The purpose of this paper is to acquaint rehabilitation personnel with the three types of commercial devices that use electricity to restimulate osteogenesis in nonunion fractures and other conditions. This background is important for the careful planning of the rehabilitation for these unique patients. These patients may not have used the involved extremity for a long period prior to resolution. The main problem will be osteoporosis. The modality of bioelectricity offers new, exciting possibilities for future applications in other tissues besides bone as well. J Orthop Sports Phys Ther 1985;7(2):54-58.