Finite Element Analysis of Absorbable Sheath to Prevent Stress Shielding of Tibial Interlocking Intramedullary Nail

[摘要] The nail with absorbable sheath (AS nail) is designed to reduce the stress shielding effect of internal fixation with interlocking intramedullary nail. In order to verify its feasibility, two types of the finite element models of internal fixation of tibia with the AS nail and the common metal nail (CM nail) are established using the Softwares of Mimics, Geomagic, SolidWorks and ANSYS according to the CT scanning data of tibia. The result of the finite element analysis shows that the AS nail has great advantages compared with the CM nail in reducing the stress shielding effect in different periods of fracture healing. The conclusion is that the AS nail can realize the static fixation to the dynamic fixation from the early to the later automatically to shorten the time of fracture healing, which also provides a new technique to the interlocking intramedullary nail.

[发布机构] Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System, School of Mechanical Engineering, Tianjin University of Technology, Tianjin; 300384, China^1;Dept of Orthopaedics, Fourth Central Hospital of Tianjin, Tianjin; 300140, China^2;Tianjin University of Traditional Chinese Medicine, Tianjin; 300314, China^3;Dept of Orthopaedics, Tianjin Medical University, Tianjin; 300314, China^4

[效力级别] 无线电电子学

[关键词] Common metals;CT scanning;Fracture healing;Geomagic;Internal fixation;Intramedullary nails;SolidWorks;Stress shielding