Medical field
志联
2024-02-24
1. Medical Nitinol shape memory alloys must not only utilize their shape memory effect or superelasticity, but also meet chemical and biological requirements. Good biocompatibility. Nitinol can form a stable passivation film with the organism.
2. Currently, Nitinol alloys are mainly used in medicine, dental orthodontics: Superelastic Nitinol wires and stainless steel wires are used as dental orthodontic wires, with superelastic Nitinol wires being the most suitable. Stainless steel and CoCr alloy wires are commonly used in orthodontics, but these materials have the disadvantages of high elastic modulus and small elastic strain. In order to provide appropriate corrective force, the arch should be machined before correction, and ligation and fixation require skill. Using Nitinol alloy as orthodontic wire, even with a strain as high as 10%, no plastic deformation will occur. In addition, stress-induced martensite makes the elastic modulus nonlinear, that is, the orthodontic force fluctuates very little when the strain increases. This material is not only easy to operate and effective, but also reduces patient discomfort.
3. Scoliosis correction: Various scoliosis diseases (congenital, habitual, neurological, shaky, idiopathic, etc.) not only suffer from serious physical and mental harm, but also internal organ compression, requiring surgical correction. Currently, this operation is made of stainless steel Hayden rods. When placing the rod during surgery, the orthodontic force fixing the spine should be kept below 30-40 kg. Once the force is too large, the rod will be damaged. This will not only damage the spine, but also the nerves. At the same time, the orthodontic force changes over time after the rod is inserted. When the orthodontic force drops to about 30% of the initial value, a second operation is needed to adjust the orthodontic force, causing great physical and mental pain to the patient. The Harrington rod made of shape memory alloy only needs to place the orthodontic rod once to fix it. If the orthodontic force of the rod changes, by heating the shape memory alloy externally and raising the temperature to about 5℃ above body temperature, sufficient orthodontic force can be restored.
4. In addition, Nitinol shape memory alloys can also be used to make various bone joints, vascular clips, blood clot filters, and vascular dilator elements. Widely used in stomatology, orthopedics, cardiovascular surgery, thoracic surgery, hepatobiliary surgery, urology, gynecology, etc. With the development of shape memory, medical applications will be more extensive.
Previous:
Next:
Related News
Hotline:
Contact Email:
Address:
Building 19, Liandong U Valley, Sanhe Subdistrict, Huiyang District, Huizhou City, Guangdong Province, China
Follow WeChat
Add WeChat
Power by:www.300.cn | Tag | Privacy Policy | City List