This study evaluated the influence of angulation and material composition on the stress distribution and displacement of mini-screws placed in the retromolar pad area using finite element analysis; these mini-screws inserted in the retromolar pad area were referred to as MRM. A 3D mandible model was generated from CT scan data using Mimics and 3-Matic software, while the mini-screw was modelled in AutoCAD. Finite element analysis was performed with Inventor Professional software. A 2 N force, parallel to the occlusal reference line (ORL), was applied to MRM at insertion angles of 0°, 15°, 30°, 45°, and 60° relative to the ORL. Three MRM materials were analysed: stainless steel (SS), titanium alloy (Ti-6Al-4V), and pure titanium (Ti). Results revealed that the lowest Von Mises stresses occurred at a 0° insertion angle, while the highest stresses were observed at 60°. Stress levels were comparable across materials at 0°, 15°, and 30°, but SS MRM generated higher stresses than titanium materials at 45° and 60°. Displacement analysis indicated that SS MRM had the lowest displacement, while Ti MRM exhibited the highest across all angles. Importantly, all stress values remained below the
📖 افتح في inklap 🔗 DOI 📮 اطلب بحثاً