The application of digital model surgery in the treatment of dento-maxillofacial deformities

A retrospective study was conducted to explore the application of digital model surgery in the treatment of dento-maxillofacial deformities. Fifteen patients with dento-maxillofacial deformities were enrolled in this study. A digital craniomaxillofacial-dentition model was established by combining three-dimensional (3D) computed tomography (CT) and laser-scanned dentition models. Based on this composite model, surgical planning, simulations, and postoperative predictions were performed. Under the guidance of a 3D printed splint and guide, orthognathic surgeries and asymmetry corrections were performed. Clinical examinations were performed 3 months after surgery. Surgical accuracy was evaluated by comparing the postoperative CT 3D model with preoperative surgical planning. All patients successfully underwent virtual surgical planning, splint and guide 3D printing, and orthognathic surgery. Facial symmetry was greatly improved after surgery. The mean deviation between the preoperative design and actual surgical results was less than 2 mm. With preoperative planning, surgical simulation, and postoperative prediction, digital model surgery demonstrates great value in improving the accuracy of orthognathic surgery and restoring facial symmetry. It is regarded as a valuable technique to improve the results and execution of this potentially complicated procedure.