上颌第一前磨牙三维模型的建立与研究

目的：建立上颌第一前磨牙三维模型，以辅助牙体解剖学数字化教学和指导临床根管治疗术。方法：对人离体上颌第一前磨牙通过ConebeamCT扫描，获得DICOM格式影像，将获得的影像定位后利用Mimicsl0．0三维重建软件采集牙釉质、牙本质及髓腔的点数据，然后将采集到的点数据导入到MagicslO．0软件进行面网格化，将网格化后的图像标本进行光滑处理后保存，再次利用MimicslO．0三维重建软件进行数据处理，最终获得清晰的牙体及根管系统三维立体图像。结果：准确的建立了包含牙釉质、牙本质、牙髓腔的三维立体模型。结论：本实验方法建立的上颌第一前磨牙的三维模型，具有极高的真实性和精确性，对辅助教学、指导临床根管治疗都具有重要意义。为牙体解剖教学和口腔临床应用提供了一种简捷而精确的建模方法。

Establishment and Research of the Three Dimensional Model of the Maxillary First Premolar

Objective： To establish a handy, pinpoint and rational three-dimensional model of the maxillary first premolar. Meth- ods： To get DICOM format images of a maxillary first premolar through the Cone beam CT scanning. Then the dicom images were man- aged by soft-wares, such as Mimicsl0.0 and Magicsl0.0, to establish a three-dimensional model. Results： A three-dimensional model of the maxillary first premolar which included enamel, dentin and pulp canal was accurately established. Conclusion： This experiment method to establish the maxillary first premolar three dimensional model has the extremely high authenticity and accuracy. The model in- cludes enamel, dentin and pulp canal. We can observe the model of teeth, the perspective model of pulp cavity, the cross-sectional model of teeth and the perspective model of teeth and pulp cavity from all directions. It is significantly for auxiliary teaching and clinical en- dodontic therapy. It provides a simple and precise method for teachers and dentists to establish models.