Related Experiment Video
Updated: Jun 6, 2026
A Minimally Invasive Model to Analyze Endochondral Fracture Healing in Mice Under Standardized Biomechanical Conditions
Published on: March 22, 2018
[Three-dimensional finite element analysis of biomechanical characteristics of cancellous screw in different bone
Chong Tian1, Mei-chao Zhang, Jun Ouyang
1Department of Anatomy, Southern Medical University, Guangdong Provincial Medical Biomechanical Key Laboratory Guangdong, Guangzhou 510515, China. tianchong1985@yahoo.cn
Objective:
To predict the cancellous screw stress distributions and pull-out strength in cancellous bone with different densities using 3-D finite element analysis and provide biomechanical evidence for screw implant in clinical practices.
Methods:
Three-dimensional models of bones with low, medium and high bone density and a fixation screw were generated in Solidworks. Finite element analysis was performed after importing these models to Abaqus to simulate the pull- out process.
Results:
Stress concentrated both at the surfaces where major diameter of the screw connected the bone and at the proximal half angle of the 3 proximal screw threads. Maximum Von Mises stress of the threads decreased along the long axis of the screw. The pull-out strengths of the cancellous screw were 208.9 N, 431.45 N, and 648.80 N in low, medium and high bone density, respectively.
Conclusion:
During the pull-out process of cancellous screw, stress concentrates at the proximal end of the screw and the pull-out strengths are proportional to the cancellous bone density.
