I am 21 years old. I just started the process of getting braces. I have got all 4 of my wisdom teeth removed in October and I am not sure if removing all 4 of my 1st premolars is necessary to fix my overbite. My orthodontist said that if not then the braces will push my teeth further out. I have seen 2 orthodontist and they both said that I do need to have at least 4 teeth extracted but they both gave different teeth to extract. Is this necessary, pictures below