Biomaterials

1. Alfa Chemistry Biomaterials      延时符

2. Biomaterials are a class of high-tech materials used to diagnose, repair, or enhance their function in human tissues and organs, that is, natural or man-made materials used to replace and repair living tissues, and their effects are irreplaceable. Biomaterials can perform, enhance, or replace a function that is lost due to illness, injury, and so on, but can not restore a defective site.  延时符

3. Category Metal materials Such as alkali metals and their alloys    Inorganic materials Such as bioactive ceramics and hydroxyapatite Organic materials Organic materials are mainly polymer aggregate materials. According to the material properties, polymer materials are usually divided into synthetic materials and natural macromolecules. According to the usage of materials, polymer materials can be divided into bioinertmaterial, bioactive material and biodegradable material.

4. Characteristics      • Biological functionality • Chemical stability • Machinability • Biocompatibility 延时符

5. Characteristics 01 03 Functionality refers to a series of properties that a biological material should possess or complete with a corresponding biological function. For example, as a slow release drug, drug release performance is its biological functionality. Resistant to biological aging (particularly stable) or biodegradable (controlled degradation). • Chemical stability • Biological functionality 02 04 • Machinability • Biocompatibility Biocompatibility can be summarized as the relationship between material and living body, including blood compatibility and histocompatibility such as non-toxic, non-carcinogenic and no immune rejection.). Machinability means that the material can be molded and disinfected.

6. Applications Excellent biomedical metal materials include medical stainless steel, cobalt-based alloys, titanium and titanium alloys, nickel-titanium shape memory alloys, precious metals such as gold and silver, amalgams, niobium, tantalum and other metals and alloys. Artificial joints Cardiovascular system

7. Applications Soft tissue materials Soft tissue materials are primarily used as materials for soft tissues, especially for membranes and tubes of artificial organs. Polyethylene film can be used to make artificial lungs, kidneys, and the like. Polyester fibers can be used to make blood vessels, peritoneum, and the like. Hard tissue materials Biomedical polymers Hard tissue materials including acrylic polymer silicone rubber can be used to make artificial bones and artificial joints. Degradable materials Degradable material means that the aliphatic polyester has biodegradability and has been used for acceptable surgical sutures.

8. Applications Bioceramics After the bioceramic is implanted into the living body, the antelope apatite layer can be formed on the surface of the tissue, so it can be used for artificially implanting roots, crowns, bone filling materials and coating materials. Bioglass Bioglass can be implanted into the bone defect of the human body. It can directly bind to the bone tissue and repair the bone tissue and restore its function. Carbon materials Medical carbon materials are relatively stable in physiological environments and have been widely used for the repair of cardiovascular systems, such as artificial heart valves and artificial blood vessels. It can also be used as a coating material for metals and polymers.

9. Example Heart valves In the United States, 45% of the 250,000 valve replacement procedures performed annually involve a mechanical valve implant. The most widely used valve is a bileaflet disc heart valve, or St. Jude valve. The mechanics involve two semicircular discs moving back and forth, with both allowing the flow of blood as well as the ability to form a seal against backflow. The valve is coated with pyrolytic carbon, and secured to the surrounding tissue with a mesh of woven fabric called Dacron. The mesh allows for the body's tissue to grow while incorporating the valve.

10. Example Heart valves In the United States, 45% of the 250,000 valve replacement procedures performed annually involve a mechanical valve implant. The most widely used valve is a bileaflet disc heart valve, or St. Jude valve. The mechanics involve two semicircular discs moving back and forth, with both allowing the flow of blood as well as the ability to form a seal against backflow. The valve is coated with pyrolytic carbon, and secured to the surrounding tissue with a mesh of woven fabric called Dacron. The mesh allows for the body's tissue to grow while incorporating the valve.

11. Information Email info@alfa-chemistry.com Telephone 1-201-478-8534 1-516-662-5404 Address 2200 Smithtown Avenue, Room 1 Ronkonkoma, NY 11779-7329 USA Fax 1-516-927-0118

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