The glenoid fossa exhibits retroversion and a spiral twist in the horizontal plane, this anatomy property should be considered in the design of shoulder prosthesis.
肩胛盂窝在轴位（水平）平面呈后倾改变及螺旋性扭曲改变，在肩关节假体设计中应考虑此解剖特点。
2
The transepicondylar axis of different position has no effect on volume rendering technique measuring the humeral head retroversion angle with multi slice spiral CT.
肱骨远端不同位置内外上髁轴线对多层螺旋CT容积再现测量肱骨头扭转角没有影响；
3
Advancement historiography is the essential reflection of history process in comparison with the existed advancement historiography, circulation historiography and retroversion historiography.