The purpose of this technique report was to describe a fully digital technique to evaluate the mandibular position both in centric relation occlusion (CRO) and maximal intercuspation position (MIP). The procedure transfers data relative to the position of the maxillary and mandibular dentition to a virtual articulator based on a single cone beam computed tomography (CBCT) image. A CBCT scan of the patient was obtained in CRO, and the maxillary and mandibular casts were scanned both in CRO and MIP with an intraoral scanner. The model CRO scan data were registered on the dental part of the CBCT image by using a virtual articulator program, and a virtual facebow transfer process and mounting was performed. The virtual articulator was positioned in the right and left condyle medial pole and right orbitale. The mandibular position was evaluated in CRO and MIP by superimposing the data of the mandible position in both CRO and MIP. A quantitative 3D measurement was obtained by using the grid function. Based on this protocol, it is possible to use a fully digital approach to transfer the position of a patient’s maxillary dentition to a virtual articulator based on the data from a single CBCT scan and intraoral scans. This technique eliminates the traditional facebow transfer and mounting process and complicated laboratory procedures for evaluating mandibular positional changes in CRO and MIP.

本技术报告的目的是描述一种全数字技术，用于评估正中关系咬合 (CRO) 和最大牙尖交叉位置 (MIP) 中的下颌位置。该过程基于单锥束计算机断层扫描 (CBCT) 图像将与上颌和下颌牙列的位置相关的数据传输到虚拟咬合架。在 CRO 中获得了患者的 CBCT 扫描，并使用口内扫描仪在 CRO 和 MIP 中扫描了上颌和下颌模型。通过使用虚拟咬合架程序将模型 CRO 扫描数据注册在 CBCT 图像的牙齿部分，并执行虚拟面弓转移过程和安装。虚拟咬合架位于左右髁内极和右眶内。在CRO和MIP中通过叠加CRO和MIP中的下颌位置数据来评估下颌位置。通过使用网格函数获得定量 3D 测量。基于该协议，可以使用全数字方法根据单次 CBCT 扫描和口腔内扫描的数据将患者上颌牙列的位置转移到虚拟咬合架。该技术消除了传统的面弓转移和安装过程，以及用于评估 CRO 和 MIP 中下颌位置变化的复杂实验室程序。可以使用全数字方法根据单次 CBCT 扫描和口腔内扫描的数据将患者上颌牙列的位置转移到虚拟咬合架。该技术消除了传统的面弓转移和安装过程，以及用于评估 CRO 和 MIP 中下颌位置变化的复杂实验室程序。可以使用全数字方法根据单次 CBCT 扫描和口腔内扫描的数据将患者上颌牙列的位置转移到虚拟咬合架。该技术消除了传统的面弓转移和安装过程，以及用于评估 CRO 和 MIP 中下颌位置变化的复杂实验室程序。