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  1. شبیه‌سازی مدل تثبیت شکستگی استخوان دیستال رادیوس به روش Lu clamp و بررسی تأثیر عوامل مؤثر بر سفتی تثبیت به کمک آنالیز المان محدود و انجام تست آزمایشگاهی برای حالت بهینه
شبیه‌سازی مدل تثبیت شکستگی استخوان دیستال رادیوس به روش Lu clamp و بررسی تأثیر عوامل مؤثر بر سفتی تثبیت به کمک آنالیز المان محدود و انجام تست آزمایشگاهی برای حالت بهینه
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شبیه‌سازی مدل تثبیت شکستگی استخوان دیستال رادیوس به روش Lu clamp و بررسی تأثیر عوامل مؤثر بر سفتی تثبیت به کمک آنالیز المان محدود و انجام تست آزمایشگاهی برای حالت بهینه

نادعلی جلوخانی، اسما Nadeali Jelokhani, Asma

Simulating the Fracture Fixation Model of Distal Radius Bone using Lu Clamp Method, Investigating the Effect of Influential Factors on the Fixation Stiffness using Finite Element Analysis, and Performing Laboratory Testing for Optimal Condition

Nadeali Jelokhani, Asma | 2026

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 58816 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Nourani, Amir
  7. Abstract:
  8. Distal radius fractures are among the most common upper limb injuries and require optimal stabilization methods. Although the use of K-wires is simple and cost-effective, it offers limited biomechanical rigidity. The novel Lu clamp technique, which involves bending and connecting the ends of the pins, has the potential to improve rigidity. This research investigates the biomechanics of this method and examines influential parameters, including preloading on the pins and their insertion angle. For this purpose, a model of the radius bone with a standard R3A2 fracture was developed, and the effects of connecting the pins, applying preload, and changing the insertion angle under linear and rotational loading were analyzed using finite element analysis. The system’s rigidity was calculated and compared through force-displacement and torque-rotation curves. The results showed that the pairwise connection of the pin ends did not significantly affect rigidity. However, directly connecting the pins to the proximal part of the bone increased rigidity by nearly 600% under loading along the Y-axis. Additionally, applying preload by inducing rotation around the Z-axis at the pin ends increased rigidity by up to 68% for loading along the X-axis, whereas preload applied through translation along the X-axis and rotation around the Y-axis reduced rigidity. The insertion angle of the pins also played a decisive role, particularly under rotational loading, with the configuration featuring the maximum insertion angle showing a remarkable increase in rigidity. Under rotational loading, changes in the angle of pins in group A had a greater effect on increasing rigidity. This study demonstrates that combining rigid connection to the proximal part of the bone, selecting optimal pin angles, and applying targeted preload can synergistically contribute to achieving maximum rigidity in stabilization systems
  9. Keywords:
  10. Numerical Simulation ; Fracture Fixation ; Finite Element Analysis ; K-Wire Method ; Fixation Rigidity ; Distal Radius Fracture ; Lu Clamp Method

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