Titanium Alloy Gamma Nail versus Biodegradable Magnesium Alloy Bionic Gamma Nail for Treating Intertrochanteric Fractures: A Finite Element Analysis

• DOI: 10.1111/os.12973
• Publication Date: 2021-06-02T12:17:55Z
• Authors: Ming Li; Kuo Zhao; Kai Ding; Yun‐wei Cui; Xiao‐dong Cheng; Wei‐jie Yang; Zhi‐yong Hou; Ying‐ze Zhang; Wei Chen; Pan Hu; Yan‐bin Zhu
• Keywords: Trabecular bone; Orthopedic surgery; Adult; Male; Titanium; Hip Fractures; Finite Element Analysis; Finite element analysis; Bone Nails; Prosthesis Design; Fracture Fixation, Intramedullary; Intertrochanteric fracture; 03 medical and health sciences; 0302 clinical medicine; Gamma nail; Clinical Articles; Alloys; Cadaver; Humans; Magnesium; Bionic internal fixation; RD701-811

Objective To using finite element analysis to investigate the effects of traditional titanium alloy Gamma nail and a biodegradable magnesium bionic for treating intertrochanteric fractures. Methods Computed tomography images an adult male volunteer appropriate age in good physical condition were used establish three‐dimensional model proximal femur. Then, type 31A1 fracture femur was established, nails fixation, respectively. The von Mises stress, maximum principal minimum stress calculated evaluate effect bone ingrowth on distribution after fixation. Results In intact model, 5.8 MPa, −11.7 11.4 MPa. cancellous appears position consistent with growth direction secondary tensile zones. After healing, 32 −23.5 31.3 concentration quite obvious compared model. It assumed that would biodegrade completely within 12 months postoperatively. 18.7 −12.6 14.0 For region value less than −10 MPa significantly improved models. Meanwhile, closer bone, which reduced implant. Conclusion implant can improve fractured close while reducing risk postoperative complications associated internal fixation techniques, it has promising clinical future.