A system to create a three-dimensional model from computer-aided three-dimensional images has been developed and clinically applied as an aid to planning specific surgical procedures. During the research and development stage, we prepared a maxillofacial bone model for a patient with a jaw deformity. In this report we present our clinical experience, introduce an outline for the system, and discuss issues related to the system's potential application.
To develop the maxillofacial bone model we first took an X-ray CT for a three-dimensional image of the head and neck region before operation. We processed the CT using an AS4075 Toshiba processing system to obtain a three-dimensional image. From this image, we then prepared a three-dimensional model using the Solid Creation System from D-Mec Inc (The Solid Creation System makes three-dimensional models using resin which is hardened by laser irradiation). We then performed simulated surgery on the model. Next the actual operation was performed based upon the surgical procedures derived from simulated surgery. After the operation, another X-ray was taken and another three-dimensional model was made to observe the results of surgery.
The problem at this stage is inability to produce an accurate reproduction of occlusion. Nonetheless, three-dimensional models offer great potential by enabling us to develop surgical procedures for specific jaw deformities based on three-dimensional structure.
