In traditional virtual 3D orthognathic surgery, after repositioning the maxillary segment to the desired position, surgeons usually roughly rotate or adjust the mandibular segment to obtain a relatively good relationship with maxillary dentition to calculate the virtual terminal occlusion splint. However, surgeons are not easy to avoid penetrability, overlap, or an overly large space existing between the maxillary and mandibular dentitions during this process. The present report offered a new method to obtain a suitable virtual terminal occlusal splint that could avoid penetrability, overlap, or an overly large space between the maxillary and mandibular dentitions, and simultaneously accurately moving the maxillary or mandibular segment to the desired position utilizing the planned terminal occlusion plaster models in virtual orthognathic surgery. For double jaw surgery, after aligning the planned plaster models to the 3D maxilla and mandible, we could simultaneously move the maxillary and mandibular segment as a whole that maintain the planned terminal occlusion to the desired position. This present method may enhance the accuracy of 3D virtual orthognathic surgery and save plenty of time spend on virtual surgery simulation, which also offers a useful educational method for training junior surgeons and students.

中文翻译：

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虚拟3D正颌手术中颌骨节段的准确运动。

在传统的虚拟3D正颌外科手术中，将上颌节段重新定位到所需位置后，外科医生通常会粗略旋转或调整下颌节段，以获得与上颌牙列的相对良好的关系，以计算出虚拟终末咬合夹板。然而，在此过程中，外科医生不容易避免穿透性，重叠或上颌和下颌齿之间存在太大的空间。本报告提供了一种新的方法来获得合适的虚拟终端咬合夹板，该夹板可以避免上颌和下颌牙列之间的渗透性，重叠或过大的空间，并同时根据计划将上颌或下颌牙段精确地移动到所需位置虚拟正颌手术中的最终闭塞石膏模型。对于双颌手术，在将计划的石膏模型与3D上颌骨和下颌骨对齐后，我们可以同时将上颌和下颌骨整体作为整体移动，以将计划的最终咬合保持在所需位置。该方法可以提高3D虚拟正颌手术的准确性，并节省大量的虚拟手术仿真时间，这也为培训初级外科医生和学生提供了一种有用的教育方法。