Effect of different-intensity SEMFs on bone mineral density and histomorphometry in SD rats.
- Author:
Yu-hai GAO
1
;
Kui CHENG
;
Bao-Feng GE
;
Ping ZHEN
;
Jian ZHOU
;
Xiao-Ni MA
;
Shao-Feng LI
;
Ke-Ming CHEN
Author Information
- Publication Type:Journal Article
- MeSH: Animals; Bone Density; radiation effects; Electromagnetic Fields; Female; Lumbar Vertebrae; pathology; radiation effects; Osteogenesis; radiation effects; Rats; Rats, Sprague-Dawley; Tibia; pathology; radiation effects
- From: China Journal of Orthopaedics and Traumatology 2014;27(11):933-937
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo investigate the effects of different-intensity sinusoidal electromagnetic fields (SEMFs) on bone mineral density (BMD) and histomorphometry in SD rats.
METHODSThirty female SD rats were randomly divided into three groups: group A (a control group), group B (0.1 mT group) and group C (0.6 mT group). The rats in group B and C were exposed to 50 Hz SEMFs 3 hours each day. However,the magnetic intensity was different between group B and group C:0.1 mT for group B and 0.6 mT for group C. After 8 weeks, all the animals were killed. Changes of BMD and histomorphometric properties were observed.
RESULTSCompared with group A, the BMD of whole body, femur and vertebrae of rats in group B increased significantly; the area percentage, number and width of bone trabeculae in vertebrae and femur of rats in group B were larger than those of group A; but the resolution of bone trabeculae of rats in group B was lower than that of group A. The trabecular number in group C rats were significantly decreased, compared with that in group A rats. The outcome of double fluorescence labeling in group B was found to be significantly different with that in group A. But the difference between rats in group A and C was not significant.
CONCLUSIONThis study demonstrates that 50 Hz 0.1 mT SEMFs can increase BMD, improve bone tissue microstructure and, promote bone formation.