Magnesium Alloy For The Most Appropriate Medical Metal Materials
Used in clinical biomedical materials biomedical metallic materials, inorganic materials, polymeric materials, composite materials, and biomimetic materials. Medical metal materials and polymers and ceramic materials compared with high strength, toughness, and processing performance, therefore the most widely used. At present, the main clinical applications of medical metal are stainless steels, cobalt-based alloys, titanium alloys, shape memory alloys, precious metals as well as pure metal tantalum, niobium and zirconium. But clinical application showed that, above material are exists some disadvantages: in human within released toxicity metal ion, led to receptor body inflammation, to reduced biological compatible sex; modulus most cannot is good to and people bone similar, led to stress block effect, to reduced on new bone organization growth and remodeling of stimulus role, last led implanted body of not stable; currently clinical using of medical with metal are for not degradation material, dang implanted body in human within of served expires Hou, must through again surgery out, Will increase the suffering of patients and medical cost burdens. But in recent decades found that magnesium is to overcome the above shortcomings of new biomedical implants.
As fracture with internal fixation of magnesium alloy materials has obvious advantages, the elastic modulus and yield strength of magnesium and bones closer, can effectively avoid stress shielding effect, if as an implant material, you can avoid the possibility of a second operation. Also, magnesium is a basic element in human metabolism and bone tissue, micro releases beneficial to the human body, has a very low equilibrium electrode potential, particularly susceptible to corrosion in solutions containing Cl-ions and degradation. A large number of studies have suggested that magnesium has good biocompatibility, mg implant is not the animal body circulating immune, urinary system had a negative impact, and magnesium on the periosteal tissue and bone deposits harden has a positive effect. Magnesium alloy for its excellent mechanical properties, good biocompatibility and biodegradation, showed great potential, continue to attract scholars look, becoming one of the hotspots. But as a new generation of hard material, magnesium alloy research has just begun. Magnesium alloy to be used as medical materials in the field of medicine, magnesium alloy physics, chemistry, biology also proposed more stringent performance requirements. Therefore, magnesium is known as "revolutionary metallic biomaterials" global attention, it can be foreseen that within 3-5 years in the future, biodegradable magnesium alloys for medical use is expected to be used in clinical benefit in patients with the disease.