Measuring the angle between long axis of lunare bone and long axis of radius is helpful in the X-ray diagnosis of Colles fracture combined with lunare bone dislocation.

• 测量月骨中轴线与桡骨中轴线的夹角对诊断Colles骨折合并月骨脱位有重要价值；该夹角>2.；5°可作为Colles骨折合并月骨脱位的X线诊断依据。