The mineral content in teeth is associated with dental caries.
Rats were divided in 8 groups (n=8 per group): 1.) 60 mg manganese per kg body weight + exposure, 2.) 15 mg manganese per kg body weight + exposure, 3.) 3.75 mg manganese per kg body weight + exposure, 4.) exposure, 5.) 60 mg manganese per kg body weight, 6.) 15 mg manganese per kg body weight, 7.) 3.75 mg manganese per kg body weight and 8.) cage control group.
Manganese application and exposure were repeated daily for 45 days.
Exposure duration: continuous 4 h/day during 45 days
rats were treated in the following eight groups: i) exposure to 60 mg/kg Mn + exposure to EMF ii) exposure to 15 mg/kg Mn + exposure to EMF iii) exposure to 3.75 mg/kg Mn + exposure to EMF iv) exposure to EMF only v) exposure to 60 mg/kg Mn vi) exposure to 15 mg/kg Mn vii) exposure to 3.75 mg/kg Mn viii) control group
|Exposure duration||continuous 4 h/day during 45 days|
|magnetic flux density||1 mT||-||-||-||-|
Rats receiving a manganese application and/or were exposed to a magnetic field had significantly increased levels of zinc and magnesium and signifcantly decreased levels of calcium and phosphorus in comparison to the cage control group.
The authors conclude that application of manganese and/or exposure to extremely low frequency magnetic fields could influence the mineral content of rat teeth, which could lead to an increased risk of dental caries.