Injury to the parotid duct is commonly missed which may lead to a fistula subsequently. an external duct fistula is distressing to the patient because of continuous dribble of saliva during mastication. management of established duct fistula is controversial with a variety of methods both conservative and operative being reported in the literature. each having varying degrees of success. https://foldlyers.shop/product-category/led-power-supplies/