Pulsed electromagnetic field treatment enhances healing callus biomechanical properties in an animal model of osteoporotic fracture.
Delayed bone healing has been noted in osteoporosis patients and in the ovariectomized (OVX) rat model of estrogen-depletion osteopenia. Pulsed electromagnetic field (PEMF) devices are clinically approved as an adjunct to cervical fusion surgery in patients at high risk for non-fusion and for the treatment of fracture non-unions. These bone growth stimulating devices also accelerate the healing of fresh fracture repair in skeletally mature normal rats but have not been tested for efficacy to accelerate and/or enhance the delayed bone repair process in OVX rats. The current study tested the hypothesis that daily PEMF treatments would improve the fracture healing response in skeletally mature OVX rats. By 6 weeks of healing, PEMF treatments resulted in improved hard callus elastic modulus across fibula fractures normalizing the healing process in OVX rats with respect to this mechanical property. Radiographic evidence showed an improved hard callus bridging across fibula fractures in OVX rats treated with PEMF as compared to sham treatments. These findings provide a scientific rationale for investigating whether PEMF might improve bone-healing responses in at-risk osteoporotic patients.
['Androjna|Caroline|C|', 'Fort|Brian|B|', 'Zborowski|Maciej|M|', 'Midura|Ronald J|RJ|']
D000818:Animals D001851:Bone Diseases, Metabolic D002146:Bony Callus D004195:Disease Models, Animal D055119:Elastic Modulus D005260:Female D005360:Fibula D017102:Fracture Healing D055909:Magnetic Field Therapy D058866:Osteoporotic Fractures D010052:Ovariectomy D011897:Random Allocation D017207:Rats, Sprague-Dawley D013997:Time Factors D055114:X-Ray Microtomography
bone osteoporosis PEMF fracture repair delayed healing