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Application Of Titanium - Nickel Memory Alloy In Medical Treatment
Feb 18, 2017

Titanium-nickel alloy with different treatment with these two characteristics have their own characteristics, this feature applied to the medical, will be made into medical suture, according to clinical suture requirements, no damage to the muscles, intradermal suture, need Shape the available temperature memory metal suture line, do not need to shape the available superelastic metal suture, wound healing after the metal wire out to reach the body without leaving any foreign body, so that the wound will not appear hard, pinhole and other adverse circumstances, A medical product without injury after surgery.


Titanium-nickel alloy with different treatment with these two characteristics have their own characteristics, this feature applied to the medical, will be made into medical suture, according to clinical suture requirements, no damage to the muscles, intradermal suture, need Shape the available temperature memory metal suture line, do not need to shape the available superelastic metal suture, wound healing after the metal wire out to reach the body without leaving any foreign body, so that the wound will not appear hard, pinhole and other adverse circumstances, A medical product without injury after surgery.


Special properties of nickel-titanium alloy:

Shape memory characteristic (Shapedemory) shape memory is a certain shape of the mother phase from Af temperature above the cooling to Mf temperature below the formation of martensite, the martensite Mf below the temperature deformation, heated to Af below the temperature, with the reverse phase Change, the material will automatically restore its shape in the female phase. In fact, the shape memory effect is a thermally induced phase transition process of the nickel-titanium alloy.


Superelastic (superelastic) The so-called superelasticity refers to the specimen under the action of external force is far greater than the elastic limit strain of the strain, in the unloading of the phenomenon can be automatically restored. That is, in the matrix state, due to the role of external stress, resulting in stress induced martensitic transformation occurs, so the alloy exhibits a different mechanical properties than ordinary materials, its elastic limit is much larger than ordinary materials, and no longer comply with the tiger Gram law. Compared with the shape memory properties, superelasticity does not involve heat. In general, superelasticity refers to the increase of stress in a certain deformation range without increasing the strain. The superelasticity can be divided into two types: linear superelasticity and nonlinear superelasticity. The linear relationship between the stress and strain in the stress - strain curve of the former. The nonlinear superelasticity is the result of stress induced martensitic transformation and its inverse transformation in the process of loading and unloading in a certain temperature range above Af. Therefore, the nonlinear superelasticity is also called phase change pseudo-elasticity. The phase change of pseudo - elasticity of nickel - titanium alloy is about 8%. The superelasticity of the nickel-titanium alloy can change with the change of the heat treatment condition. When the arch wire is heated to above 400oC, the superelasticity begins to decrease.

Sensitivity of temperature changes in the mouth: stainless steel wire and CoCr alloy orthodontic treatment of orthopedic wire is basically not affected by the temperature inside the mouth. The correction of the superetic nickel-titanium alloy orthodontic wire varies with the temperature of the oral cavity. When the amount of deformation is constant. The temperature increases, the correction force increases. On the one hand, it can accelerate the movement of the teeth, because the temperature changes within the mouth will stimulate the device due to the treatment of hair caused by delayed blood flow stagnation of blood flow, so that in the process of tooth movement to repair cells to be fully nutrient, Maintain its vitality and normal function. On the other hand, orthodontist doctors can not accurately control or measure the correction of oral environment.

Recently there is a non-invasive beauty skin suture needle, the needle is characterized by the end of the suture needle connected to a titanium nickel memory alloy wire as a suture, and plated with metal zinc. As the memory alloy wire has a temperature memory, when the original set temperature to form a straight line, showing the elastic properties of metal materials, which is the general metal material does not have, in this way the skin suture, the surgical wound The healing is ideal.


To achieve a suture stereotypes, muscle bundling, suture stereotypes, muscle bundles are used in summary of the various suture needles, the use of stitches suture and live knot, like pulling straight lines will be wound out of the metal wire pulled out, people There is no foreign body in the body. The ability to pull the wire out of the metal lies in the temperature memory of the metal and the superelasticity that is not affected by temperature.