When you’re getting ready to speak in front of others – whether it’s for an important meeting at work or to make a speech at a special event – it’s important to remember that the little things can make all the difference. A great smile plays a more important role in a successful speech than you might realize. Here’s why it’s worth keeping your teeth in mind when you’re getting ready to speak in front of others! Teeth and Speech Your teeth play an important role in pronouncing all kinds of sounds.