Chinese Journal Of Clinical Anatomy ›› 2015, Vol. 33 ›› Issue (6): 700-705.doi: 10.13418/j.issn.1001-165x.2015.06.018

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Simulation study of total knee arthroplasty assisted by digital navigation templates 

GAN Yu-dong1,DING Jing1,HOU Chun-lin2,LU Sheng1,XU Yong-qing1   

  1. 1.The Affliated Orthopedics Hospital of Kunming General Hospital of Chengdu Military Region, Kunming 650032, China; 2.Department of Orthopedic, Changzheng Hospital, The Second Military Medical University, Shanghai 20003, China
  • Received:2015-03-24 Online:2015-11-25 Published:2015-12-18

Abstract:

Objective To investigate the accuracy and feasibility of total knee arthroplasty assisted by the navigation templates in clinic.   Methods   Twenty patients (8 male, 12 female) with knee arthritis requiring arthroplasty were recruited. Volumetric MRI scan was performed on each desired lower limb and a 3D reconstruction model was generated from the scan data. Using reverse engineering technique, anavigational template is designed with a surface that matches the distal femur and proximal tibia. The templatewas manufactured using rapid prototyping technique for clinical use. The operation was designed by the same doctor with experience in joint replacement. The compatibility of the navigation template with tibial and femoral condyles was examined preoperatively. After surgery, the positions of the prosthesis were evaluated using CT scan.    Results    Each navigational template was found to fit its corresponding biomodel appropriately, and there was no significant free motion of the template. All the cut surfaces were nearly perpendicular to the mechanical alignment, the rotating axis was located accurately and resection of posterior surface was parallel to the transepicondylar axis.  Conclusion   Total knee replacement assisted digital navigation template is safe and feasible, simple in operation, and accurate in osteotomy

Key words: Knee, Arthroplasty, Navigation templates, Computer aided design, Clinical application