Objective: To collect and analyze the three-dimensional( 3D) facial profile variation of edentulous patients restored by complete denture. Methods: The 3D facial images of 20 Atwood Class Ⅱ edentulous patients were taken by DSC-2 3D facial imaging system before and after restoration of complete denture. Then,the two 3D facial images of each patient before and after restoration were registered in the same coordinate system by partial structure overlap. The differences between these two 3D facial images were ...