Hatamleh Muhanad, Turner Catherine, Bhamrah Gurprit, Mack Gavin, Osher Jonas
*Reconstructive Clinical Science, Cranio-Maxillofacial Prosthetics Unit †Orthodontics Department ‡Oral and Maxillofacial Department, King's College Hospital NHS Foundation Trust, London, UK.
J Craniofac Surg. 2016 Sep;27(6):e568-73. doi: 10.1097/SCS.0000000000002877.
Conventional model surgery planning for bimaxillary orthognathic surgery can be laborious, time-consuming and may contain potential errors; hence three-dimensional (3D) virtual orthognathic planning has been proven to be an efficient, reliable, and cost-effective alternative. In this report, the 3D planning is described for a patient presenting with a Class III incisor relationship on a Skeletal III base with pan facial asymmetry complicated by reverse overjet and anterior open bite. A combined scan data of direct cone beam computer tomography and indirect dental scan were used in the planning. Additionally, a new method of establishing optimum intercuspation by scanning dental casts in final occlusion and positioning it to the composite-scans model was shown. Furthermore, conventional model surgery planning was carried out following in-house protocol. Intermediate and final intermaxillary splints were produced following the conventional method and 3D printing. Three-dimensional planning showed great accuracy and treatment outcome and reduced laboratory time in comparison with the conventional method. Establishing the final dental occlusion on casts and integrating it in final 3D planning enabled us to achieve the best possible intercuspation.
双颌正颌手术的传统模型手术规划可能既费力又耗时，还可能存在潜在误差；因此，三维（3D）虚拟正颌规划已被证明是一种高效、可靠且具有成本效益的替代方案。在本报告中，描述了针对一名骨骼Ⅲ类基础上呈现Ⅲ类切牙关系、伴有面部不对称且合并反覆盖和前牙开牙合的患者的3D规划。规划中使用了直接锥形束计算机断层扫描和间接牙科扫描的联合扫描数据。此外，还展示了一种通过在最终咬合状态下扫描牙模并将其定位到复合扫描模型来建立最佳牙尖交错的新方法。此外，按照内部协议进行了传统模型手术规划。按照传统方法和3D打印制作了中间和最终的颌间夹板。与传统方法相比，三维规划显示出更高的准确性和治疗效果，并减少了实验室时间。在模型上建立最终牙合关系并将其整合到最终的3D规划中，使我们能够实现尽可能最佳的牙尖交错。
