The relationship between the posterior tibial slope and the sagittal femoral condylar shape: Two circles and ellipses

• DOI: 10.1002/ca.23543
• Publication Date: 2019-12-27T12:27:33Z
• Authors: Zheng Zhang; Mingyang Liu; Xiaoyu Wen; Shiwei Liu; Guanpeng Zhang; Chen Yang
• Keywords: FEMORAL CONDYLE; Ellipse

Abstract Background Whether the posterior tibial slope (PTS) is associated with femoral condylar shape has remained unclear. Classical anatomical studies considered sagittal profiles of condyles to consist two circles. Recently, an elliptical method was described simplify “two circles” model. Our purpose analyze relationship between PTS and condyle, that is, circles ellipses, using magnetic resonance imaging (MRI) scans. Methods Eighty right knees healthy subjects were scanned by MRI at full extension. The medial lateral measured (mPTS lPTS). On distal‐most slices, articular surfaces best fitted or respectively. radii inferior ( r m l , R respectively), semi‐major axes semi‐minor ellipses a b / ratios calculated. Results mPTS correlated significantly parameters condyle (all p < .05) = .017 .027, respectively). However, lPTS did not correlate > .461 .241, Conclusion but not. Both are feasible ways represent shape.