论文部分内容阅读
目的基于激光三维扫描牙颌模型,结合临床头部CT资料,建立包含牙根的数字化牙颌模型,记录牙冠和牙根解剖形态结构以及空间位置变化。方法 1例牙列正常成年女性,头部CT数据利用Mimics11.0软件建立口腔内单独牙齿和整个上下牙列三维数字化模型;三维激光扫描仪分别扫描上下颌石膏模型及其咬合关系,在GeoMagic10.0软件中,结合CT重建的单独牙齿的三维数字化模型,重构带有牙根的牙列三维模型,同时实现上下颌三维模型符合口腔实际咬合关系的位置恢复。结果重建了带有牙根的三维数字化上下颌牙列模型,不仅清晰显示牙冠的解剖特征、牙列的排列、牙根的形态和位置关系,并且准确恢复了上下颌牙列的咬合关系。结论在正畸治疗过程中,利用激光三维扫描及CT数据建立带有牙根的三维数字化牙颌模型,不仅可以显示牙冠牙根的解剖形态结构,还能够监测牙冠和牙根的移动情况,便于指导治疗进程,评价治疗效果。
OBJECTIVE: To establish a digital dental model of mandibular teeth based on laser three-dimensional (3D) dental cadaver model and clinical head CT data. The anatomical structure and spatial location of dental crown and root were recorded. Methods One female with normal dentition was used as the head CT data. The three-dimensional digital model of the oral cavity and the entire upper and lower dentition were established by Mimics11.0 software. The three-dimensional laser scanner was used to scan the upper and lower gypsum model and the occlusal relationship between them in GeoMagic10. 0 software to reconstruct the three-dimensional model of dental dentition combined with CT reconstruction of three-dimensional digital model of tooth, and at the same time to achieve the position recovery of the three-dimensional model of upper and lower jaw in line with the actual occlusion relationship. Results The three-dimensional digital maxillary and mandibular dentition model with root was reconstructed, which not only showed the anatomical characteristics of crowns, arrangement of dentition, root morphology and position clearly, but also restored the occlusion relationship of maxillary and mandibular dentition accurately. Conclusions During the orthodontic treatment, using 3D laser and CT data to establish a three-dimensional dental model with root, it can not only display the anatomic structure of the tooth root, but also monitor the movement of the tooth crown and root, Treatment progress, evaluation of treatment.