Investment casting titanium alloy human joint castings

Investment casting titanium alloy human joint castings

Application of investment casting titanium alloy in human joints

Titanium and titanium alloy investment casting parameters

As a new type of alloy and a carrier material, medical titanium alloy is widely used in limb implants, alternative functional materials, dentistry, medical devices and other related fields. Titanium and titanium alloys have the following characteristics: good corrosion resistance, high specific strength, low elastic modulus, fatigue resistance, and good biocompatibility. Among them, good biocompatibility gives it unique advantages compared with other metals, so it is widely favored in the medical field. However, due to its low wear resistance and process performance, efforts to further improve it are also limited. Ongoing.

Titanium alloy is widely used in artificial joint materials

According to relevant literature reports, about 100 million patients in the world suffer from related inflammation of knee joints and arm joints every year, and replacement surgery is imperative. Therefore, titanium alloys with excellent replacement functions bring good news to this. Compared with materials such as ceramics and stainless steel, the elastic modulus of titanium alloy is closer to that of human bones, and it has more advantages in terms of modulus. Therefore, titanium alloys are widely used in the correction of ankle joints, elbow joints, etc. In addition, porous titanium alloy materials can make the prosthesis bioactive and help the healing of the femoral head; the surface of titanium alloy has good biocompatibility and can induce the growth of bone cells, so it is highly praised by clinicians and experts in the field of orthopedics. .

The main advantages of titanium and titanium alloys as implant restorations are: ① high strength, good chemical stability and biocompatibility; ② non-toxic and will not cause harm to the human body; ③ low elastic modulus, better matched with human bones ; ④ Memory alloy has excellent elasticity and shape recovery function. In summary, the application of titanium in skull repair is mainly reflected in the use of titanium mesh to repair defective skulls. Applications in human cardiovascular aspects include: preparation of artificial heart valves, blood filters, pacemakers and artificial heart pumps, etc.

It should be noted that titanium is not suitable for all artificial joint parts. Among joint parts, parts that often swing are not suitable because titanium is easy to wear (ceramics and cobalt alloys are suitable), and titanium alloys should be used for implanted parts. In order to quickly integrate it with the biological bone, the surface of the titanium alloy must be made uneven and coated with bone sensors such as apatite (Apatite) and bioglass.