A new method measuring the rotation center of hip joint and its significance for hip replacement surgery

Liwen Zheng; Wanchun Wang; Zhihong LI; Tang Liu; Yongheng Luo; Lei Wang; Ren WU; Guoliang Huang; Ding LI; Shuo Jie

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A new method measuring the rotation center of hip joint and its significance for hip replacement surgery

VernacularTitle: 一种测量髋关节旋转中心的新方法及其在全髋关节置换手术中的临床意义
Author: Liwen ZHENG ¹ ; Wanchun WANG ¹ ; Zhihong LI ¹ ; Tang LIU ¹ ; Yongheng LUO ² ; Lei WANG ³ ; Ren WU ¹ ; Guoliang HUANG ¹ ; Ding LI ¹ ; Shuo JIE ¹
Author Information

1. Department of Orthopedics, the Second Xiangya Hospital, Central South University, Changsha 410011, China
2. Department of Radiology, the Second Xiangya Hospital, Central South University, Changsha 410011, China
3. School of Information Science and Engineering, Central South University, Changsha 410006, China
Publication Type:Journal Article
Keywords: Tomography, X-ray; Magnetic resonance imaging; Arthroplasty, replacement, hip; Photogrammetry
From: Journal of Chinese Physician 2019;21(11):1626-1631,1635
CountryChina
Language:Chinese
Abstract: Objective:To design and evaluate a new method for measuring the center of rotation of the hip joint, and to compare it with the traditional methods.
Methods:Data of healthy hips of 120 total hip arthroplasty (THA) patients (120 hips) and bilateral hips of 20 healthy volumteers (40 hips) were collected. A series of X-rays and magnetic resonance imaging (MRI) were taken from each patient with the hip joint abductted at differenct angles (0°, 7.5°, 15°, and 22.5°). The motion track of rotation center was obtained by comparing these X-ray and MRI images. The preoperative and postoperative data of 67 surgical patients who underwent two different measurement methods before surgery were compared.
Results:Compared with traditional measurement methods, the accuracy of our new method was significantly improved; the results of hip MRI verified the objectivity and accuracy of our new method; preoperative measurements and postoperative follow-up results showed that our new method had a better clinical effect than traditional measurements.
Conclusions:The team′s innovative new measurement method based on pelvic orthotopic X-ray photographs with different abduction angles of the hip shows more accurate data than traditional measurement methods and shows better clinical results.