Abstract
Recently, three-dimensional （3D） simulations are frequently used to predict the outcome of orthognathic surgery and treatment for jaw deformity patients. In these simulations, the maxilla/mandible and teeth are constructed from CT and STL data. These simulations can indicate the post-operative and post-treatment conditions and images, and patients can use this information to decide whether to have orthognathic treatment or not. Of course, these simulations can also provide valuable information for the team approach between oral surgeons and orthodontists.
The masticatory muscles are closely related to jaw deformity in many aspects; development of jaw deformities during the growth period, relation and interference with the mandibular bone during orthognathic surgery, and the post-operative stability and occlusion. Therefore, 3D simulations that include masticatory muscles as well as hard tissues are useful in this field. However, unlike hard tissues, simulation of muscles is not systematized by software and is not yet available for practical use in clinics. Therefore, we developed a practical system for 3D reconstruction of masticatory muscles from CT. In this review, we describe our clinical use and future aspects of 3D images of masticatory muscles.
