【摘要】 选取光栅变形条纹直接分析方法，采用自制的牙冠表面形状三维测量仪和精密可调转台获得了上颌中切牙和下颌磨牙牙冠各个面的三维测量数据，将各面数据在ＵｎｉＧｒａｐｈｉｃ软件平台上通过旋转坐标拍的方法实现数据拼合，重建了牙冠表面的三维形态，生成了牙冠实体模型．更多还原

【Abstract】 To develop a curve-surface constructing method for tooth crown for dental CAD/CAM system. The five surfaces of a standard tooth plaster cast were measured with a rotating platform and an optical instrument both developed by ourselves for measuring tooth-crown 3-D shapes, the data were processed with UniGraphic software and special software programmed by us, the five group’s local date were changed into one coordinate and reconstructed the three dimensional shape of the tooth according to rotating coordinate axis. Two visual tooth crown models were obtained. The curve-surface constructing method could be applied for measurement of tooth shape.更多还原