Whole vs Segmented 3D Models for Mandibular Reconstruction

Three-dimensional (3D) printing is increasingly used in surgery to help doctors plan and perform complex operations with greater accuracy. In this study, the investigators used 3D-printed jaw models to assist in rebuilding the lower jaw (mandible) after tumor removal, using bone taken from the lower leg in a procedure called a free fibular flap. The investigators compared two types of 3D-printed mandibular guides. One used a complete model of the patient's healthy mandible to guide reconstruction, while the other rebuilt the jaw by dividing the leg bone into planned segments and fitting them precisely into the jaw defect. All 3D design and printing were performed in-house by the surgical team using free computer software. After surgery, the investigators evaluated facial symmetry using standardized photographs taken before surgery and three months afterward. Both techniques helped surgeons achieve good reconstruction results. However, the segmented model produced more consistent facial symmetry, while results from the whole-mandible model varied more between patients. Overall, this study shows that in-house 3D printing is a practical and affordable tool for jaw reconstruction surgery. Although both approaches were effective, segmented models may offer more reliable results. Larger studies are needed to confirm these findings and improve future patient care.