Biodegradable metal and non-metallic materials

Biodegradable metal materials
Biodegradable metal medical materials refer to a type of metal material that gradually corrodes and dissolves in the organism during the process of assisting and completing biological tissue repair. At the same time, the corrosion products of the material will not produce or produce slight host reactions to the organism. Therefore, the main components of biodegradable metal materials should be basic metal elements that can be excreted by organisms through metabolism, and have a certain corrosion rate within the organism.
Biodegradable metal materials mainly include pure magnesium and magnesium based alloys, pure iron and iron based alloys, pure zinc and zinc based alloys, tungsten and (calcium based, zinc based, and strontium based) bulk amorphous alloys, etc.
Biodegradable infinite non-metallic materials
The structural or material decay of bioceramics in the physiological environment, and their products are absorbed and utilized by the body or discharged from the body through the circulatory system, is called the biodegradation of ceramics. After implanting biodegradable or bioabsorbable ceramic materials into bone tissue, the materials are dissolved and absorbed through bodily fluids or excreted by the metabolic system, ultimately replacing the damaged area with newly formed bone tissue. The implanted biodegradable materials only serve as temporary scaffolds. Through a series of biochemical reactions in the body, some are excreted from the body and some participate in the formation of new bones.
Currently, the widely used and researched biodegradable and absorbable bioceramics mainly refer to calcium phosphate bioceramic materials, including tricalcium phosphate, tricalcium phosphate, hydroxyapatite, and their mixtures. After being implanted in the body for a period of time, these calcium phosphate ceramic materials can be partially or completely absorbed, leading to ceramic biodegradation. Among them, the ones with significant biodegradation are β- Tricalcium phosphate（ β- TCP) ceramics have good biodegradability, biocompatibility, and no biological toxicity. When implanted into the human body, the degraded Ca and P can enter the living circulatory system to form new bone.