Effect of extremely low frequency magnetic field on enamel microhardness in rats

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ABSTRACT

Aim

The potential effects on human health of extremely low frequency magnetic field (ELF-MF) are of considerable
concern. In the present study, it was investigated the effect of long term ELF-MF exposure on microhardness of rat teeth.

Methods

Thirty male Sprague-Dawley rats were divided into three groups. The first and second
experimental groups (n=10) were exposed to 100 T and 500 T ELF-MF during 10 months, 2 hours a day
respectively. For the control group, nothing was applied to the rats and they completed their life cycle in the cage during the
study period. After ELF-MF exposure, microhardness of enamel surface was determined for each group.

Results

The
decrease in microhardness in the second experimental group was found to be statistically significant compared to the
control group (P <0.05). However, no statistical difference was found between the first and second experimental groups (P >0.05).

Conclusion

From the results it can be concluded that 500 T level of magnetic field strengths may have a
certain negative effect on enamel mineralisation. Further investigations are necessary to analyse the effect of ELF-MF on
teeth.

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