Biocompression is a term applied to the stresses that have their origin in the elastic deformation of a diaphyseal bone, under the loads of functional activities. Its significance is the osteogenic response that biocompression stress induces in the cells of the healthy bone. The Biocompression Theory assumes that biocompression is as essential as osteogenic factors in the repair of a fracture. Thus, fracture healing requires not only stability, which is not osteogenic in itself, but physiologic biocompression. An external fixator that provides good stability and enables local biocompression has been used in the tibia of 127 patients, and healing with callus formation has been achieved in all.