The Presence of Cartilage Affects Femoral Rotational Alignment in Total Knee Arthroplasty

作者：Yang, Yiming; Zeng, Xianli; Jin, Yan; Zhu, Zhemin; Tsai, Tsung-Yuan; Chen, Jiarong; Shen, Hongyuan; Li, Pingyue^*

来源：Frontiers in Surgery, 2022, 9: 802631.

DOI：10.3389/fsurg.2022.802631

• total knee arthroplasty
• preoperative planning
• cartilage thickness
• femoral alignment
• posterior condylar angle
• mechanical lateral distal femoral angle

ObjectiveTo assess the difference between the posterior condylar angle (PCA) and the mechanical lateral distal femoral angle (mLDFA) in the osseous and cartilaginous contours in a non-arthritic Chinese population. MethodsComputed tomography (CT) and magnetic resonance imaging (MRI) were obtained from 83 patients with knee injuries before arthroscopy, and femur and distal femoral cartilage three-dimensional (3D) models were constructed. The 3D cartilage model was arranged to share physical space with the 3D femoral model, and then PCA and mLDFA were measured on the osseous and cartilaginous contours, respectively. The differences between the measurements with and without cartilage were evaluated. ResultsThe average PCA with cartilage was 2.88 +/- 1.35 degrees and without was 2.73 +/- 1.34 degrees. The difference was significant in all patients and females but not in males. The average mLDFA with cartilage was 84.73 +/- 2.15 degrees and without cartilage was 84.83 +/- 2.26 degrees, but the difference was statistically insignificant in all groups. ConclusionPCA on the osseous and cartilaginous contours significantly differed with and without cartilage in the female group, suggesting that cartilage thickness should be considered during preoperative femoral rotational resection planning.

• 单位
  上海交通大学; 南方医科大学