Naslov
The influence of excitation current on the root canal length measurement

Autori
Protulipac, Tihomir ; Stare, Zoran

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

Izvornik
Proc. of the International Federation for Medical & Biological Engineering, Vol. 3, Part 1 / Hutten, Helmut ; Krosl, Peter - Beč : International Federation of Medical and Biological Engineering (IFMBE), 2002, 140-141

Skup
2nd European Medical and Biological Engineering Conference EMBEC&#8217 ; ; 02

Mjesto i datum
Beč, Austrija, 04.12.2002. - 08.12.2002

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
apex location; current density; endodontics; bioimpedance; electrodes

Sažetak
Root canal length measurement was simulated by placing the tip of the active electrode (Kerr file or Miller-Donalds needle) on the gingiva and measuring the impedance between the active electrode and large area electrode fixed on the lip. The impedance was measured for the series of voltage excitation amplitudes at the frequencies in range 20 Hz&#8211 ; ; 1 MHz. It has been shown that measured values of impedance tend to decline when current density higher than critical one is applied. This matches with the same measurements performed on the electrode/electrolyte interface, but critical values of current density are about 10 times lower for measurement in electrolyte. In the construction of electronic apex locator it is important to ensure that current density is lower than critical one for every needle used.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA