Simulated patient for orthognathic surgery

Horace H S Ip, Christy S B Kot, James J. Xia

Research output: Chapter in Book/Report/Conference proceedingConference contribution

13 Scopus citations


Orthognathic surgery corrects a wide range of minor and major facial and jaw irregularities. This surgery will improve the patients' ability to chew, speak and breathe. In many cases, a better appearance will also result. With the recent advances in virtual reality (VR) and three-dimensional (3D) medical imaging technology, orthognathic surgery simulations typically requires costly volumetric data acquisition modalities such CT or MRI imaging for patient modeling. In this paper, we presents an approach for constructing 3D hard and soft tissue models of a patient based on colour portraits and conventional radiographs. This allows patient modeling to be done efficiently on low-cost platforms. Specifically, we extend the techniques developed by the author in [2] to hard tissue modeling. The extended technique employs a user-assisted approach to obtain the 3D coordinates of the feature points of the human face and jaw respectively from conventional photographs and radiographs. Then the displacement vectors of the feature points are computed by correspondence matching and interpolation against a generic head model and jaw bone model. The resulting combined hard and soft tissue models can be used for orthognathic surgical planning on a low-cost, PC-based platform.

Original languageEnglish
Title of host publicationProceedings of Computer Graphics International Conference, CGI
Place of PublicationLos Alamitos, CA, United States
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages7
StatePublished - Jan 1 2000
EventCGI 2000: The 18th Computer Graphics Internationa 'Humans and Nature' - Geneva, Switz
Duration: Jun 19 2000Jun 24 2000


OtherCGI 2000: The 18th Computer Graphics Internationa 'Humans and Nature'
CityGeneva, Switz

ASJC Scopus subject areas

  • Computer Science(all)


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