Computer simulation system for orthognathic surgery

Abstract

Objective: The system aimed to make a simulation model of an orthognathic patient without using his/her computed tomography data.

Design: The morphological data of the teeth and face were obtained by laser scanner. All the data were integrated in the reference coordinate system of frontal and lateral cephalograms using projection matching technique.

Setting: A case of mandibular prognathism was analyzed and presented.

Experimental variable: About 7 mm (left side) to 6 mm (right side) of mandibular setback with a small rotation was performed on this case.

Results: Simulated osteotomies and bone movements help us to analyze the movement of bone and soft tissue. Collisions and gaps generated between bone segments and facial changes are shown.

Conclusion: This simulation system will be particularly useful for the selection of an optimal operative method in cases in which the change in facial soft tissue shape should be carefully deliberated.