Objectives: The aim of this study was to develop a simplified device for orthodontic bone anchorage, and to assess bone stress distribution around these systems using the finite element analysis model. Methods: Initially, a one stage surgical device for orthodontic anchorage, with a commercially pure titanium self tapping mini-implant screw, was developed by the Center of study and research in implant dentistry (CEPID-Federal University of Santa Catarina-Brazil). The implant was designed by the CAD in a bone model and distinguished through a I-DEAS software. Subsequently, symmetry were applied (axsymmetric elements in 2-D, implying in a 3D structure for analysis), limiting conditions in the bone and a 5 N horizontal load by means of a ANSYS 6.1 software. After load application, the stress distribution was observed following the Von Misses failure criterion in this system. Results: The results demonstrated a greater concentration of stress only on the bone tissue adjacent to the mini-implant head. Conclusion: According to the qualitative results analyzed, the mini-implant developed, presented biomechanical characteristics favorable for supporting deleterious orthodontic loads.

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