The malignant tumor grows on the spine of the patient, and the spine of up to 5 knots must be removed, and the artificial spine is placed after the resection. Peking University Third Hospital announced yesterday that the world's first metal 3D printing custom 19 cm artificial spine implant was successfully completed. This also marks the official opening of the artificial vertebral body in China's 3D printing technology.
At 8 o'clock on June 12, in the orthopedic ward of the Third Hospital of Beijing Medical University, Mr. Yuan looked forward to nervously lying on the surgical pick-up car, waiting for the special surgery to begin. Mr. Yuan suffers from chordoma, a malignant tumor that mainly grows on the thoracic and lumbar spine. At this time, the cancer cells have eroded his thoracic vertebra 10, 11, 12 and lumbar vertebrae 1, 2 knots, a total of 5 spines. For this rare and difficult case, there is no other way than to remove the tumor by surgery. But even if the 5 spines are successfully removed, what can be used to support the spine, reconstruct the spinal cord and nerves, blood vessels and other important structures in the spinal canal to maintain their physiological functions?
According to the surgical plan developed by the treatment team, the world's first metal 3D printed multi-segment thoracolumbar implant will complete a 19-cm long-span support on Mr. Yuan's spine to replace the 5 sections that have been completely removed. Spine. Professor Liu Zhongjun, the chief surgeon of Mr. Yuan, said that in the past, titanium mesh filled with autologous or allogeneic bone was the most commonly used equipment for interbody support. After the filled bones and adjacent bones grow together, bone fusion can be achieved. Reconstruction of stable structures. However, it is unrealistic to achieve a 19-cm long-span support in this way, and once the titanium mesh is displaced, it may also compress the spinal cord, causing paralysis of the patient. Moreover, the physiological curve of the cylindrical titanium mesh and the spine "S" shape does not match.
In May of this year, the State Food and Drug Administration approved the registration of China's first metal 3D printed human implant - artificial vertebral body. This kind of product belongs to the three types of orthopedic implants directly implanted into the human body. It is the medical instrument with the highest supervision level in China. The leading research and development institution is the orthopedic team of the North Medical Third Hospital. In 2015, the team developed a 3D printed artificial hip joint product. At present, there are only two approved 3D printed human implant products in China.
As the person in charge of the 3D printed artificial vertebral body research team, Liu Zhongjun decided to implant the artificial vertebral body for him after comprehensively studying Mr. Yuan's condition. "We use metal 3D printing technology to create an artificial vertebral body similar to his 5-spine spine shape and length according to the patient's anatomy." Liu Zhongjun said that the special feature of the artificial vertebral body is that it can be made into a sponge-like micro. The pore structure is similar to the trabecular bone in the human bone. With this "trabecular bone", bone cells in adjacent normal vertebrae can grow into it, ultimately achieving bone fusion.
This type of surgery has no precedent at home and abroad and is extremely difficult.
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