Jung-A Kang, Sung Kyo Kim
Feb 16, 2016·Restorative Dentistry & Endodontics·Paras Mull GehlotMysore Krishnaswamy Manjunath
May 20, 2015·Restorative Dentistry & Endodontics·Pil-Jong KimByeong-Hoon Cho

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