The 3D analysis of the sagittal curvature of the femoral trochlea in the Chinese population
The 3D analysis of the sagittal curvature of the femoral trochlea in the Chinese population
复制标题
中国人群股骨滑车矢状曲率3D分析
DOI：
10.1007/s00167-011-1679-6
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发表时间：
2012-05-01
影响因子：
3.8
通讯作者：
Zeng, Yiming
中科院分区：
文献类型：
--
作者：
Wang, Jun;Yue, Bing;Zeng, Yiming
目的不自然的股滑车矢状几何设计可能导致膝关节置换术后髌股运动异常和并发症。大多数先前的研究在二维副矢状面上检查了股滑车的矢状曲率，这可能不能代表复杂的三维股滑车的真实矢状曲率。方法对100例中国健康受试者（男女各50例）进行股骨滑车矢状位三维分析。在滑车内侧关节面和外侧关节面分别生成一个紧密配合球。球体的半径代表股滑车矢状曲率的矢状半径。然后建立一个圆柱体，并调整其半径以允许弯曲滑车槽的最深点接触圆柱体表面。圆柱的半径代表滑车槽的矢状半径。结果男性股骨滑车内侧和外侧的平均曲率半径分别为18.8±2.5 mm和25.5±2.8 mm。在女性中，股骨滑车内侧和外侧的平均曲率半径分别为20.2±3.0 mm和26.6±2.7 mm。男性滑车槽筒平均半径为19.6±2.0 mm，圆弧为123.2°±13.0°。女性患者桡骨半径为20.2±1.7 mm，圆弧为127.9°±11.7°。结论本研究为中国人群股骨滑车矢状位几何提供了可靠和一致的评估。本研究结果对提高对膝关节运动学的认识和开发生理性膝关节假体具有一定的指导意义。
PurposeAn unnatural design of the sagittal geometry of the femoral trochlea may cause abnormal patellofemoral kinematics and complications after knee arthroplasty. Most previous studies examined the sagittal curvature of the femoral trochlea on 2D parasagittal planes, which may not represent the true sagittal curvature of the complex 3D femoral trochlea.MethodsThe current study evaluated the sagittal geometry of the femoral trochlea of 100 healthy Chinese subjects (50 women and 50 men) with 3D analysis. A close-fit sphere was generated on the surface of the medial and lateral trochlear articular surface, respectively. The radii of the spheres represented the sagittal radii of the femoral trochlear sagittal curvature. A cylinder was then established and its radius was adjusted to allow the deepest points of the curved trochlear groove touching the cylindrical surface. The radius of the cylinder represented the sagittal radius of the trochlear groove.ResultsIn the men, the average radii of the curvature of the femoral trochlea were 18.8 ± 2.5 mm and 25.5 ± 2.8 mm for the medial and lateral femoral trochleas, respectively. In the women, the average radii of the curvature of the femoral trochlea were 20.2 ± 3.0 mm and 26.6 ± 2.7 mm for the medial and lateral femoral trochleas, respectively. The average radius of the cylinder of the trochlea groove was 19.6 ± 2.0 mm with a circular arc of 123.2° ± 13.0° in the men. In the women, the radius was 20.2 ± 1.7 mm with a circular arc of 127.9° ± 11.7°.ConclusionThe present study provided a reliable and consistent assessment of the sagittal geometry of the femoral trochlea in the Chinese population. The results of the current study may be helpful to improve the understanding of the knee kinematics and develop the physiological knee prostheses.