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In a classical style courtyard in Deji Lane, Jiangbei District, several 3D printers at the Ningbo Institute of Intelligent 3D Printing Medical Applications are working tirelessly. As the print head moves back and forth, a 50-year-old fractured man's pelvic model begins to take shape, and the size and dislocation of a broken bone are clearly visible. The model will be sent to the hospital to help doctors develop an operation plan and be used to communicate with the patient's family before surgery.
From the preparation of medical 3D models to the preparation of surgical rehearsals, to the manufacture of catheters for assisted operation in orthopedic surgery, and to the printing of human implant materials, 3D printing technology is now increasingly used in the medical field and has become a good helper for surgeons. Recently, the Ningbo 3D Printing and Orthopaedic Surgeon Alliance was established. Several industry, scientific research, clinical experts and many Ningbo surgeons are working together to reduce the pain for patients using digital 3D printing technology.
Site: Complex fractures can be misplaced and printed at a glance
It takes 3.5 hours to print a cervical spine model with glass fiber; print an osteotomy guide with nylon powder for 3 hours; print a mandibular model with titanium alloy for 12 hours... Ningbo Institute of Intelligent 3D Printing Medical Applications was established. In 1 year, many Ningbo surgeons have provided reference and help.
The afternoon before yesterday, the reporter came to the laboratory of this institute and saw a few 3D printers of different sizes working non-stop. In a black 3D printer, the pelvis model is being printed on a roll of fiberglass yarn. A pelvis model that has been fragmented into dozens of pieces on one side has begun to take shape. Next to a printer, a cheekbones model was printed, and the joints of the patella were broken into pieces.
According to reports, this pelvic model is based on a 1:1 ratio to simulate the actual injury of an inpatient. The patient, who is 50 years old this year, was admitted to the sixth hospital because of a pelvic comminuted fracture. Because there are too many broken bone fragments, and most of them have been dislocated and displaced, it is difficult for the surgical repair.
According to the previous surgical procedures, doctors can only imagine the position and relationship of the patient's pelvic bone fragments through imaging data and formulate surgical plans. Because the situation imagined by the doctor and the actual situation seen during surgery are often somewhat different, the steps such as pre-bending of the steel plate must be performed after the actual fracture of the patient is seen during the operation. It will take time to adjust the angle and position of the steel plate during the operation. A lot of time. With 3D printing today, doctors can provide patients with CT imaging data to allow technicians to print patient pelvis models in advance.
"Tomorrow, this printed pelvic model will be sent to the Orthopaedic Surgeon of the six hospitals in the city." Fang Wei, director of the Ningbo Institute of Intelligent 3D Printing Medical Applications, introduced that an orthopedic surgeon can adjust in advance according to this pelvic model. Fix the position and curvature of the steel plate and save the operation time. Since the establishment of the institute, hundreds of medical models have been printed for clinical surgeons in Ningbo.
Application: In addition to the print model, it can also print teeth, surgical guides
At present, 3D printing technology assists in precision surgical treatment, and can print medical 3D models, surgical guides or catheters, tissues and organs, etc., which can achieve the purpose of visual design, minimally invasive operation, individual reconstruction and precise treatment.
This reporter learned that several years ago, major hospitals in Ningbo began to use medical 3D printing technology for clinical services. Ningbo No. 2 Hospital began using two years ago, using 3D scanning, digital modeling and 3D printing technology to print crowns for patients, allowing patients to shorten the wait time, achieve the day of treatment, wearing porcelain crowns on the day, the current technology Has served more than 1,000 patients.
Medical 3D printing technology Nowadays the most widely used clinical application in Ningbo is the printing of medical 3D models and orthopaedic surgical guides.
Ningbo No. 6 Hospital began using 3D printing technology for orthopedic surgery in 2013. Hu Yong, chief physician of the Spine Surgery Department of the hospital, introduced that in some complicated operations, the individualized tissue structure of the patient can be visually reproduced through the medical 3D model. The doctor can perform the surgery rehearsal, improve the quality of the surgery, reduce the risk of surgery, and can also perform surgery. Planning to save operating time.
"Similar to a spinal surgery, planning in advance through a medical 3D model can save surgery time from half an hour to one hour. The number of fluoroscopy in the operation is reduced from 4-5 to 1-2 times for the patient and Medical staff have benefits,†said Hu Yong. The 3D-printed surgical guides can play a practical role in surgery. For example, the spine of the human body is irregular, and steel nails are used on the spine. If the positioning is inaccurate, it is difficult to play a fixed role. If the model of the patient's spine is prepared well in advance and the catheter or guide plate for locating the steel nail is prepared in advance, the doctor can use the catheter to drill the steel nail along the guide tube, or follow the guide plate to cut the knife, which is accurate and efficient. The use of 3D-printed medical surgical models and surgical catheters in spine surgery has been successful in dozens of cases.
Outlook: 3D Printing Absorbable Steel Plates Under Development
In addition to being able to print materials that can be implanted in the human body, medical 3D printing can also print out organs and tissues.
At the inauguration conference of the Ningbo 3D Printing Orthopaedic Surgeon Federation, Xi Guoxian, Dean of the Xijing Orthopaedic Hospital of the Fourth Military Medical University, shared many cutting-edge technologies for medical 3D printing. In hospitals in Beijing and Shanghai, medical 3D printing technology has been used to print out human bones and bone joints, replacing patients with necrotic bones. High-precision 3D printed bone joints can not only achieve the purpose of customization, but also can realistically print out the bone trabecular structure of the skeleton. After being replaced into the human body, the blood and tissues in the normal human bone can follow the trabecular space Growing and wrapping artificial joints is more conducive to blending with human tissue and achieving ideal implantability.
The Ningbo Institute of Intelligent 3D Printing Medical Applications is also conducting a disruptive research project to develop an absorbable implanted steel plate. Once successful, this research result will bring great changes to orthopedic surgery.
“The current steel plates used in orthopaedic surgery are made of metal materials. After the bones grow well, the patient must also undergo a dismantling of the plate. With the resorbable implanted plate, the patient does not need a second operation.†This technology was jointly developed by the Ningbo Institute of Intelligent 3D Printing Medical Applications and the University of Nottingham Ningbo, Ningbo, and the No. 6 Hospital of Ningbo. The raw material was made of poly-lactic acid and corn fiber. After being implanted in the human body, the steel plate can be completely degraded into water and carbon dioxide and absorbed by the body. Researchers hope that by adjusting the formula, according to the fracture healing time, the precise control of the steel plate degradation time. If the results of this research are marketed and promoted, the burden on patients will be greatly reduced and patients will be relieved of their ailments.
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