To examine the influence of an exposure to a 900 MHz electromagnetic field on the bone fracture healing in rats.
30 rats were divided into two groups (n=15 per group): a control group and an exposed group. The control group was kept under the same experimental conditions as the experimental group, but without exposure to an electromagnetic field (remark EMF-Portal: not clear if control group was sham exposed). The right tibial bones of the rats were broken by finger pressure. 5 rats from the exposure group and 3 rats from the control group were excluded from the study due to "bad" fractures, animal death or not analyzable histological slices.
| Exposure | Parameters |
|---|---|
|
Exposure 1:
900 MHz
Exposure duration:
30 min/day, 5 days/week for 8 weeks
|
|
| Frequency | 900 MHz |
|---|---|
| Type | |
| Exposure duration | 30 min/day, 5 days/week for 8 weeks |
| Exposure source | |
|---|---|
| Distance between exposed object and exposure source | 5 mm |
| Chamber | rats were exposed in a PVC-restrainer put on the dipole antenna |
| Setup | electromagnetic energy generator was used |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| SAR | 8 mW/kg | - | calculated | - | - |
| power density | 1.04 mW/cm² | maximum | measured | - | - |
The x-rays and the histological slices showed that the fracture healing was significant worse in the exposed group compared to the control group. Additionally, the motility of the tibial bones was significantly lower in the exposed group than in the control group.
The authors conclude that an exposure to a 900 MHz electromagnetic field could have a negative effect on the bone fracture healing in rats.
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