Chinese experts take the lead in 3D printing of cervical vertebrae to help patients with cervical "regeneration"
Release date: 2017-08-03 Xiaowen, 28, smiles heartily and her neck is straight. In fact, her entire "neck" is a cervical titanium prosthesis printed with 3D technology. Professor Xiao Jianru's research and development team carried out the first 6-segment cervical resection for Xiaowen, a large chondrosarcoma of the cervical spine, and installed the first 3D printed artificial cervical vertebrae for the entire cervical vertebra to "regenerate" the cervical spine. Shanghai Changzheng Hospital revealed on the 27th that the Department of Bone Tumor Surgery (Long March Spinal Tumor Center) Professor Xiao Jianru's research and development team implemented the first 6-segment cervical resection for Xiaowen, a large chondrosarcoma of the cervical spine, and installed the first full for her. The 3D of the cervical vertebra prints the artificial cervical vertebrae, which causes the cervical spine to "regenerate". Complete resection of giant super-long segmental tumors and reconstruction of spinal stability has not been reported in the world. It is known that the Long March Spinal Tumor Center is the largest treatment center for spinal tumors in Asia. The successful implementation of this operation marks a solid step in the research and application of individualized 3D printed artificial vertebral bodies in the cervical spine in China. The hospital revealed that the patient was discharged from the hospital and recovered in good condition. The calm and happy life of Xiaowen, weighing 240 kilograms, was broken by a paper diagnosis book this year. According to reports, in the past three years, Xiao Wen often felt neck pain and numbness in the right upper limb, which did not affect life and did not attract attention. Until May of this year, Xiao Wen went to the local hospital because the right arm was weak and difficult to hold. After MRI, the doctor found that Xiaowen's neck 2 to neck 7 vertebral attachment and a large tumor in the paravertebral. Due to the huge size of the tumor and the special location, many large hospitals have declined due to the difficulty and risk of surgery. After many twists and turns, Xiaowen and his family came to Shanghai Changzheng Hospital to seek the help of Professor Xiao Jianru, Dean of the Orthopaedic Hospital and Director of the Spinal Tumor Center. According to the hospital, after the biopsy results, Xiaowen suffers from chondrosarcoma grade II, which is a malignant tumor that is very easy to relapse. Thoracic resection of the tumor by surgery is the key to treatment. "Although the tumor is huge and the operation is very difficult, it can still be removed. Let's work hard together!" Professor Xiao Jianru's words made the Xiaowen family, who suffered a lot, see the dawn of hope. Professor Xiao Jianru organized several consultations to comprehensively evaluate the patient's condition. He believed that the huge tumor wrapped around the right vertebral artery and cervical nerve root, combined with the special shape of the patient's overweight and fat neck, which increased the difficulty of surgery. At the same time, hemorrhage, A series of complications such as impaired cervical spinal nerve function, high paralysis and spontaneous breathing are also challenges for doctors. Professor Xiao Jianru pointed out that the reconstruction of the ultra-long segment of the cervical vertebral body (neck 2 - neck 7 vertebral body) requires a custom-matched super-long artificial vertebral body, but the existing internal fixation products at home and abroad cannot satisfy this. Reconstruction requirements for extra-long sections and special structural areas. Doctors face the challenges of a worldwide problem. Professor Xiao Jianru's team decided to use 3D technology innovatively to create a titanium alloy prosthesis instead of a completely resected whole cervical vertebral body. Before the operation, the doctors created a 14-cm stereoprecision full-cervical prosthesis according to the 1:1 3D printed reproduction model based on the latest imaging data after the patient's adjuvant treatment. Under the full cooperation of the anesthesiology department, the team of Xiao Jianru and Associate Professor Yang Xinghai successively carried out the surgery of the posterior approach and the anterior approach in two phases. After 13 hours of fighting, the doctors successfully removed a large tumor spanning 6 vertebral segments and performed a 3D printed full cervical artificial vertebroplasty. It is reported that after the operation, the patient did not have any complications. According to reports, compared with the previous artificial vertebral body, the 3D printed full cervical artificial vertebral body of this design has a spongy microporous structure, which is conducive to the fusion of the prosthesis and the adjacent bone surface; Bone hole, which facilitates allogeneic bone implantation and ultimately achieves biofusion. In addition, the shape of the prosthetic head also makes the reconstruction more stable. Professor Xiao Jianru pointed out that chondrosarcoma is a primary malignant tumor that is very easy to relapse. The thoroughness of the first surgical resection is particularly important. Patients with a wide range of tumors, further development of the disease may lead to high levels of paralysis, life-threatening. In this case, it is necessary to accurately design and print the individual according to the individualized physiological curvature of the patient. He said that the team has done a lot of trials and explorations in the design and application of long-segment spine 3D printed prostheses, and has accumulated rich experience and has already taken the lead in the international arena. Source: Zhongxin Net Multi Span Plastic Film Greenhouse Arch greenhouse is a kind of economical greenhouse, which is welcomed by the users with graceful curve form and low cost. It has beautiful appearance, fluent visual, reasonable structure and good performance for keep temperature. It is economical greenhouse because of its relatively low manufacturing cost. It can be applied in most areas of China. Double membrane greenhouse is used more in north of China, while single film greenhouse is used more in southern region. It can get maximum sunlight when visible light is within the scope of 0.4 to 0.7 microns and form a thick envelope, which can effectively prevent heat loss and prevent the invasion of cold air. 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