The requirements for parts in the medical field are not only stable in performance, but also emphasize biocompatibility, safety and customization - not only to adapt to the human physiological environment, but also to meet the personalized needs of different patients. With its precise performance regulation and flexible molding ability, powder metallurgy technology has emerged in the manufacture of medical implants and precision medical device parts, providing important support for the upgrading of medical equipment and the development of precision medicine, and becoming an "invisible guard" to protect human life and health.

In the field of orthopedic medicine, powder metallurgy is the "best solution" for the manufacture of artificial joint prosthesis. Traditional artificial joints are mostly made of cast titanium alloy, with a smooth surface, poor integration effect with human skeleton, and easy to cause loosening, infection and other problems. Powder metallurgy adopts the "titanium alloy powder + porous sintering" process, which can make the surface of the prosthesis into a porosity of 30%-50% and a pore diameter of 50-50. The porous structure of 0μm is highly similar to the trabecular structure of human bones, which can make human bone cells grow smoothly into the prosthesis, realize "bone fusion", and greatly improve the stability of the prosthesis. According to the data of an orthopedic medical device enterprise, after using powder metallurgy porous titanium alloy hip prosthesis, the patient's 5-year postoperative prosthesis loosening rate was reduced from 15% to less than 3%, and the postoperative recovery time was shortened by 20%.In addition, powder metallurgy can also realize the personalized customization of the prosthesis, obtain the patient's bone data through CT scanning, and use metal 3D printing (an extension technology of powder metallurgy) to make a prosthesis that exactly matches the patient's bone, so as to avoid the problem that the traditional standardized prosthesis does not fit the bone.

In the field of dental medicine, powder metallurgy brings performance innovation to dental implants. Dental implants need to withstand chewing pressure in the mouth for a long time and resist saliva corrosion. Traditional stainless steel implants are prone to corrosion, darkening of the gums and other problems, while the implants manufactured by powder metallurgy using the "pure titanium powder + hot pressing sintering" process have a density of more than 99.5%, and the surface is sprayed Sand and acid erosion treatment form a rough structure, which not only has excellent corrosion resistance (in the oral cavityThe service life in the environment is more than 20 years), and it can quickly combine with the alveolar bone, and the implantation success rate can be improved to more than 98%. At the same time, powder metallurgy can also manufacture dental restorations, such as porcelain tooth inner crowns. Through the "cobalt chromium alloy powder + injection molding" process, the precision molding of the inner crown can be realized. The thickness error is controlled at ±0.02mm, which is more suitable for teeth and more comfortable to wear.

In addition to medical implants, powder metallurgy is also widely used in the manufacture of precision medical device components. The core component of the surgical robot, the micro-transmission gear, needs to have high precision, low noise and high wear resistance. The traditional cutting process is difficult to meet the requirements, while powder metallurgy adopts the "stainless steel powder + precision pressing molding + low-temperature sintering" process, which can produce a module of 0.1. The micro gear with an accuracy level of level 6 has an operating noise of less than 40 decibels, and the wear resistance is 2 times higher than that of traditional gears, ensuring the accuracy and stability of the operation of surgical robots. In addition, the filter membrane support body of the hemodialysis machine, the micro pump body of the insulin pump and other parts are also manufactured by powder metallurgy technology, which not only meets the high-precision requirements of medical equipment, but also realizes the biocompatibility of materials.

From artificial joints that help patients rebuild limb function to medical device components that help precise surgery, powder metallurgy technology is constantly promoting the development of medical equipment in a more accurate, personalized, safer and more reliable direction with its unique advantages. In the future, with the progress of regenerative medicine and precision medicine, powder metallurgy will also make breakthroughs in tissue engineering stents, degradable medical implants and other fields, and make greater contributions to human health.