Miniscrews are temporary anchorage devices (TADs) which are widely used for orthodontics displacements aims. Miniscrews are used to anchorage teeth and causing orthodontics movements including space closure, space open, open bite treatment and uprighting of posterior teeth. Miniscrew loosening is a common problem, which usually occurs at the first two weeks during treatment. When the screw loses the primary stability, failure is normally due to loosening. Macrodesign can affect stability of miniscrew by changing in diameter, length, thread pitch, thread shape, tapering angle, etc. The purpose of the present study is to design an ergonomic miniscrew by considering economical benefits and better properties than minisrews have gained popularity such as Jeil. Screw, cortical and spongy bones were modeled in the Catia Part/Assembly design software. Then they were imported to the Abaqus/CAE. Forces and boundary conditions (BCs) were applied too. In this study a 3-D finite element analysis (FEA) has done to show the effect of thread pitch and thread shape variant on stress distribution pattern of the screw- cortical bone interface and maximum von Mises stresses. While orthodontics forces were applied, stresses were usually concentrated at the first involved thread of the screw, in contact by cortical bone. Cortical bone provided significant percentage of stability than trabecular bone against orthodontics forces by absorbing most of the stresses. Therefore spongy bone was removed from the FEA. The changes of maximum von Mises stresses were shown on the charts in the analysis of thread pitch and thread shape. The results showed that stresses decrease while thread pitch decreases but they enhance when thread pitch becomes less than a certain value. The results showed that the stresses increase when the apex angle of the thread decreases. Hence the buttress reverse thread is the favor thread shape to gain most pullout strength; we decreased the lower angle when the upper angle was fixed on 90 degrees in the means of stress decreasing. But no significant influence was seen. In each FEA the stresses were concentrated on the tip of the threads. But the pattern of stress distribution differed when the stresses were enhanced in the gained curve of the thread pitch analysis. The results are beneficial to design an ergonomic miniscrew. Based on the results, a new dual miniscrew is recommended. A dual thread miniscrew is a screw by two different pitches which interface cortical or spongy bone. After modeling, the results of the FEA showed that new design is better than Jeil design, under orthodontics forces and torque of implantation. Also the dual thread screw shows a signi?cant lower maximum insertion torque (MIT) than typical screws when the bone meets microthreads; which causes to reduce the risk of fracture significantly. But we should notice that excess helix angles for a faster insertion may jeopardize the ability of implants to transfer axial load. So we can design trapezoid shape of microthreads to protect triangular shape of spongy threads against vertical loads. All of these are the reasons to show that new model is more ergonomic than Jeil model. Cutting flute was another parameter which was studied in FEM. In the final step of design, patient satisfactory was considered too. Biometal selection based on biocompatibility properties was another section of the study. It is forecasted that the laboratory future tests will show positive results. Keywords: Miniscrew, Ergonomic design, TADs, FEA, MIT.