The relation between the trochlear line and the clinical epicondylar axis in patients with knee-osteoarthritis

VernacularTitle:膝关节骨性关节炎患者中前髁连线与通髁连线的关系
Author: Zhiqiang ZHENG ¹ ; Wenquan CUI ; Jiaming WAN ; Zhiming QI ; Changle REN ; Qing LI ; Pengfei LI
Author Information

1. 116033,大连市中心医院关节外科
Keywords: Arthroplasty,replacement,knee; Rotation; Osteoarthritis
From: Chinese Journal of Postgraduates of Medicine 2018;41(6):511-515
CountryChina
Language:Chinese
Abstract: Objective To determine the angles of trochlear line(TL), antero-posterior line (APL) and posterior condylar line (PCL) with clinical epicondylar axis (CEA), analyze the variability difference in 3 axes relative to CEA. Methods The right knees in 36 patients with knee osteoarthritis (gradeⅣ) and who had underwent total knee arthroplasty were enrolled in this study, 11 male patients aged 60-81 (69.1 ± 6.3) years and 25 female patients aged 33- 85(67.7 ± 12.2) years. All of right knees were scanned using computed tomography. The angles between the CEA and each of the 3 axes (TL, PCL, APL) were measured using software. Results The angles of TL-CEA, APL-CEA and PCL-CEA was (6.10 ± 3.22)°, (85.80 ± 2.86)°and (2.70 ± 1.80)°. The F tests showed that the angel invariability between the TL and CEA the APL axis (α=0.58) or the PCL (α=0.28) for referencing the CEA had no significant differences. Conclusions The TL can be a relatively reliable reference axis to determine rotational alignment of the femoral component similar to PCL and APL.