Abstract:

Objective To explore the application value of 3D ⁃ printing（3DP）customized steel plate combined with proximal femoral nail antirotation（PFNA）for intertrochanteric fracture of femur（IFF）with commi⁃ nuted lateral wall. Methods A total of 108 patients with IFF with comminuted lateral wall who had been treated in our hospital from October 2018 to March 2021 were selected as research subjects. According to different treatment plans，they were divided into PFNA group（n = 52）and Unite group（n = 56）. The general data，surgical indica⁃ tors，Harris score，inflammatory factors，postoperative complications，and degree of satisfaction were compared and analyzed between the two groups. The random walk model was used to evaluate the improvement in surgical indicators，postoperative hip function and inflammatory factors in both groups. Results As compared with PFNA group，Unite group had shorter fracture healing and ambulation time（P < 0.05）. As compared with PFNA group， unite group had higher scores on pain，function，deformity，and joint range of motion and greater Harris total score 12 months after surgery（P < 0.05），and lower levels of tumor necrosis factor⁃α（TNF⁃α），interleukin⁃6（IL⁃6） and interleukin⁃1（IL⁃1）one month after surgery（P < 0.05）. The evaluation results of random walk model showed that the improvement in surgical indexes，postoperative hip function and inflammatory factors was significantly better in Unite group than in PFNA group. As compared with PFNA group，Unite group had a lower incidence of 12⁃month postoperative complications（P < 0.05）and higher degree of satisfaction（P < 0.05）. Conclusions For IFF patients with comminuted lateral wall，the improvement in surgical indicators，postoperative hip function and inflammatory factors was significantly better in Unite group than in PFNA group，and the incidence of 12⁃month postoperative complications was lower and the degree of satisfaction was higher.

Key words:

3D printing, proximal femoral nail antirotation, outer wall, femur, fracture ,