Kunz Manuela, Devlin Steven, Gong Ren Hui, Inoue Jiro, Waldman Stephen D, Hurtig Mark, Abolmaesumi Purang, Stewart James
School of Computing, Department of Materials and Mechanical Engineering, Queen's University, Kingston, ON, Canada.
Med Image Comput Comput Assist Interv. 2009;12(Pt 1):75-82. doi: 10.1007/978-3-642-04268-3_10.
Defects in articular cartilage can be repaired through osteochondral transplantation (mosaic arthroplasty), where osteochondral plugs from non-weight-bearing areas of the joint are transferred to the defect site. Incongruity between the plug surface and the adjacent cartilage results in increased contact pressures and poorer outcomes. We compare three methods to predict the desired repair surface for use in computer-assisted mosaic arthroplasty: manual estimation, a cubic spline surface, and a statistical shape atlas of the knee. The cubic spline was found to most accurately match the pre-impact cartilage surface; the atlas was found to match least accurately.
关节软骨缺损可通过骨软骨移植（镶嵌成形术）修复，即将关节非负重区域的骨软骨栓转移至缺损部位。栓表面与相邻软骨之间的不协调会导致接触压力增加，预后较差。我们比较了三种用于预测计算机辅助镶嵌成形术中所需修复表面的方法：手动估计、三次样条曲面和膝关节统计形状图谱。结果发现，三次样条曲面与撞击前软骨表面的匹配最为准确；而图谱的匹配最不准确。
