Ruge S, Quooss A, Kordass B
Center for Dental, Oral and Craniomandibular Sciences, Department of CAD/CAM and CMD Treatment, Ernst Moritz Arndt University, Greifswald, Germany.
Int J Comput Dent. 2011;14(2):119-27.
Virtual articulation makes it possible to overcome the limitations of mechanical articulation. Novel visualization techniques have great advantages. In this study, the occlusal surfaces of the upper and lower teeth were digitized with a 3D scanner, and real functional movements of the mandible were recorded using the Jaw Motion Analyzer (JMA), an ultrasonic measurement system. A coupling component designed for clinical use in the patient's mouth was utilized for precise referencing of the movement and scan data. Similar to a two-sided impression tray, the coupling tray is used to take a joint impression of the upper and lower arches. The JMA records the positions of the mandible and the coupling component in space. The virtual articulator was designed for visualization of jaw relationships during mastication. For analysis of intercuspation, the system generates dynamic images on which closing movements/ dynamic occlusion and contact areas are highlighted. The jaw movement data are plotted to create an envelope surface representing the maximum possible space occupied by the mandible. Such an envelope surface is a type of virtual FGP (functionally generated path) bite registration. It can be applied to design virtual tooth restorations and helps to quantify the occlusal space in a virtual environment. This system can be used to individually register and utilize the variability of occlusal function.
虚拟咬合使得克服机械咬合的局限性成为可能。新颖的可视化技术具有巨大优势。在本研究中，使用三维扫描仪对上、下牙齿的咬合面进行数字化处理，并使用超声测量系统颌运动分析仪（JMA）记录下颌的实际功能运动。一种专为临床患者口腔使用而设计的耦合组件被用于精确参照运动和扫描数据。与双侧印模托盘类似，耦合托盘用于获取上、下牙弓的关节印模。JMA记录下颌和耦合组件在空间中的位置。虚拟咬合架旨在用于可视化咀嚼过程中的颌关系。为了分析牙尖交错，该系统生成动态图像，突出显示闭合运动/动态咬合和接触区域。绘制颌运动数据以创建一个包络面，该包络面代表下颌占据的最大可能空间。这样的包络面是一种虚拟功能生成路径（FGP）咬合记录。它可用于设计虚拟牙齿修复体，并有助于在虚拟环境中量化咬合空间。该系统可用于单独记录和利用咬合功能的变异性。
