How is that possible to move my front 2 teeth outward or to normal position before getting my braces?

I'm planning on getting braces and when i spoke to my dentist he had informed me that my front two teeth are moving inward and that before we start the procedure of getting my braces done he will first have to move my front 2 teeth outward so that he could then put the braces and bring them into the right position. but my main concern is how would be bring them forward ?