Department of Craniofacial Orthodontics, Chang Gung Memorial Hospital, Taoyuan, 333, Taiwan.
Graduate Institute of Dental and Craniofacial Science, College of Medicine, Chang Gung University, Taoyuan, 333, Taiwan.
Sci Rep. 2018 Aug 3;8(1):11673. doi: 10.1038/s41598-018-30124-2.
The aims of this study were to establish guidelines for the surgical occlusion setup of surgery-first orthognathic surgery, and evaluate the resulting characteristics and accuracy. Skeletal Class III patients (N = 53) underwent Le Fort I osteotomy and bilateral sagittal split osteotomy. Study models before orthognathic surgery were set according to the guidelines. Occlusion was measured and computer-aided surgical simulation was used to evaluate the characteristics and accuracy of the surgical occlusion. The mean age of participants was 25 ± 6 years with 24 males and 29 females. The occlusion was set as positive overjet (4.4 ± 2.0 mm) and overbite (1.4 ± 1.8 mm), Class II or I molar relation, and posterior cross bite (overjet: 4.9 ± 2.0 mm and 4.4 ±1.9 mm, respectively for the right and left second molars) and open bite (overbite: -2.0 ± 1.6 mm and -1.9 ± 1.3 mm, respectively for the right and left second molars). Normal jaw relationship and symmetry were noted after virtual surgery. None of the patients required new occlusal setup. Our data contribute the use of the surgery-first approach for skeletal Class III patients by establishing guidelines for a surgical occlusion setup in three dimensions.
本研究旨在制定手术先行正颌手术的手术咬合设置指南，并评估其结果特征和准确性。53 例骨骼 III 类患者（N=53）接受 Le Fort I 截骨术和双侧矢状劈开截骨术。术前正颌模型根据指南进行设置。测量咬合，并使用计算机辅助手术模拟评估手术咬合的特征和准确性。参与者的平均年龄为 25±6 岁，其中男性 24 例，女性 29 例。咬合设置为正覆合（4.4±2.0mm）和深覆合（1.4±1.8mm），磨牙关系为 II 类或 I 类，双侧第二磨牙后牙反合（覆合：4.9±2.0mm 和 4.4±1.9mm）和开颌（覆合：-2.0±1.6mm 和-1.9±1.3mm）。虚拟手术后，注意到正常的颌关系和对称性。无需对任何患者进行新的咬合设置。我们的数据为骨骼 III 类患者采用手术先行方法提供了依据，通过建立三维手术咬合设置指南。
