Accuracy of components placement in direct anterior approach of total hip arthroplasty
JIANG Wenjin;ZHU Pingting;ZHANG Yiyuan;Fujian University of Traditional Chinese Medicine;
Objective To evaluate the accuracy of the components placement in direct anterior approach(DAA) of total hip arthroplasty(THA). Methods 296 patients primary performed unilateral total hip arthroplasties in orthopedic department of The Fuzhou Sceond Hospital Affiliated To Xiamen University(the bases for master degree of Fujian University of Traditional Chinese Medicine) from April 2012 to February 2017 were retrospectively analyzed.Among the 296 total hip arthroplasties cases,146 patients were treated with DAA,and the other 150 used posterolateral approach(PLA).All cases were primary hip replacement.The evaluation items included age,sex,body mass index(BMI),preoperative Harris hip score(HHS),the error values of the cup inclination,the error values of the cup anteversion,leg length discrepancy, and postoperative HHS. Results There were no statistical significance in mean age [(56.45±11.41) years vs(57.85±14.1) years,P=0.83],sex(60.1% vs 63.3%,P=0.40),BMI[(22.9±1.39) kg/m~2 vs(23.37±1.39) kg/m~2,P=0.78] and preoperative HHS(31±6.87 vs 29.85±7.18,P=0.57) between the two groups.However,compared with the PLA group,patients in DAA group had smaller error values of cup anteversion[(2.90±1.37) vs(1.00±0.83),P 0.05],smaller error values of the cup inclination[(3.47±1.94) vs(1.77±1.16),P 0.05],lesser limbs-length discrepancy[(0.81±0.40)cm vs(0.2±0.17)cm,P 0.05],and higher postoperative HHS(92.1±4.86 vs 94.4±3.09,P 0.05). Conclusions Operating in a supine position for the direct anterior approach in THA may reduce the intraoperative pelvic rotation and tilt,which in consequence can improve the accuracy of the acetabular component placement,and reduce leg length discrepancy,and postoperative HHS significantly.
【CateGory Index】： R687.4