Orthodontics is a scientific art aiming to achieve the individual aesthetic optimum and functional development and dento-maxilo-facial. with the help of an assembly of biological and mechanical means (Chateau. 1975). Symmetry is indisputably of numerical order and it is essential in relation to a central axis in the transverse direction. https://fitnessgravesyardes.shop/product-category/turner-signal-wire/