3D movies make us feel more stereoscopic about film and television works. Nowadays, 3D printing has quietly entered people's lives. Small to stereo photos, toy cars, as large as Boeing airplanes, lunar bases, as long as the conditions are sufficient, they may be printed out by machine. In the medical field, researchers have made great breakthroughs in printing various organs of the body, and some 3D printing products have already brought convenience to patients. It can be said that the replacement of human organs with "life" in the future will no longer be a dream, and this technology will also make the medical market wider.
It’s not too late to start, but mainly to follow others
As the earliest expert who came into contact with this technology in China, Professor Dai Kejun, an academician of the Chinese Academy of Engineering and former dean of the Ninth People's Hospital affiliated to Shanghai Jiao Tong University School of Medicine, said that 3D printing was used abroad in the late 1980s, mainly used in In the aerospace field, the proportion of applications in medicine is only about 20% to 30%. Dai Kezhen and Shanghai Jiaotong University Wang Chengwei team used this technology for medical treatment in the late 1980s, but since the printers were imported from abroad, it was equivalent to we have been following others.
In 2011, Anthony Atala, a researcher at Wake Forest University in the United States, demonstrated the technology of 3D printed kidneys; researchers at Princeton University in the United States have been able to "print" artificial ears in 3D printers using bovine ear cells. Dai Kezhen said: "This technology combines tissue engineering technology. At present, this 'printed' human structure or tissue, although having a shape or partial mechanical properties, does not have metabolism, urinary, hematopoietic, detoxification. Such physiological functions can not replace the role of organs. The truly printable organs for the benefit of patients will be the most ideal development direction for 3D printing in the future."
Although the current 3D printing technology does not reach the height of "organ transplantation", researchers have not stopped for more than 10 years. Dai Kezhen told reporters that since the 1980s, Chinese doctors have begun to apply this technology in orthopedics because it is relatively easy to use in this field. The bones serve primarily as a support and form joints that can replace the function of a "segment" of bone or joint with 3D printing technology. Chinese doctors have been able to apply this technology to create a model that is exactly the same as the diseased bone. Doctors can perform simulated surgery on the model, design and manufacture the prosthesis, and perform simulation installation and correction to produce a precise individualized prosthesis.
Print out the spine in ten hours
Since 2009, the Department of Orthopaedics, Peking University Third Hospital has taken the lead in researching bones using 3D printed metal materials. The leader of the study, Liu Zhongjun, director of the Department of Orthopaedics, Peking University Third Hospital, told reporters that the bone printing process is not complicated, mainly including first inputting the design graphic into the computer, then injecting the metal powder into the machine, melting, forming, solidifying and cooling at high temperature. For example, if a hospital needs to print a spine, it will send the design to the manufacturer, and the product will be available in as early as ten hours.
After four years of hard work, the team led by Liu Zhongjun has developed more than a dozen 3D printed spinal surgery implants in the field of spine and joint surgery, including cervical interbody fusion cage, cervical artificial vertebral body and artificial acetabular joint. It is nearing completion of the clinical observation phase and preparing for product declaration. Liu Zhongjun said that the majority of patients who participated in human trials were cervical spondylosis and hip joint disease. More than 60 patients have implanted 3D printed bones after signing the informed consent form. They underwent spinal artificial vertebral body implantation, cervical interbody fusion cage implantation and artificial acetabular implantation. The current results are optimistic, and in a short period of time, it can be seen that bone cells have grown into the pores of the printed bones.
For the current application of 3D printing technology in orthopedics, Dai Kezhen said: "If needed, we can now customize all the joints and bones of the limbs to create a personalized prosthesis." Currently, the most used Dykes team is for patients with pelvic tumors. The prosthesis is made to repair the large pelvic defect left by the tumor resection and to reconstruct the patient's standing and walking functions. It is understood that hundreds of patients have now made individualized bone and joint repair prostheses with different parts with the help of 3D printing technology, and have achieved success.
Nowadays, in domestic hospitals, in addition to orthopedics, 3D printing technology also assists plastic surgery, dental, ophthalmology doctors to make plastic models, when repairing the skull, trimming the chin, reshaping the tibia, eyelids, etc. Come in handy.
Traffic Arrow Board,Vehicle Mounted Arrow Board,Truck Arrow Board Led,Arrow Board Traffic Light
Shenzhen Wide Way Optoelectronics Co., Ltd. , https://www.wdmtrafficlight.com