Effect Of The Prostheses Position And Orientation On Total Hip Arthroplasty

Objective : To study the effect of prosthesis position after total hip arthroplasty and to provide reference for clinical treatment.Methods: The patients who underwent total hip arthroplasty in our hospital from January 2012 to December 2016 were counted,and 86 of them were included in the clinical follow-up.The basic information of the patients was obtained through the haitai system,including name,gender,age,hospital number,diagnosis,etc.Measurement and collection of dummy position parameters through imaging system;According to the location parameters of the dummy,the average score and the excellent rate of the improved Harris score were statistically analyzed,and the data obtained were analyzed using SPSS24.0 software.Results: There were 86 patients after THA: no dislocation occurred.The improved Harris score was 86.84 ± 7.25,and the optimal rate was 91.86%.Outreach at 30°to 50°Angle reconstruction patients was 86.05%;Anterior Angle reconstruction in 5°and 25°patients was 87.21%;More than that,the incidence of pain and activity was significantly increased.The eccentricity ratio of femoral head(the ratio of the surgical side to the healthy side)accounted for 81.40% of patients with 80% to 120%.However,the ratio of the horizontal position of the center of the femoral head was 85% to 105%,and the vertical position ratio between 80% and 120% was not statistically significant.Conclusion: 1.The acetabulum abducent angles and former Angle in Lewinnek safety zone(namely outreach to Angle of 40 ±10°,former Angle of 15 ±10°)and femoral head eccentricity ratio from 80% to 120%,patients with postoperative functional recovery is better.2.The ratio of the horizontal position of the femoral head rotatory center was in the range of 85-105% and the vertical position ratio between 80% and 120%,which had no significant effect on the patients' postoperative Harris score.