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Will I have a lisp?

Your mouth is a sensitive place, and anything new inside your mouth will take a little adjustment. Your instasmile may cause a slight lisp when first worn. This is not permanent, and it’s worth remembering that even fixed veneers cause a lisp when they are first fitted. Usually an instasmile lisp will be gone after 72 hours. The more you wear and talk in them, the faster you’ll become accustomed to them.