Abstract：
Orthognathic surgery primarily corrects skeletal anomalies and malocclusion to enhance facial aesthetics, aiming for an improved facial appearance. However, this traditional skeletal-driven approach may result in undesirable residual asymmetry. To address this issue, a soft tissue-driven planning methodology has been proposed. This technique estimates bone movements based on the envisioned optimal facial appearance, thereby enhancing surgical accuracy and effectiveness. This study investigates the initial implementation phase of the soft tissue-driven approach, simulating the patient\'s ideal appearance by realigning distorted facial landmarks to an ideal state. The algorithm employs symmetrization and weighted optimization strategies, aligning projected optimal landmarks with standard cephalometric values for both facial symmetry and form, which are essential in orthognathic surgery for facial aesthetics. It also incorporates regularization to preserve the patient\'s facial characteristics. Validation through retrospective analysis of preoperative patients and normal subjects demonstrates this method\'s efficacy in achieving facial symmetry, particularly in the lower face, and promoting a natural, harmonious contour. Adhering to soft tissue-driven principles, this novel approach shows promise in surpassing traditional methods, potentially leading to enhanced facial outcomes and patient satisfaction in orthognathic surgery.
摘要：
正颌手术主要纠正骨骼异常和错牙合，以增强面部美感，旨在改善面部外观。然而,这种传统的骨骼驱动方法可能会导致不良的残差不对称。为了解决这个问题，提出了一种软组织驱动的规划方法。这项技术根据预想的最佳面部外观估计骨骼运动，从而提高手术的准确性和有效性。本研究调查了软组织驱动方法的初始实施阶段，通过将扭曲的面部标志重新对准到理想状态来模拟患者的理想外观。该算法采用对称化和加权优化策略，将投影的最佳标志与面部对称性和形状的标准头颅测量值对齐，在正颌手术中对面部美学至关重要。它还包含正则化以保留患者的面部特征。通过对术前患者和正常受试者的回顾性分析验证了这种方法在实现面部对称方面的功效，特别是在下面的脸，促进自然，和谐的轮廓。坚持软组织驱动的原则，这种新颖的方法显示出超越传统方法的希望，可能导致改善正颌手术的面部结果和患者满意度。
