Even in modern conditions of achievements in the head and neck oncosurgery the restoration of the volume defects of the bone tissue in a jaw-facial region is impossible to do without the orthopedic methods application because of present severe psychoemotional and general state of the patients. The problem of prophylaxis of mandibular pathological fractures in its malignant affection constitute a peculiar place, taking into account a complexity and numerousness of the unsolved issues. There was elaborated and constructed apparatus for the pathological fracture prophylaxis or for fixing of fragments in the angle of a toothless mandibula. After the apparatus being applied in place the patient's quality of life improves: they better tolerate radiation therapy; the conditions for surgical treatment are improving; the acts of chewing and deglutition are not disordered, what improves the patients state significantly; the general image of the face is not disturbed. The methods may be introduced into specialized clinics.