Chinese Journal of Tissue Engineering Research ›› 2016, Vol. 20 ›› Issue (13): 1895-1903.doi: 10.3969/j.issn.2095-4344.2016.13.010

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Digital design of standard parts database for distal femoral fractures treated with plating via three-dimensional printing

Wu Chang-fu, Zheng Zu-gao, Chen Xuan-huang, Yu Zheng-xi, Zhang Guo-dong, Chen Xu, Lin Hai-bin, Wu Xian-wei, Gao Xiao-qiang   

  1. Department of Orthopedics, Affiliated Hospital of Putian University Teaching Hospital of Fujian Medical University; Affiliated Putian Hospital of Southern Medical University; Affiliated Hospital of Putian University, Putian 351100, Fujian Province, China
  • Received:2016-02-25 Online:2016-03-25 Published:2016-03-25
  • Contact: Chen Xuan-huang, Master, Associate chief physician, Department of Orthopedics, Affiliated Hospital of Putian University Teaching Hospital of Fujian Medical University; Affiliated Putian Hospital of Southern Medical University; Affiliated Hospital of Putian University, Putian 351100, Fujian Province, China
  • About author:Wu Chang-fu, Master, Physician, Department of Orthopedics, Affiliated Hospital of Putian University Teaching Hospital of Fujian Medical University; Affiliated Putian Hospital of Southern Medical University; Affiliated Hospital of Putian University, Putian 351100, Fujian Province, China
  • Supported by:

    the Natural Science Foundation of Fujian Province, No. 2015J01507; the Middle-Aged and Young Backbone Talents Training Project of Health and Family Planning Health Systems in Fujian Province, No. 2014-ZQN-JC-39; the Science and Technology Program of Putian City in Fujian Province, No. 2013S03(6); the Scientific Research Project of Putian University in Fujian Province, No. 2015044

Abstract:

BACKGROUND: On CT reconstruction of three-dimensional (3D) model, fracture virtual reduction and internal fixation cannot be achieved, and reasonable operation scheme cannot be formulated. Digital design can fully meet the needs of clinical orthopedics physicians. Standard parts database can provide the possibility to choose the ideal internal fixation. 3D printing makes the reasonable operation scheme accurate in clinical implementation.
OBJECTIVE: To discuss the feasibility, accuracy and minimal invasion of internal fixation in treatment of the distal femoral fracture with digital design of standard parts database by 3D printing.
METHODS: (1) Nine adult lower extremity specimens were selected to take continuously thin-layer CT scanning. After Dicom images were imported into the mimics software, the model was established. According to the AO classification, they were classified into A1-3, B1-3 and C1-3 types of distal femoral fracture by virtual design. Internal fixation with plate and screw formed standard parts database virtually. It was printed out the pilot hole of the navigation module design by three-dimensional printing forming technique. Plate and screw were inserted assisted by the module. X-ray and CT scan were taken postoperatively to access the position. (2) 30 patients with distal femoral fracture were subjected to above fixation. The operation time, intraoperative blood loss and postoperative drainage were recorded. Imaging and curative effects were evaluated during follow-up.
RESULTS AND CONCLUSION: (1) Nine samples underwent X-ray and CT scan. 3D reconstruction results revealed plate position, screw entry point, nail direction, length and diameter were consistent with presetting data in Mimics software. The navigation models were designed to fit the lateral bony structure of distal femur. There were good fitting degree, good card position and good stability when the navigation was applied. It could guide plant and screw implantation. (2) In 30 cases, the operation time was (104.63±26.12) minutes, intraoperative blood loss was (121.74±11.49) mL, and postoperative drainage volume was (30.29±6.38) mL. All patients were followed up. According to Schagzker criterion, the efficiency of 22 cases was excellent, 6 cases good and 2 cases average, and the excellent and good rate was 93%. The parameters of length, diameter, orientation and angle were consistent with that preoperatively. (3) Internal fixation formed by standard parts database assisted by 3D printing navigation model has advantages of high accuracy, short process, lessened blood loss, high safety, less complications, and precise fixation. Digital design of standard parts database via 3D printing navigation module is expected to achieve implant navigation and application. 
 中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱;骨折;内固定;数字化骨科;组织工程