To explore the application value of digital 3D printing technology for repairing mandibular defects with fibular flaps and to provide a basis for accurate repair mandibular defects.

Nine cases of mandibular defects were selected, and spiral CT and CTA of the lower limbs were performed before the operation. The osteotomy guide plate and plastic guide plate were created using computer software, and the titanium plate was rebuilt according to the printed mandibular model. During the operation, an osteotomy guide plate was used for mandibular resection; a fibula bone plastic guide plate was used to reconstruct the fibular flap and reconstruct the mandibular defects.

The entire fibula flap survived, and the occlusal relationship was good. There was no complications in the donor site. The patients were satisfied with the appearance of the repair. All patients were followed up for 3 to 6 months, at which point the bone was basically healed.

Using a digital 3D printing technique to repair mandible defects with a fibular flap can shorten the operation time, reduce the risks of operation, and better restore the maxillofacial shape and the function of the jaw, which is consistent with the concept of appropriate medical treatment. Additionally, this process provides a better method for the treatment of mandibular defects.