Objective:To apply three-dimensional xray Cephalometric and 3D CT on detecting cranial and maxillofacial sclerous tissues and compare their advantages and disadvantages.

• 目的:运用三维X线头影测量与三维CT测量方法研究蒙古族正常牙合成年人的颅颌面硬组织形态,比较两种测量方法优缺点。