Digital design for surface organ reconstruction

Conventional techniques for surface organ reconstruction in burn and plastic surgery are often limited by their imprecision, lack of customization, and suboptimal functional outcomes. The integration of digital design technologies, including three-dimensional (3D) scanning, reverse engineering, computer-aided design/computer-aided manufacturing (CAD/CAM), 3D printing, and artificial intelligence (AI), has ushered in a paradigm shift toward patient-specific, data-driven reconstructive approaches. This review systematically outlines the technical framework, clinical applications, and recent advancements in digital design for reconstructing key surface organ such as the ear, nose, breast, and fingers. Clinically, these technologies enable high-fidelity anatomical and functional replication: 3D-printed auricular scaffolds combined with AI optimization improve symmetry and hearing outcomes; patient-specific nasal prostheses restore airflow and aesthetics; biomechanically tuned breast implants promote long-term stability and soft tissue regeneration; and bionic finger prostheses restore grip strength and tactile sensation. Key technical benefits include submillimeter anatomical accuracy, preoperative simulation, biomechanical optimization, and streamlined surgical planning, collectively reducing complication rates and enhancing patient satisfaction. However, several challenges remain, including mismatched degradation rates of biomaterials, limited vascularization in engineered constructs, high costs, and a lack of standardized protocols and ethical guidelines. Future progress will depend on smart biomaterials, four-dimensional (4D) bioprinting, deep AI integration, digital twins, and interdisciplinary collaboration. Despite current limitations, digital design is positioned to advance surface organ reconstruction toward true functional regeneration, establishing itself as a cornerstone of modern regenerative medicine.