Explanation

Also known as biomedical polymer materials. As a biomedical materials, macromolecule and its composite materials are also called. It can come from artificial synthesis or natural products. In addition to meeting general physical and chemical performance requirements, it must also meet biocompatibility requirements. The evaluation of its biocompatibility shall be carried out according to the recognized biocompatibility evaluation procedures and standard test methods. Medical macromolecule can be divided into non degradation type and biodegradation type according to their properties. Non degradation macromolecule include polyethylene, polypropylene, polypropylene, aromatic polymerase, polysiloxane, etc. It is required to be stable in the biological environment for a long time, without degradation, crosslinking or physical wear, and have good physical and mechanical properties. Although there is no absolutely stable polymer, it is required that its own and degradation products do not have obvious toxic and side effects on the body, and at the same time, materials will not cause catastrophic damage. It is mainly used in the manufacture of human soft and hard tissue prosthesis, artificial organ, artificial blood vessels, contact lenses, membrane materials, adhesive and lumen products. biodegradation macromolecule include collagen, linear aliphatic polyester, chitin, cellulose, polyamino acid, polyvinyl alcohol, poly (e-caprolactone), etc., which can cause structural damage and performance degradation under the action of biological environment. It is required that their degradation products can be absorbed by the body through normal metabolism or discharged from the body, mainly used for drug release and delivery carriers and non permanent implantation devices. According to the purpose or use, biomedical polymer can be divided into cardiovascular system, soft tissue, hard tissue and other repair materials. The biomedical polymer used in the myocardial tube system should focus on its good anticoagulation, not damaging red blood cells, platelets, not changing the protein in the blood and not interfering with elonrolyte. biomedical polymer is the earliest, most widely used and most widely used materials in biomedical materials, and it is also a rapidly developing field.

Classification