Development of digital impression and biteregistration system for totally edentulous

应用数字技术开发了一套创新的全口义齿制作系统：使用ARM型三维数字化仪对无牙列进行跟踪和表面建模，使用计算机辅助设计特殊的咬合印模托盘，使用三维数码打印机快速制作原型，使用专用托盘进行印模和咬合配准。数字印模的分辨率平均误差约为0.6 mm，最大误差约为1.0 mm。这将被认为在完全无牙的初步印象范围内。我们认为，在种植覆盖义齿中使用数字光影测量技术进行基牙定位将是一个困难的目标。

An innovative fabrication system of complete denture has been developed using digital technology: tracing and surface modeling of edentulous using an arm-type three-dimensional digitizer, computer-aided designing of special occlusal impression trays, rapid prototyping using a three-dimensional digital printer, and impression and bite registration using the special trays. The resolution is about0.6 mm in average error and about 1.0 mm in maxim error for the digital impression. It will be considered within an allowance for preliminarily impressions of total edentulous. It is suggested that a digital impression for abutment positioning in implant overdentures using digital photogeometry will be a hard target