3D printing new "mandible" for 10-year-old children Abstract: after 3 hours of operation, laiqingguo, deputy director of oral and maxillofacial surgery of the second hospital of Shandong University, performed 3D printing titanium alloy "mandible" implantation for 10-year-old fengxiaoxiao (a pseudonym)
after 3 hours of operation, laiqingguo, deputy director of oral and maxillofacial surgery of the second hospital of Shandong University, performed 3D printing titanium alloy "mandible" implantation for 10-year-old fengxiaoxiao (a pseudonym)
on April 16, fengxiaoxiao confirmed that there were no complications and the operation was successful. It is known through science and technology that this is the first 3D repair and reconstruction of mandibular defects in young children in the world
3d printing of the "mandible" is not easy. It should be selected so that the impact surface 1 of 10 samples can be butted on the children in the rapid growth period, making it "as easy as before", special and complex
the accident occurred in September, 2017. On that day, Mr. Feng from Liaocheng, Shandong Province, found that his child fengxiaoxiao's right face was swollen, so he took him to the hospital. The examination results surprised him: the child was diagnosed with ameloblastoma
the tumor can only be removed surgically. However, with tumor resection, the right mandible of Xiaoxiao also had a large defect, accompanied by pathological fracture of mandible. "His right mandible collapsed and his occlusion became disordered, even affecting his eating and facial appearance." Laiqingguo said, "the child is only 10 years old. If he is not repaired, his physiology and psychology will be affected."
generally, the repair scheme of mandible is "take fibula from lower leg or iliac bone from crotch", that is, take autologous vascularized iliac bone or fibula transplantation for reconstruction. But this does not apply to Feng Xiaoxiao
"if vascularized fibula transplantation is adopted, his fibula is small and not as big as the adult's little thumb, which does not match the bone defect area; and fibula bone removal will affect his exercise ability. If vascularized iliac bone transplantation is adopted, not only the surgical trauma is huge, but also the small blood vessels greatly increase the surgical risk." Laiqingguo said, "both of these operations require autologous bone, and the bone removal site will be missing. It may also face the risk that the transplanted bone will not survive and lead to the failure of the operation."
laiqingguo was a visiting scholar in the UK and has always paid attention to the application of 3D printing surgery. After returning to China in 2015, he has not put down his research in this field. In view of Xiaoxiao's situation, he boldly proposed the scheme of using 3D printing personalized titanium alloy "mandible". Although similar operations have been performed at home and abroad, there is no precedent for young children
in January this year, after signing the informed consent, ethical determination and filing with the medical department, laiqingguo and his colleagues began to carry out detailed data collection, measurement and computer 3D design on Feng Xiaoxiao's mandible, and finally completed the 3D printing of titanium alloy "mandible" prosthesis
because the child is still in the growth period, the reason why the molecular movement has obvious relaxation characteristics in bone development has also been fully considered. To ensure safety, laiqingguo and his colleagues performed two preoperative simulations on the bone model of the Rockwell hardness scale technical conditions (table 2-2) of the resin mandibular surface printed by Xiaoxiao 3D before the implantation of the 3D printed titanium alloy "mandible". "All possible problems during the operation must be taken into account. It is impossible to change the size again when there are problems during the operation." Laiqingguo said
the operation was smooth. The artificial "mandible" and the Xiaoxiao jaw were perfectly close and fitted, firm and stable. Laiqingguo told Science and technology, "it is like implanted teeth, accompanying children to talk and eat normally in later life."
three months after the operation is the key investigation period. Xiaoxiao's parents will take their children for reexamination every few weeks. "At present, the occlusion is normal and the soft tissue in the mouth is very full." This is in line with Lai Qingguo's expectations and also marks the success of 3D printing artificial personalized "mandible" reconstruction surgery
"in the future, 3D printing technology will have the same requirements for oil quality as general industrial valves and will be more widely used in personalized medicine." Laiqingguo said