A Case of Autologous Bone Grafting Using a 3D Model for Orbital Floor Defects: A Double Bridge Technique

Abstract

 Background: Three-dimensional (3D) models are rarely used in surgery, excluding cases of facial trauma with complex fractures or extensive bone defects due to tumor resection. We developed a novel bone grafting double-bridge technique for orbital floor defects caused by postoperative maxillary cysts in which routine surgery was difficult to perform. We used a 3D model to simulate the procedure preoperatively and intraoperatively.
 Method: The 3D model was created based on computed tomography images obtained in 1 mm slices preoperatively. The shapes of the titanium plate and bone to be grafted were estimated using this model. The sterilized 3D model was brought into the operating room intraoperatively, and the two titanium plates and grafted bone were processed by fitting them to the 3D model. Postoperatively, ocular motility disorder and ocular depression were not observed. The patient’s progress at 3 months postoperatively was good.
 Conclusion: We achieved good orbital morphology using a 3D model to perform an atypical bone graft for a wide defect in the orbital floor, which was challenging to fit in the surgical field.