A patient undergoing anterior mandibular resection due to an aggressive tumor is presented. A fibula free flap was chosen for the reconstruction. A: Surgical cutting guides were designed allowing for accurate resection. B: Reconstruction using a fibula free flap was planned. C: An intraoperative guide for accurate placement of the harvested flap was designed. D: A respective cutting guide for the fibula is designed allowing for a perfect flap harvest including supplemental positioning of the osteotomies performed on the fibula bone to create the final three-piece bone graft which will reconstruct the mandible.