I don't know about filling teeth. We usually see an orthodontist first, then X-ray our teeth and so on, and then the doctor asks us to take them out (it can be done in about one day). After pulling out your teeth, you will get braces about two weeks later, and usually go back once a month after getting braces. Adults usually wear braces for two years. In addition, in the first week after wearing braces, the teeth are usually uncomfortable, with foreign body sensation and some pain, especially when I wake up every morning, it is not convenient to eat, so I can't eat hard. When you first wear braces, you'd better drink some porridge or something. As for talking, can you talk, but what is certain is that speaking is affected, such as poor pronunciation and so on, especially if you have a toothache, you don't want to talk. It will ease in a week and get used to it.