OBJECTIVE: By means of a photoelastic model. this study analyzed the stress caused on conventional and self-ligating brackets with expanded arch wires. METHOD: Standard brackets were adhered to artificial teeth and a photoelastic model was prepared using the Interlandi 19/12 diagram as base. Successive activations were made with 0. https://parisnaturalfoodes.shop/product-category/org-aloe-vera-juice-inner-fillet/