Mitsutake Ryo, Tanino Hiromasa, Nishida Yasuhiro, Higa Masaru, Ito Hiroshi
Department of Orthopaedic Surgery, Asahikawa Medical University, Midorigaoka-Higashi 2-1-1-1, Asahikawa, 078-8510, Japan.
Department of Mechanical Engineering, University of Hyogo, 2167 Shosha, Himeji, 671-2280, Japan.
BMC Musculoskelet Disord. 2020 Feb 19;21(1):113. doi: 10.1186/s12891-020-3142-7.
During total hip arthroplasty (THA), the accurate placement of the femoral components is an important determinant of the success of the procedure. This study assessed the accuracy of cemented stem placement using a new angle-measuring instrument. The primary objective was to investigate the accuracy of the intraoperative measurements of cemented stem anteversion obtained using the angle-measuring instrument. Our secondary objective was to evaluate the accuracy of stem positioning performed using the angle-measuring instrument.
We compared the intraoperative stem anteversion measurements obtained using the angle-measuring instrument with postoperative stem anteversion measurements obtained using computed tomography in 149 hips (measurement accuracy). We also compared the target angle and postoperative stem anteversion in 105 hips (implantation accuracy).
The mean amount of intraoperative stem anteversion was 37.9° ± 10.1°, and the mean amount of postoperative stem anteversion was 37.0° ± 10.4°. The mean measurement accuracy was 0.9° ± 6.1°, and the absolute measurement accuracy was 4.9° ± 3.7°. The correlation coefficient for the relationship between the intraoperative and postoperative stem anteversion measurements was 0.824 (p = 0.000). The mean amount of target angle was 37.4° ± 7.6°, and the mean amount of postoperative stem anteversion was 35.9° ± 9.1°. The mean implantation accuracy was 1.4° ± 5.6°, and the mean absolute implantation accuracy was 4.3° ± 3.6°. The correlation coefficient for the relationship between the target angle and postoperative stem anteversion was 0.795 (p = 0.000).
The angle-measuring instrument measured intraoperative stem anteversion accurately, and cemented stem was implanted accurately during THA with the angle-measuring instrument.
在全髋关节置换术（THA）中，股骨部件的精确放置是手术成功的重要决定因素。本研究使用一种新型角度测量仪器评估了骨水泥型股骨柄放置的准确性。主要目的是研究使用该角度测量仪器进行骨水泥型股骨柄前倾角术中测量的准确性。次要目的是评估使用该角度测量仪器进行股骨柄定位的准确性。
我们将149例髋关节中使用角度测量仪器获得的术中股骨柄前倾角测量值与使用计算机断层扫描获得的术后股骨柄前倾角测量值进行了比较（测量准确性）。我们还比较了105例髋关节中的目标角度和术后股骨柄前倾角（植入准确性）。
术中股骨柄前倾角的平均值为37.9°±10.1°，术后股骨柄前倾角的平均值为37.0°±10.4°。平均测量准确性为0.9°±6.1°，绝对测量准确性为4.9°±3.7°。术中与术后股骨柄前倾角测量值之间关系的相关系数为0.824（p = 0.000）。目标角度的平均值为37.4°±7.6°，术后股骨柄前倾角的平均值为35.9°±9.1°。平均植入准确性为1.4°±5.6°，平均绝对植入准确性为4.3°±3.6°。目标角度与术后股骨柄前倾角之间关系的相关系数为0.795（p = 0.000）。
该角度测量仪器能准确测量术中股骨柄前倾角，并且在使用该角度测量仪器的全髋关节置换术中骨水泥型股骨柄植入准确。
