Reducing the number of hip dislocations after total hip arthroplasty based on the study of the mechanisms of their development

Abstract

Total hip arthroplasty is one of the most effective surgical interventions that improves quality of life, increases a range of motion, and reduces pain in patients with degenerative hip joint disease. Total hip arthroplasty allows patients to return to daily social and professional activities. Thus, it is currently the best approach to the treatment of several chronic conditions affecting the hip joint, including osteoarthritis, avascular necrosis of the femoral head, and traumatic injuries to the femoral head and neck. The purpose of this study was to show the mechanisms of hip dislocation in the presence of a hip endoprosthesis, associated risk factors and factors that reduce the risk of dislocation, as well as its consequences and methods for minimization. Hip dislocation is a common complication following total hip arthroplasty. It is the cause of 2 to 3 % of failures of primary replacements, increasing even to 10 % in extreme cases in patients highly predisposed to this condition. In general, technical errors during implant placement are the cause of dislocation. The measures taken to prevent complications include activities aimed to the correct implant insertion and selection of the most appropriate type of implant for the patient, depending on individual needs. This work summarized the current knowledge about hip dislocation to help surgeons understand the changes in the hip biomechanics after its replacement and the impact of each element involved. This knowledge may help a surgeon to choose the most favorable surgical method and the most appropriate implant to reduce the risk of its dislocation.