A comparison of alendronate to varying magnitude PEMF in mitigating bone loss and altering bone remodeling in skeletally mature osteoporotic rats.

Bone
Caroline AndrojnaRonald J Midura

Abstract

Pulsed electromagnetic field (PEMF) treatments stimulate bone formation activities though further work is needed to optimize its therapeutic benefit. PEMF can generate local potential gradients and electric currents that have been suggested to mimic bone electrochemical responses to load. In line with this reasoning, a recent publication reported that PEMF application on isolated bone tissue induced detectable micro-vibrations (doi:https://doi.org/10.1109/TMAG.2016.2515069). To determine the ability of PEMF to intervene in a rat model of osteoporosis, we tested its effect on trabecular and cortical bone following ovariectomy. Four PEMF treatments, with increasing sinusoidal amplitude rise with time (3850 Hz pulse frequency and 15 Hz repetition rate at 10 tesla/sec (T/s), 30 T/s, 100 T/s, or 300 T/s), were compared to the efficacy of an osteoporosis drug, alendronate, in reducing levels of trabecular bone loss in the proximal tibia. Herein, the novel findings from our study are: (1) 30 T/s PEMF treatment approached the efficacy of alendronate in reducing trabecular bone loss, but differed from it by not reducing bone formation rates; and (2) 30 T/s and 100 T/s PEMF treatments imparted measurable alterations in lacunocanalicular ...Continue Reading

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