Explanation

biomedical materials formed from natural biological tissues after biological or chemical treatment. Biological tissues can be taken from tissues of the same or different species of objects; Biological or chemical treatment includes minor treatments such as fixation, sterilization, and antigenicity elimination to maintain the original configuration of the tissue, as well as strong treatments such as dismantling the original configuration and reconstructing a new physical form. The former involves treating fixed pig heart valves, bovine pericardium, bovine carotid artery, human skeletal artery, as well as freeze-dried bone fragments, pig skin, bovine skin, amniotic membrane, embryonic skin, etc. with glutaraldehyde; The latter includes powder, fiber, membrane, cavernous body, etc. composed of regenerated collagen, elasticity, hyaluronic acid, chondroitin sulfate and chitosan. Due to the loss of vitality of processed biological tissues? biologically derived materials are non vital materials. However, because biologically derived materials either have a configuration and function similar to natural tissues, or their composition is similar to natural tissues, they play an important role in maintaining the repair and replacement of human dynamic processes.

Classification