Explanation

A kind of biomedical composite materials formed by composition of carbon fiber and medical macromolecule as reinforcement is the earliest medical composite materials simulating natural tissue structure, mainly used for polymethyl; Methyl acrylate (PMMA) bone cemem, artificial joint mortar and bone plate. For example? The strength and rigidity of the composite materials formed by pyrolytic carbon fibers randomly distributed in the ultra high molecular weight polyethylene matrix increase with the increase of fiber content. When the volume content of carbon fibers reaches 10% -15%, its strength, rigidity, fatigue resistance and friction resistance are significantly higher than that of the base material polyethylene. It is mainly used to make hip joint acetabulum and knee joint under complex stress and friction; With graphite and carbon fiber reinforced PMMA bone cemem, its tensile strength and elastic modulus can be increased by 50% and 10% respectively, and its fatigue resistance and creep resistance can also be greatly improved. At the same time, the polymerization temperature can be reduced, which has been used in clinical trials recently; HI graphite reinforced resin internal fixation plate can make its elasticity modulus close to natural bone by adjusting the fiber content of tt. It can avoid the stress shielding effect caused by elasticity mismatch. At the same time, the creep resistance can also be improved: After the carbon fiber reinforced PLA internal bone plate is implanted into the body, its stiffness and rigidity will also be reduced as the PLA is gradually degradation and absorbed. At the same time, new bone will grow synchronously and gradually recover, not only avoiding the stress shielding effect, And there is no need for a second surgery to remove it. In addition, human r tendons and ligaments made of carbon fibers arranged directionally in polylactic acid. After being implanted into the body, collagen will gradually degradation and absorb with polylactic acid and deposit directionally along the carbon fibers, forming new tendon like and ligament like tissues.

Classification