Abstract Background Primary atrophic rhinitis (1ry AR) is a chronic nasal disease characterized by the loss of mucociliary clearance and presence of viscid secretions and dried crusts that causes a characteristic foul odor. usually bilateral. A large range of treatment modalities had been tried. yet there is still no agreement upon a curative treatment with long-lasting success. https://toyscyclers.shop/product-category/bicycle-helmets/