Figure 1
Diagram of millicurrent stimulation. Diagram of stimulation applied to cell-seeded collagen type-I gel samples and osteochondral explants. Electrodes of 3 mm in diameter were inserted at a distance of 3 cm. A current of 3 mA was applied; stimulation was carried out for 30 sec with a sinusiodal signal of 312 Hz amplitude modulated by two super-imposed signals of 0.28 Hz. Stimulation was repeated consecutively twice every two days for up to 3 weeks.