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The Journal of Bone and Joint Surgery, Vol 67, Issue 4 577-585, Copyright © 1985 by Journal of Bone and Joint Surgery, Inc
Treatment of recalcitrant non-union with a capacitively coupled electrical field. A preliminary report
CT Brighton and SR Pollack
Twenty-two well established non-unions in twenty patients were treated with
a capacitively coupled electrical signal (sine wave, sixty kilohertz, five
volts peak to peak) that was applied non-invasively through stainless-steel
capacitor plates placed on the skin surface overlying the approximate site
of the non-union. The average age of the eleven female and nine male
patients in this series was 38.4 years, and the average duration of the
twenty-two non-unions was 3.3 years. Seventeen of the non-unions were
labeled recalcitrant, meaning that they had failed to heal after either
previous bone-grafting or another type of electrical stimulation, or both.
Five of the non-unions had not been previously treated. Seventeen (77.3 per
cent) of the non-unions achieved solid osseous union after an average of
22.5 weeks of treatment with capacitive coupling. The results in this small
series were not affected by the non-union being recalcitrant, by the fact
that one patient bore full weight on the extremity in a cast, by the
presence of osteomyelitis, or by the presence of remaining metallic
internal-fixation devices in the bone. Since capacitive coupling is
non-invasive, involves portable equipment, allows full weight-bearing on
the lower extremity in a cast, is easy to apply, and does not require
precise localization of the capacitor plates, it has distinct advantages
over other methods of treating non-union with electricity.
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