The 3D printing technology that started in the 1990s has been quietly integrated into the aerospace, automotive, food and other industrial fields, and its application in the medical field is more dazzling.
On December 13, 2014, Professor Liu Zhongjun, Director of Department of Orthopaedics, Peking University Third Hospital, said at the International Forum on 3D Printing Orthopaedic Applications of Peking University in 2014: “The application of 3D printing in orthopedics is a revolutionary technology worthy of expectation and in-depth study. Will bring a major breakthrough in the field of orthopedics."
The trauma of various patients in the patient's spine can be customized by the doctor. After the patient's vertebral body resection, print a vertebra that is completely consistent with the resected vertebral body, perfectly connected to the adjacent vertebrae. These scenes, which were originally only found in movies or science fiction, have gradually landed in the country and played a role in patients. At present, Beijing, Shanghai, Qingdao, Hangzhou and other first- and second-tier cities have begun to explore 3D printing in the medical field.
3D printing saves serious injured teenager
At the beginning of December 2014, a serious car accident occurred in Pingdu City, a subsidiary of Qingdao City, Shandong Province. In a car accident, a teenager under the age of 18 suffered a severe chest injury, resulting in the 8th thoracic spine fracture, the 7th and 8th thoracic spine dislocation, requiring immediate surgery. However, the situation of the injured allowed the attending doctor to hesitate to make repeated determinations: if the operation is not timely, it will cause irreparable sequelae, but it will lead to death and death. And if the spinal cord is accidentally injured during the operation, it will also cause paralysis of both lower limbs.
The doctor finally decided to urgently refer the injured person to the affiliated hospital of Qingdao University. After receiving the consultation, Ma Xuexiao, deputy director of the Department of Spinal Surgery, Affiliated Hospital of Qingdao University, firstly printed the juvenile thoracic spine in proportion through the MIMICS computer-assisted surgical technique and rapid prototyping 3D printing technology introduced from the United States, and found a possible fracture of the spinal cord on the model. After the experiment explores the position and angle of the nail, the nail path is printed with a guide plate that perfectly matches the patient's spine structure. During the operation, Ma Xuexiao placed the guide plate on the patient's spine, and used the nail insertion hole reserved on the guide plate to accurately select the entry point, and easily completed the spinal fixation operation.
On December 16th, Ma Xuexiao and his assistants completed an operation for cervical spine surgery in which a tumor in the spinal canal was removed for an 82-year-old man. Previously, such a procedure would make the patient a vegetative person.
Ma Xuexiao told the author that in traditional spinal surgery, X-ray film and CT, MRI and other two-dimensional imaging techniques are mainly used for preoperative preparation. It is impossible to display the lesions in all directions. "Doctors with rich clinical experience are also inevitably operating mistakes in complex situations, and are prone to complications such as spinal nerve injury and paraplegia." The reason why he was so bold and bold was because of the powerful assistance of individualized 3D printed guides. . The whole process is like driving according to the navigation function of GPS, but the accuracy is not added. Ma Xuexiao believes that the application of 3D printing medical technology in spinal surgery is the biggest gospel of patients.
It is understood that this set of the most advanced international MIMICS computer-assisted surgical technology and rapid prototyping 3D printing technology was introduced in July 2014 by Ma Xuexiao during the post-doctoral study in the United States for the affiliated hospital of Qingdao University. The system uses MIMICS software to collect and process the patient's CT data, create a three-dimensional model in the computer, stereoscopically and accurately display the lesion and surrounding tissue, design the surgical plan accordingly, and complete the virtual surgery on the 3D model. Then, using 3D printing technology, the full simulation model of the patient's lesion is printed in equal proportions, and detailed surgical rehearsal is performed on the model.
Artificial vertebral body implanted into the spine
Not coincidentally, not long ago, the First Affiliated Hospital of Zhejiang University successfully completed the first domestic surgery to apply 3D printing technology to the treatment of multi-segment of the spine.
A 21-year-old female in Hangzhou has had a very severe chest pain in recent times. She went to the First Affiliated Hospital of Zhejiang University and learned that she had ossifying fibroids. The thoracic vertebrae in Sections 10 and 11 have already been apparent. The destruction occurred and pathological fractures occurred.
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