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Updated: May 22, 2026
06:51
A 3-D Visualization Technique for Bone Remodeling in a Suture Expansion Mouse Model
Published on: August 18, 2023
Stress distribution inside bone after suture anchor insertion: simulation using a three-dimensional finite element
Hirotaka Sano1, Atsushi Takahashi, Daisuke Chiba
1Department of Orthopaedic Surgery, School of Medicine, Tohoku University, 1-1, Seiryo-machi, Aobaku, Sendai, 980-8574, Japan. sanohirotaka@med.tohoku.ac.jp
Summary
Suture anchor insertion angle impacts bone stress. A 90° insertion may reduce stress concentration, potentially preventing early anchor failure compared to a 45° angle.
Area of Science:
- Biomechanics
- Orthopedic Surgery
- Biomaterials Engineering
Background:
- Suture anchors are crucial for orthopedic repairs.
- Understanding stress distribution around anchors is vital for surgical success.
- Finite element analysis (FEA) is a powerful tool for simulating biomechanical behavior.
Purpose of the Study:
- To investigate stress distribution patterns in bone around suture anchors.
- To compare stress concentrations at different anchor insertion angles (45° vs. 90°).
- To evaluate the influence of varying traction angles on anchor-bone stress.
Main Methods:
- A three-dimensional finite element (FE) model of bone was created.
- Virtual suture anchors were inserted at 45° and 90°.
- A 100 N traction force was applied at angles from 15° to 90°.
- Von Mises equivalent stress was calculated and compared between insertion settings.
Main Results:
- Stress concentrated around proximal anchor threads, especially on the traction side.
- For 90° insertion, stress decreased as traction angle increased.
- Lower equivalent stress was observed with 45° insertion at 15° and 90° traction angles.
- Conversely, 90° insertion showed lower stress at 30°-60° traction angles.
Conclusions:
- A 90° suture anchor insertion may reduce proximal thread stress concentration.
- This insertion angle may offer lower equivalent stress in the 30°-60° traction range.
- Optimizing insertion angle could mitigate early postoperative anchor failure.
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