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The International Journal of Adult Orthodontics & Orthogathic Surgery
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Publication:
International Journal of Adult Orthodontics and Orthognathic Surgery

Year 2000
Volume 15 , Issue 4

Back
Pages: 265 - 282

Three-dimensional virtual reality surgical planning and simulation workbench for orthognathic surgery

James Xia, MD, DDS, PhD, MIEEE/Nabil Samman, FRCS, FDSRCS/Richie Wai Kit Yeung, FRCS, FRACDS/Steve Guofang Shen, MD, DDS/Dongfeng Wang, BS, MS, PhD/Horace Ho Shing Ip, BSc, PhD/Henk Tideman, MD, PhD, DDS, FRACDS, FHKAM

A new integrated computer system, the 3-dimensional (3D) virtual reality surgical planning and simulation workbench for orthognathic surgery (VRSP), is presented. Five major functions are implemented in this system: post-processing and reconstruction of computed tomographic (CT) data, transformation of 3D unique coordinate system geometry, generation of 3D color facial soft tissue models, virtual surgical planning and simulation, and presurgical prediction of soft tissue changes. The basic mensuration functions, such as linear and spatial measurements, are also included. The surgical planning and simulation are based on 3D CT reconstructions, whereas soft tissue prediction is based on an individualized, texture-mapped, color facial soft tissue model. The surgeon enters the virtual operatory with virtual reality equipment, holds a virtual scalpel, and operates on a virtual patient to accomplish actual surgical planning, simulation of the surgical procedure, and prediction of soft tissue changes before surgery. As a final result, a quantitative osteotomy-simulated bone model and predicted color facial model with photorealistic quality can be visualized from any arbitrary viewing point in a personal computer system. This system can be installed in any hospital for daily use.

 

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