Calculation of the Currents Generated in Dental Tissues by the Application of an External Electric Field

Sandrolini, Leonardo

doi:10.2528/pierl13070908

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…Instead, cortical bone data were used in the database of dielectric properties provided by IT'IS. Therefore, in this study, coupled analyses were performed by setting three values of tooth conductivity, σ t = 0.001, 0.01, and 0.1 S/m, based on literature data [IT'IS; Krizaj et al, 2004;Sandrolini, 2013]. For an initial temperature of 36°C and Δt = 1 ms, a voltage of 60 V rms (500 kHz) was applied across the electrodes for 0.1 s. Fig.…”

Section: Tooth Model and Numerical Conditionsmentioning

confidence: 99%

Evaluation of Temperature Increase From Joule Heat in Numerical Tooth Model by Applying 500 kHz Current for Apical Periodontitis Treatment—Effect of Applied Voltage and Tooth Conductivity

Tarao

Akutagawa

Emoto

et al. 2021

Bioelectromagnetics

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For apical periodontitis treatments, a new method with the insertion of an electrode into the root canal of a tooth and application of a current at 500 kHz to sterilize the area by Joule heat has attracted attention. However, few studies have quantified the temperature increase in the root canal. This study aimed to investigate the basic characteristics of the temperature increase in a simple and standard tooth model when energizing a current at 500 kHz to the numerical tooth model with typical electrical and physical properties. We developed a numerical model of a standard tooth (dentin) and periodontal tissues consisting of an alveolar bone, cortical bone, and gingiva, and physiological saline in a root canal and calculated the temperature increase inside the numerical model by a coupled analysis of current and heat when a voltage was applied across the electrodes. The calculated results for the different applied voltages showed a temperature increase at the apical portion of the root canal, which increased with the applied voltage even for the same total supplied energy. The temperature increase occurred at the apical portion of the root canal as the tooth conductivity decreased. When the tooth conductivity was high, a current passed through the dentin, which led to a decrease in the temperature at the apical portion of the root canal. However, a chemical solution with a higher conductivity in the root canal tended to increase the temperature at the apical portion of the root canal, regardless of the tooth conductivity. More efficient approaches for increasing the spatial and temporal temperature for the tooth model target are needed.

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Section: Tooth Model and Numerical Conditionsmentioning

confidence: 99%

Evaluation of Temperature Increase From Joule Heat in Numerical Tooth Model by Applying 500 kHz Current for Apical Periodontitis Treatment—Effect of Applied Voltage and Tooth Conductivity

Tarao

Akutagawa

Emoto

et al. 2021

Bioelectromagnetics

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Iontophoresis application for drug delivery in high resistivity membranes: nails and teeth

Andrade

Miranda

Cunha-Filho

et al. 2022

Drug Deliv. and Transl. Res.

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Dependence of electrodontometry indicators on the configuration of the root canal

et al. 2022

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Aim. To assess the dependence of electrodontometry indicators on the configuration of the root canal and to determine the value of the resultant action of the current at which patients have a response to electrodontometry.Materials and methods. The research consisted in the creation of computer models of teeth and their analysis by the finite element method in the COMSOL Multiphysics program. The removed tooth 2.2 was chosen as a prototype for 3D computer models. The tooth was dissected into fragments 2 millimeters thick, from which the geometric parameters of hard tissues and the position of the root canal were removed. Based on these data, a 3D model of the tooth was built. Based on the 2.2 tooth model, 5 models of the same tooth were constructed, simulating the stages of its root formation.Results. In all models, with an increase in the channel width in the apex area from 0.3 mm to 2.55 mm, the current density in this area decreased from 26.92 A/m2 to 0.63 A/m2. The maximum current density in the models was recorded in the narrowest part of the root canal and ranged from 26.01 A/m2 to 26.75 A/m2.Conclusions. The strength of the diagnostic current that causes a response in patients during electrodontometry depends on the configuration of the root canal, namely, on the cross–sectional area in the narrowest part of the root canal, where the maximum current density is recorded. The current density at which patients have a response to electrodontometry is 26-27 A/m2.

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Calculation of the Currents Generated in Dental Tissues by the Application of an External Electric Field

Cited by 3 publications

References 11 publications

Evaluation of Temperature Increase From Joule Heat in Numerical Tooth Model by Applying 500 kHz Current for Apical Periodontitis Treatment—Effect of Applied Voltage and Tooth Conductivity

Evaluation of Temperature Increase From Joule Heat in Numerical Tooth Model by Applying 500 kHz Current for Apical Periodontitis Treatment—Effect of Applied Voltage and Tooth Conductivity

Iontophoresis application for drug delivery in high resistivity membranes: nails and teeth

Dependence of electrodontometry indicators on the configuration of the root canal

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