Inter-relations between insertion centroids measured by 2D (X–Y Plane) distance, Z position (+ distal; − proximal) and 3D distance (all as Mean ± SD in mm).

Inter-relations between insertion centroids measured by 2D (X–Y Plane) distance, Z position (+ distal; − proximal) and 3D distance (all as Mean ± SD in mm).各插入质心间的相互关系：通过二维（X-Y平面）距离、Z轴位置（+代表远端；-代表近端）与三维距离进行测量，所有数据均以平均值±标准差形式呈现，单位：毫米。