Optimization and Standardization Challenges in 3D Hydrogel Bioprinting

3D bioprinting technologies have unique potential in biomedical and tissue engineering, regenerative medicine, and pharmaceutical research. However, the hydrogel materials used for bioprinting are poorly understood, and there are currently no specific standards to ensure their printability and quality. This study systematically reviews existing standards related to the mechanical properties, biocompatibility, and sterility of hydrogels and assesses their suitability for 3D bioprinting. The results show that while current standards provide a good starting point, they must be adapted to address the unique challenges of hydrogel bioprinting, such as cross-linking processes and rheological behavior. This study underscores the urgent need to develop new, customized standards to improve the printability, structural integrity, and safety of bioprinted materials. The aim is to propose an optimized framework for evaluating and enhancing hydrogel printability.