Automated Mesh Repair for Medical Model 3D Printing: A Robust Algorithm for Geometry Correction and Internal Cavity Elimination

Three-dimensional printing technologies, particularly resin-based additive manufacturing processes, require geometrically accurate input models to ensure safe and successful fabrication. This work proposes a comprehensive method for automated mesh repair, specifically designed to address the most significant issues with mesh geometries that affect 3D printing safety and success. The suggested approach tackles two main geometric challenges: (1) correcting non-manifold geometry by repairing singular vertices, edges, and faces, and (2) removing internal cavities to avoid issues while preparing G-code. The algorithm applies fixing operations by volumetric shrink-wrapping using a two-stage pipeline. The resulting technique overcomes the risks associated with printing geometries that are not optimal and reduces the pre-processing time associated with 3D printing workflows