Dislocations of the head of the endoprosthesis of the hip joint: structure and causes of
Based on the study of clinical history and radiographic data of 62 patients with dislocation of the head of the endoprosthesis of the hip joint is determined that the incidence of dislocation was 2.2% of total number of total endoprosthesis replacement of hip joint and 15.6% among postoperative complications. These data correspond to the best results of the leading clinics in the world. The use of heads of large size and increasing experience of surgeons has allowed to reduce the share of dislocation of the endoprosthesis head from 2.8% in the period from 2003 to 2007 to 1.7% in the period 2008 - 2012 Identified a statistically significant predominance of patients of elderly and senile age in cases of spontaneous dislocation of the endoprosthesis head that may be associated with decreased muscle tone with age, not the preventive postoperative recommendations. Traumatic dislocations associated with high- energy trauma was observed mainly in patients of a younger age, 66.7% of the medium consisted of patients, of working age. The decrease of the angle of inclination when implanted acetabular below 50° decreases the proportion of spontaneous dislocation of more than 2.5 times and can be recommended for total persons of elderly and senile age.