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The Effect of Pulsed Electromagnetic Fields on Microleakage of Amalgam Restorations: An in Vitro Study

Author(s):
Maryam PaknahadMaryam Paknahad2, Shoaleh ShahidiShoaleh Shahidi3, Seyed Mohammad Javad MortazaviSeyed Mohammad Javad Mortazavi5, Ghazal MortazaviGhazal Mortazavi4, Mahdi Saeedi MoghadamMahdi Saeedi Moghadam4, Ali Dehghani NazhvaniAli Dehghani NazhvaniAli Dehghani Nazhvani ORCID6,*
2Department of Oral and Maxillofacial Radiology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, IR Iran
3Biomaterial Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, IR Iran
5Medical Physics and Medical Engineering Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, IR Iran
4Ionizing and Non-Ionizing Radiation Protection Research Center (INIRPRC), Shiraz University of Medical Sciences, Shiraz, IR Iran
6Oral and Maxillofacial Pathology Department, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, IR Iran


Shiraz E-Medical Journal:Vol. 17, issue 2; 32329
Published online:Jan 22, 2016
Article type:Research Article
Received:Aug 10, 2015
Accepted:Jan 02, 2016
How to Cite:Maryam PaknahadShoaleh ShahidiSeyed Mohammad Javad MortazaviGhazal MortazaviMahdi Saeedi MoghadamAli Dehghani Nazhvaniet al.The Effect of Pulsed Electromagnetic Fields on Microleakage of Amalgam Restorations: An in Vitro Study.Shiraz E-Med J.17(2):32329.https://doi.org/10.17795/semj32329.

Abstract

Background:

Previous studies have reported an increase in the mercury release from dental amalgam restorations, following exposure to electromagnetic fields generated by sources such as mobile phones and magnetic resonance imaging (MRI). It has also been shown that MRI increases microleakage of amalgam restorations. In this study, Helmholtz coils are used for generating pulsed electromagnetic fields (PEMF).

Objectives:

The purpose of this study was to evaluate the effect of PEMFs on microleakage of amalgam restorations, using a pair of Helmholtz coils.

Patients and Methods:

Standardized class V cavities were prepared on the facial surfaces of 46 non-carious extracted human premolars. Then, the samples were randomly divided into experimental and control groups, each containing 23 teeth. The experimental group was exposed to the uniform magnetic fields generated by a pair helmholtz coils. The magnetic field strength at the central point of the two coils was 0.1 mT. All specimens were placed in 2% basic fuchsin solution. Then the teeth were sectioned, examined under a stereomicroscope, and scored for microleakage according to the degree of dye penetration.

Results:

There was no significant difference between the two groups regarding the microleakage score.

Conclusions:

The results of the present study suggest that PEMF exposure does not have adverse effects on microleakage of amalgam restorations.

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