Know Your Products Through PLA
Polylactic acid (PLA) Acid (PLA) belongs to Aliphatic polyester is one of the most important biodegradable and environment-friendly polymer materials. Its monomer lactic acid can be produced by large-scale fermentation of corn and other food crops, so it can completely get rid of the dependence on petroleum resources ； PLA material has excellent biodegradability. In the natural environment, under the action of bacteria and water, it can be completely degraded into carbon dioxide and water, which is harmless to the environment and can completely solve the problem of "white pollution". PLA is a kind of thermoplastic polymer, which has the advantages of high strength and high modulus. It can be processed by traditional processing methods such as extrusion, molding, casting, melt spinning, liquid spinning, blow molding and so on
PLA has excellent biocompatibility and biodegradability. The final degradation products are carbon dioxide and water, which will not pollute the environment. At the same time, PLA has high tensile strength and compression modulus, but it is hard, poor toughness, lack of flexibility and elasticity, and easy to bend. These shortcomings limit its application PLA material is recognized as a green material with environmental protection and sustainable development in the 21st century. All countries in the world have explored and developed it as a general plastic substitute, and its use and application fields will be more and more broad
1.The application in clinical orthopedics
Biodegradable polyester is widely used as an internal fixation material in clinical orthopedics because it can be degraded in vivo without secondary surgery.
2.Application in Sustained release medicine system
Biodegradable random copolymer of glycolide and lactide (PLGA) was used as carrier
3. Surgical Suture
The surgical suture made of biodegradable polyester does not need to be taken out twice, and has good compatibility with the body, and can degrade itself.
4. Fracture fixation materials
Because the strength and toughness of stainless steel is much greater than that of human bone, and the mechanical properties can not change dynamically with the process of bone healing, the phenomenon of "stress shielding" appears in medicine, which leads to osteoporosis and bone degradation of fracture site. PLA biodegradable materials can overcome these two defects .
5.Tissue engineering materials, tissue engineering refers to the application of life science and engineering principles and methods to build a biological device to maintain and enhance the growth of human cells and tissues, in order to restore the function of damaged tissues and organs.
