This largely depends on which orthodontic appliance we use for your treatment. Braces placed on the outside of teeth won’t affect speech. Incognito braces placed on the inside surface of teeth will affect speech, as this is the same place the tongue presses against to produce certain sounds. How much change to speech is very difficult to predict however most people will find producing “S” sounds difficult for a week or so. Speech returns to normal, or close to normal, fairly quickly depending on how much you talk and practice producing certain sounds. Invisalign® aligners cover all tooth surfaces including the inside of the teeth. Due to being particularly slimline, any speech problems are quickly overcome.