Evaluation of Stress in Upper Jaw Caused By Orthodontic Mini-Screws (Oms) Produced From Different Biomaterials Using 3 Dimensional Finite Element Analyse

Objective: The purpose of this study was to evaluate the stress in upper jaw caused by orthodontic mini -screw produced from different biomaterials using 3 dimensional finite element analyse. Materials and Method:For this purpose, there were constructed 4 different scenarios (stainless steel, Ti6Al4V, TiZr and Zr orthodontic mini screw biomaterials) without changing the treatment mechanic and orthodontic screw dimensions.The scenario was constructed on a premolar extraction case, in upper jaw; the canine tooth retraction was performed on a continuous arch (0,016 x 0,022 stainless steel) using 0.0018'' slot brackets and the orthodontic mini screw (OMS) was placed between second premolar and the first molar tooth.The canine retraction has been realized by hanging a closed coil from the hook of the brace to OMS, which applied a force of 1 N. Results and Conclusion:According to the results; maximum principal stress (Pmax) values recorded at the cortical bone, starting from the smallest, were respectively stainless steel, Zr TiZr, and Ti6Al4V; maximum principal stress (Pmax) values recorded at the cancellous bone, from the smaller, respectively is found as following: stainless steel, Zr, TiZr, and Ti6Al4V.