Naslov
Verification of physical models used for root canal measurement by impedance comparison

Autori
Marjanović, Tihomir ; Stare, Zoran ; Lacković, Igor

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
13th International Conference on Electrical Bioimpedance and the 8th Conference on Electrical Impedance Tomography : ICEBI 2007 ; IFMBE Proceedings ; Vol. 17 / Scharfetter, Hermann ; Merwa, Robert - Berlin : Heidelberg : New York : Springer, 2007, 715-718

ISBN
978-3-540-73840-4

Skup
International Conference on Electrical Bioimpedance and 8th Conference on Electrical Impedance Tomography (13 ; 2007)

Mjesto i datum
Graz, Austrija, 29.08.2007. - 02.09.2007

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
endodontics; electronic apex-locator; root canal measurement; electrical equivalent circuit of a tooth; tooth model verification

Sažetak
In the endodontic treatment of the root canal, one of the most important procedures is the root canal length determination. Apex-locators are commercial electronic devices used to determine canal length by measuring the electrical impedance. The verification of such instruments in-vivo is hard to perform because the only accurate way of measurement is by extracting the tooth and then measuring the canal length. For this reason, testing of apex-locators and their comparison as well as new measuring method evaluation are often performed by model-based in-vitro measurements on extracted teeth. In this paper we demonstrate that significant differences between electrical properties of the model and the vital tooth exist. Frequently used physical models in current studies consist of a tooth immersed either in saline solution or in freshly mixed alginate. In order to investigate the electrical properties of these physical models, we have measured the value of root canal impedance |Z| and the elements of two-element parallel equivalent circuit (Rp, Cp) in both physical models and compared the results with in-vivo root canal impedance measurements. We have shown that the results of the measurements of electrical impedance on the physical models significantly differ from in-vivo measurements. Therefore, due caution is required when drawing conclusions about apex-locator accuracy or performing method evaluation based on model measurements.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

Napomena
DOI: 10.1007/978-3-540-73841-1 ; ISBN (Online) 978-3-540-73841-1

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