|Exposure duration||continuous for 2 h/day during 10 months|
|Setup||pair of Helmholtz coils with a diameter of 25 cm each and 225 turns of insulated copper wire with a diameter of 1 mm, placed horizontally inside a 130 cm x 65 cm x 80 cm Faraday cage for shielding; coils facing each other with a distance of 25 cm; rats placed in a 17 cm x 17 cm x 25 cm methacrylate cage inside the coil system|
|Sham exposure||A sham exposure was conducted.|
The calcium content in the rat teeth was significantly higher in both exposure groups when compared to the sham exposure. In the 500 µT-exposed group, the contents of zinc, magnesium and phosphorus were significantly increased compared to the 100 µT-exposed group and the sham exposed group. However, no significant differences in the content of zinc, magnesium, phosphorus were seen between the 100 µT-exposed group and the sham exposure.
The authors conclude that exposure to extremely low frequency magnetic field could influence the mineral content in rat teeth.