下颌螺旋轴轨迹的三维显示和分析系统的开发

发布时间：2018-07-14 09:17

【摘要】：本研究拟开发下颌螺旋轴轨迹的三维显示和分析系统,用于定量分析下颌的三维空间运动。采用6自由度的超声下颌运动记录仪测量下颌运动;利用计算机断层扫描图像重建上颌、下颌颅骨的三维数字模型;通过结构光三维扫描仪将颅骨的三维数字模型校准至下颌运动数据的坐标系。基于Visualization ToolKit和Open Scene Graphics Library开发了本系统,利用下颌运动数据计算连续变换矩阵来仿真下颌运动,通过特征值方法计算下颌的螺旋轴轨迹,并实时显示螺旋轴轨迹与下颌的空间位置关系。本系统可以计算并输出下颌螺旋轴的参数(旋转、平移、方向、位置),用于精确评价下颌的三维空间运动。因此,本系统为采用螺旋轴理论研究下颌的三维空间运动奠定了一定的理论依据和实验基础。
[Abstract]:In this study, a three-dimensional display and analysis system of mandibular spiral axis trajectory is developed to quantitatively analyze the three-dimensional motion of the mandible. The mandibular movement was measured with a 6-DOF ultrasonic motion recorder, and the three-dimensional digital model of maxillary and mandibular skull was reconstructed by computed tomography (CT) images. The three-dimensional digital model of skull was calibrated to the coordinate system of mandibular motion data by structured light 3D scanner. Based on Visualization ToolKit and Open scene Graphics Library, the system is developed. The mandibular motion is simulated by calculating the continuous transformation matrix with the mandibular motion data, and the trajectory of the spiral axis of the mandible is calculated by the eigenvalue method. The relationship between the orbit of spiral axis and the space position of mandible was displayed in real time. The system can calculate and output the parameters (rotation, translation, direction, position) of the mandibular helical axis, and can be used to accurately evaluate the three-dimensional motion of the mandible. Therefore, the system provides a theoretical and experimental basis for the study of the three-dimensional movement of the mandible by using the helical axis theory.
【作者单位】：北京大学口腔医学院·口腔医院;河北医科大学第二医院;中国科学院软件研究所;
【基金】：河北省科技支撑计划项目资助(14277759D)
【分类号】：R318.01

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