The Role of Bone Grafts in the Management of Complex Fractures

Complex fractures, which are characterized by substantial loss of bone, severe disintegration, or nonunion, pose significant challenges in the field of orthopedic surgery. Bone grafting is recognized as a valuable technique for enhancing bone healing, restoring structural integrity, and improving functional recovery. Bone grafts are grouped into three types: autografts, allografts, and synthetic substitutes, each with unique benefits and drawbacks. Autografts, which originate from the patient’s own body, have superior osteogenic, osteoinductive, and osteoconductive characteristics, making them the gold standard. Still, donor-site morbidity and limitations on accessibility are concerns. Allografts derived from cadaveric sources offer a possibility that eliminates donor-site complications; however, they are associated with immunological rejection and disease transmission. Synthetic grafts and bioengineered scaffolds are gaining popularity due to their biocompatibility and ability to be customized to individual patient needs, which often incorporate growth factors (e.g., BMPs and VEGF) and stem cells to promote regeneration. The integration of bone grafts with modern surgical procedures, including 3D printing, tissue engineering, and growth factor therapies, has revolutionized the management of fractures. Based on the literature reviewed, 3D-printed scaffolds can offer patient-specific architectures along with controlled mechanical and biological properties, whereas newly developed bioprinting and artificial intelligence-based technologies may enhance scaffold design, vascularization, and regenerative performance. Despite these advances, optimizing graft selection and vascularization remains crucial to achieving optimal outcomes. This review focuses on the role of bone grafts in complex fracture care, specifically their biological and mechanical contributions to bone regeneration. Future research should focus on enhancing scaffold vascularization, biomaterial performance, personalized care, and manufacturing consistency, along with adequately powered preclinical and long-term clinical studies. An interdisciplinary approach involving regenerative medicine, biomechanics, 3D bioprinting, and artificial intelligence may be required to generate more effective and patient-specific treatments for complex bone defects.