数字化可视下颌骨的初步研究

目的建立数字化可视下颌骨的三维实体模型。方法将1例人体标本固定、灌注、冷冻、包埋、切削，选取从颏部到下颌骨髁突图像，通过摄像采集数据，描取每层下颌骨的皮质骨外形、牙齿及牙槽窝轮廓线及下颌管，各层轮廓线均形成闭合曲线。利用Amira软件系统进行下颌骨的外形及下颌管的重建，得到三维线框模型和实体模型。结果利用数字人数据得到下颌骨精细的三维模型，在三维空间上真实再现了下颌骨、下颌牙的解剖形态，并准确地显示出下颌神经管的位置。结论采用软件重建方法获得的下颌骨三维模型，为下颌骨的影像诊断及正颌外科手术治疗、下颌牙齿种植等提供了解剖学依据。

Study of Digital Visual Mandible

Objective To build a digital visible model of the mandible in order to provide morphological data for image diagnosis and operation of mandible diseases. Methods A malc adult cadaver specimen was taken for the purpose of study. A digital human databank was got after fixation, pcrfusion, refrigeration, embedding, section and photograph of the specimen. The thickness of each layer was 0.1 mm. To select mandible image data from chin to condyle and to draw an outline of mandible and teeth image of each layer in 2D Adobe photoshop 8.0. Finally, reconstruct 3D model of mandible was sct up in Amira reconstruction software. Results A 3D model of mandible was formed accurately using of digital human data. The model was finc, visible and displayed cross-section image of mandible. The anatomical shape of mandible and mandibular teeth were vividly reappeared in three-dimension. The location and trend of mandibular nerve canal were clearly appeared in the transparent model of mandible. The model could be revolved in 3D. Conclusion The study got a complete and exact cross-section data. The visualization of mandible can be realized in Amira reconstruction software. The reconstituted organs can be recovered to the natural state.