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What is the use of titanium in medicine?

Update:2021-04-19
Abstract:

Small titanium plates and screws are used to fix the br […]

Small titanium plates and screws are used to fix the broken bones of the eye frame fracture.
Due to its biocompatibility (non-toxic and non-rejection by the human body), titanium is widely used in medicine, including surgical appliances and implants, such as replacement of hip bone frames and ball joints, which can last for up to 20 years. Titanium for this purpose is generally alloyed with 4% aluminum or 6% aluminum plus 4% vanadium.
Titanium has an inherent bone fusion property that allows titanium dental implants to stay in place for 30 years. This feature is also quite useful for orthopedic implants. The advantage of using titanium is that titanium has a lower elastic modulus (Young's modulus), which is closer to bone, and the implant is made for the purpose of repairing bone. Therefore, the bone weight will be more evenly distributed between the bone and the implant, which will reduce the chance of bone loss, because if the weight load is uneven, there will be stress shielding (the bone stress is reduced by the implant. Mass loss), and periprosthetic fractures between the surgical implant and the bone. However, the rigidity of titanium alloy is still twice that of bone, so the force on the bone around the implant will still be greatly reduced and may be degraded as a result.
Because titanium is not ferromagnetic, patients with titanium implants can safely undergo MRI examinations (this is convenient for those with long-term implants). The titanium to be implanted in the human body is heated by a plasma arc to remove surface atoms, and the newly exposed surface is then oxidized.
Titanium is made into surgical instruments for image-guided surgery, as well as wheelchairs, crutches and other products that require high strength and low weight

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