title: Accurate movement of jaw segment in virtual 3D orthognathic surgery.
abstract: 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.
authors.affiliation: From the *Department of Oral & Cranio-maxillofacial Science, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai; †Department of Stomatology, The Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou; ‡National Die & Mould CAD Engineering Research Center, Shanghai Jiaotong University, Shanghai; and §Department of Orthopaedics, the First People's Hospital of Lianyungang, Lianyungang, China.
authors.forename: Jiewen
authors.initials: J
authors.lastname: Dai
authors.forename: Min
authors.initials: M
authors.lastname: Tang
authors.forename: Pengfei
authors.initials: P
authors.lastname: Xin
authors.forename: Guanghong
authors.initials: G
authors.lastname: Hu
authors.forename: Jiawen
authors.initials: J
authors.lastname: Si
authors.forename: Yuefu
authors.initials: Y
authors.lastname: Dong
authors.forename: Chao
authors.initials: C
authors.lastname: Xiao
authors.forename: Steve Guofang
authors.initials: SG
authors.lastname: Shen
mesh_terms: D003198:Computer Simulation; D003479:Curriculum; D003766:Dental Occlusion; D004499:Education, Dental, Graduate; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D007574:Jaw Relation Record; D008313:Malocclusion, Angle Class III / Q000601:surgery*; D008334:Mandible / Q000601:surgery*; D008437:Maxilla / Q000601:surgery*; D003765:Models, Dental; D061330:Multidetector Computed Tomography; D017090:Occlusal Splints; D056948:Orthognathic Surgical Procedures / Q000379:methods*; D025321:Surgery, Computer-Assisted / Q000379:methods*; D014584:User-Computer Interface