The effects of exposure to a static electric field or 50 Hz electric field on bone healing in rats should be investigated.
A total of 45 male rats were randomly divided into the following groups (n=15 each): 1) exposure to a 50 Hz electric field, 2) exposure to a static electric field, 3) control group. A manual fracture was performed in the left tibia diaphysis of all rats, and fractures were fixed using circular plaster over the knee. As a result of excluded or deceased rats, not all rats could be examined in the different tests, however, at least 12 rats/group were analyzed.
| Exposure | Parameters |
|---|---|
|
Exposure 1:
50 Hz
Exposure duration:
30 minutes/day on 5 days/week for 8 weeks
|
|
|
Exposure 2:
0 Hz
Exposure duration:
30 minutes/day on 5 days/week for 8 weeks
|
|
| Frequency | 50 Hz |
|---|---|
| Type | |
| Exposure duration | 30 minutes/day on 5 days/week for 8 weeks |
| Exposure source | |
|---|---|
| Setup | rats were placed in cages between parallel plate capacitors; rats in the control group were kept under the same conditions as the exposure groups, although they were not exposed to an electric field; all experiments were conducted in a certified clean and electromagnetically shielded room |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| electric field strength | 6 kV/m | minimum | measured | - | - |
| electric field strength | 10 kV/m | maximum | measured | - | - |
| Frequency | 0 Hz |
|---|---|
| Type | |
| Exposure duration | 30 minutes/day on 5 days/week for 8 weeks |
| Exposure source |
|
|---|
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| electric field strength | 5 kV/m | - | - | - | - |
Radiologic, mechanical and histologic scores were lower in group 1 (50 Hz) than in group 2 (static electric field) and the control group. However, the differences were not statistically significant.
The authors concluded that there were no statistically significant effects of exposure to a static electric field or 50 Hz electric field on bone healing in rats.
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