China News, Guangzhou, June 12 (Tang Guijiang, Peng Fengmei, Zhou Jingting) The reporter learned from the Southern Medical University Integrated Traditional and Western Medicine Hospital on the 12th that the hospital recently applied 3D printing technology to assist a patient with left traumatic femoral head necrosis successfully implemented "left The artificial total hip replacement surgery relieved the patient's pain for more than 20 years and helped him return to normal walking.

  In a car accident 26 years ago, the patient Auntie Zou (a pseudonym) experienced multiple traumas to her body, including comminuted pelvic acetabulum fractures, bladder rupture, and small intestine rupture... In addition to the scars on the body, the car accident There was secondary severe femoral head necrosis caused by surgery that year.

  For more than 20 years, Aunt Zou has been suffering from the pain caused by necrosis of the femoral head. Over the years, she has been unable to treat her in many top three hospitals. "When you can't bear the pain, you will take anti-inflammatory injections yourself to relieve a little pain." When the pain worsens and it is difficult to walk to sleep, Auntie Zou will give yourself an injection to relieve pain. In the past two years, Auntie Zou was unable to walk due to increased pain. Finally, he was introduced to Huang Gang, director of the Department of Orthopedics and Traumatology, Southern Medical University Hospital of Integrated Traditional Chinese and Western Medicine.

Print out the 3D model based on CT data to achieve accurate replacement. Photo courtesy of Southern Medical University Hospital of Integrated Traditional Chinese and Western Medicine 

  After Aunt Zou came to the hospital, X-ray film and CT examination found that the left femoral head was necrotic and abnormally shaped, and had left the normal position, and it was difficult to find the true acetabulum. The left acetabulum was abnormally shaped and part of the bone was missing. To completely solve Auntie Zou's problem, a total left hip replacement is needed. However, Auntie Zou has been ill for more than 20 years and has a history of failed surgery. The difficulty of surgery is large, and there must be no deviation. If there is a slight deviation, the severe one can affect the surgical effect and leave sequelae.

  Director Huang Gang organized many discussions in the department and communicated with the patients and their families in a timely manner. He decided to rely on advanced 3D printing technology for preoperative planning for patients, accurate positioning of the true mortar, and tailor-made precision surgical treatment plans.

  Director Huang Gang first performed a CT scan for Aunt Zou, transmitted the CT scan data of Aunt Zou's double hip joint to a 3D printer, and "printed" an identical model of the hip joint with 3D technology at a 1:1 ratio. The model perfectly presents Aunt Zou's necrotic joints, dislocation and other details.

  With this model, Director Huang can "intuitively" understand the three-dimensional structure of Auntie Zou's skeletal lesions. In addition to helping to formulate a detailed surgical plan, he can also use the model to simulate preoperative osteotomy and fixation, and preview the entire surgical process in advance. Various difficulties that may occur during the complicated operation process, thereby improving the accuracy of the operation, and greatly reducing the operation time, reducing the operation risk and reducing the occurrence of complications.

  The operation lasted more than 2 hours and hemorrhage was 200ML. Aunt Zou successfully performed a total hip replacement on the left side. The artificial hip joint was accurately installed in Aunt Zou's true acetabulum and fixed firmly. Aunt Zou had walked down the ground on the fourth day after the operation.

  According to Director Huang Gang, the "personalized" treatment plan using 3D printing computer-assisted surgery is to use CT images, computer three-dimensional reconstruction, rapid prototyping to construct bone anatomical models and three-dimensional surgical design simulation technology, which can be observed from multiple perspectives before surgery to make the bones The anatomical structure can be displayed more completely, intuitively, and three-dimensionally, so as to accurately assess fractures, defects, etc., and understand the "personality" of the local anatomical structure.

  It is reported that this technology can provide a sufficient and intuitive basis for the selection of disease diagnosis, classification, fixation methods, etc., and provide clinicians with more intuitive and comprehensive preoperative planning and surgical simulation to maximize the treatment of difficult and complicated operations. Ability to reduce the surgical risk of patients is an accurate reflection of precision surgery. (Finish)