18 notice correspondence from the FDA.The correspondence accused the company of failing to comply with federal necessities to show up serious area possessions associated with remedial diplomacy. It cited several unwearied complaints on the subject of allergic reactions to the Invisalign trays such seeing that distended lips and say ulcers.head of the company Thomas Prescott told the San Jose Mercury News to facilitate the surface sound effects partake of merely affected a unimportant percentage of its 1.3 million patients. The company says it has replied to the FDA to resolve the theme.