Biocompatibility is defined as "the study and knowledge of the interactions between living and non-living materials." Biomaterial is defined as "a material intended to interface with biological systems to evaluate, treat, augment, or replace any tissue, organ, or function of the body." Lost and damaged tissues can be replaced or strengthened with materials of both organic and inorganic origin using regenerative medicine. Metal alloys, ceramics, polymers, and biocomposites are examples of such materials, which are referred to as "biomaterials" when employed for biomedical purposes. The function of biomaterials is what distinguishes them. They must have the necessary mechanical, chemical, and biological properties—optimized for their purpose and biological surroundings—as they interact with and replace the function of certain host tissues.
Tissue engineering is the process of combining scaffolds, cells, and physiologically active substances to create functional tissues. It emerged from the field of biomaterials development. Tissue engineering aims to create functional constructions that can be used to restore, maintain, or improve damaged tissues or complete organs. Engineered tissues such as artificial skin and cartilage have been approved by the FDA, but their application in human patients is currently limited. Tissue engineering now plays a little part in patient therapy. Patients have received supplemental bladders, tiny arteries, skin grafts, cartilage, and even a whole trachea, but the treatments are still experimental and expensive.