Zimmer, Inc., PO Box 708, Warsaw, Indiana 46581-0708, USA.
J Orthop Res. 2013 Oct;31(10):1643-52. doi: 10.1002/jor.22410. Epub 2013 Jun 25.
Better understanding of proximal tibia morphology can lead to improvements in total knee arthroplasty (TKA) through development of tibial tray families that adequately reflect the diversity of global anatomy using an appropriate number of components. We quantified variations in proximal tibial morphology at the TKA level and characterized differences attributable to gender and ethnicity. Virtual TKA was performed on digital models of 347 tibiae, spanning both genders and multiple ethnicities. The geometry of the resection profile was quantified using both a comprehensive set of morphological measurements (reflecting size and shape) and principal component analysis (PCA). The dominant statistical modes of variation were associated primarily with size (plateau dimensions, radii, and area), with lesser contributions associated with asymmetry and aspect ratios. Medial and lateral AP dimensions were strongly correlated with plateau ML width, with minimal differences in correlations due to gender or ethnicity. In conclusion, clinically relevant differences in proximal tibia morphology at the level of TKA resections across genders and multiple ethnicities can be attributed largely to variations in overall proximal tibial size, not gender- or ethnic-specific shape variations.
更好地理解胫骨近端形态学可以通过开发胫骨托板家族来改善全膝关节置换术（TKA），这些家族通过使用适当数量的组件充分反映全球解剖结构的多样性。我们对 TKA 水平的胫骨近端形态学变化进行了量化，并根据性别和种族特征对其差异进行了描述。对 347 个胫骨的数字模型进行了虚拟 TKA，这些模型涵盖了不同的性别和多种种族。使用全面的形态学测量（反映大小和形状）和主成分分析（PCA）来量化切除轮廓的几何形状。主要的统计模式变化主要与大小（平台尺寸、半径和面积）有关，与不对称和纵横比有关的贡献较小。内侧和外侧 AP 尺寸与平台 ML 宽度高度相关，由于性别或种族的不同，相关性的差异很小。总之，在 TKA 水平上，不同性别和多种种族的胫骨近端形态学存在临床相关差异，这主要归因于整体胫骨近端大小的变化，而不是性别或种族特异性的形状变化。
