唇腭裂患者牙槽嵴数字化模型建立及分析的初步探讨

目的 通过三维激光扫描建立唇腭裂患者牙槽嵴的数字化模型，为唇腭裂患者的模型分析建立科学方法。方法 唇裂修复术前于全麻状态下对1例右侧完全性唇腭裂患者的上颌无牙颌制取模型，用激光扫描仪扫描，通过计算机逆向工程软件进行模型重建。结果 此法可在重建模型上设定测量参考点9个，并可测出各标志点间的距离；模型可切割后测量和计算。结论 激光扫描三维分析方法是分析唇腭裂患者牙槽嵴形态及方向改变的一种理想方法，应用此模型可量化分析唇腭裂患者随生长发育而变化的上颌牙槽嵴形态。

Preliminary study on the reconstruction and analysis of digital maxillary cast of infants with cleft lip and palate

Objective To reconstruct a digital maxillary cast of infants with cleft lip and palate(CLP) by laser scanning and to provide an analysis method for the edentulous cast of CLP.Methods Under general anesthesia, an edentulous cast of one infant with right CLP was made and scanned by laser scanner.Using reverse engineering software, this cast surface was reconstructed.Results By this method, the digital cast could be observed from each degree and direction,and on this digital cast,the reference landmarks formeasarenment were determined,and the cast was then segmented,measured,and caculated.Conclusions The 3-D analysis developed is an ideal tool for the examination of 3-D morphological changes in the edentulous maxilla of patients with CLP. This newly developed analysis enables a quantification of the extent and direction of morphological changes in the maxilla of infants with CLP .