Maslennikov S. Substantiation of the polypropylene mesh use for the treatment of hip arthroplasty dislocation

Treatment of patients with hip implant dislocation is a topical and complex problem of modern orthopedics, which requires a systematic and thorough investigation. Dislocation of the femoral component of a hip arthroplasty is sometimes a devastating complication that can seriously affect a patient's quality of life, and today it is one of the most common problems that can occur after a total hip arthroplasty (THA). In spite of the considerable advances made in the treatment and prevention of the development of this complication, its frequency remains high, which gives the right to consider further search of possibilities for improvement and optimization of the methods of treatment of patients with dislocation of the femoral component of hip arthroplasty important and actual for traumatology and orthopedics. The aim of the study is to improve the results of treatment of patients with dislocations of the hip arthroplasty head by using polypropylene mesh implants to strengthen the posterior capsular structures of the hip joint. To achieve this aim, an experimental study conducted to evaluate the recovery of locomotor activity, to determine the timing of scar formation, and to determine the morphological features of restructuring of the knee capsule in case the capsule defect closed with a propylene mesh. The experimental research was conducted on laboratory rabbits witch were divided into two groups, the animals performed surgery to form a joint capsule defect. The knee joint was selected as the object of study because of its easy access to its structures and the anatomical features of the location of various connective tissue elements (ligaments, tendons, fascia, etc.) in the immediate vicinity of the joint capsule. An analysis of the obtained data showed that the support function and the movement function were restored within the first 5 days. For example, in 3 animals of the experimental group complete limb function restoration was observed on 5th day, which was 12 % of cases compared to the control group, where complete recovery of function on 5th day was observed in 8 % (2 animals) of cases. The recovery of limb static function in the control group was dominated by similar indicators of the main group 2,3 times and was 28 % (7 animals) compared with 12 % (3 animals) of the main group. This can be explained by the less pronounced pain syndrome in the animals of the control group due to the less traumatic surgery compared to the implantation of polypropelene mesh.