Application of 3-Dimensional Casting Model from CT Scan in the Orthognathic Surgery to Correct Facial Asymmetry-A Case Report

In treating patients with facial asymmetry, orthognathic surgery is often needed in combination with orthodontic treatment. Conventional surgical treatment planning uses dental casts and two-dimensional radiography to predict the amount of movement needed. However, the real movement modeled on the mounted casts on the articulator cannot be simulated accurately based on the two-dimensional radiographs. In this case report, we presented a new method using three-dimensional casting model for surgical planning and design.This case report presented an 18-year-old female (at the time of surgery), diagnosed as Class Ⅲ malocclusion with facial asymmetry. The surgical plan was orthodontic treatment combined with two-jaw orthognathic surgery. We used a three-dimensional casting model to design the guiding plate and surgical stent and simulated the real surgery. The guiding plate and surgical stent provided the surgeon a guide during surgical procedure. The patient's facial profile was greatly improved after surgery, and the result was satisfying. This new method of designing treatment helped the surgeon in achieving a more precise surgical result.