[Electrically enhanced damaged tissues healing. Part I: direct current in bone healing]

The reasons of investigators' interest of damaged tissues healing with electrical current in concise form are represented by the authors. The nonunions and pseudarthroses healing with direct current through negative polarized electrode is described in this article. Hypothetic biological healing mechanisms (as piezoelectric activity, streaming potentials, electric properties of glycosaminoglycan etc.) are discussed. Technical data of currents and their antibacterial properties are described.