Going to the dentist is everyone's worst nightmare. Yes, you're absolutely right; the noise and coldness of the instruments are not pleasant at all. You might think the doctor, wearing gloves and a mask, walking towards you in a white coat with his big eyes, looks like Frankenstein (though we can't quite agree with that).

Your smile plays a crucial role in your appearance, and the shape and color of your teeth play a crucial role in your smile. Let's illustrate this with an example. First, imagine someone smiling at you with crooked, yellow teeth, and hold that image there.