OsteoNest is an innovative eco friendly bone scaffold designed to support the regeneration of bone tissue. It is developed using snail shell waste as a natural source of calcium carbonate (CaCO₃) and fish gelatin as an organic binding polymer. This combination of materials was selected due to their abundant availability, biocompatibility, biodegradability, and ability to promote cell growth and biological degradation. The fabrication process employs 3D printing technology, producing a porous