If the position of both sides is not enough, the method of pulling out the first pair of fangs (the fourth tooth) or the second pair of fangs (the fifth tooth) on one side is generally adopted. The dentist will make a full mouth model for you and an appliance based on the model of your teeth. There are two kinds of appliances, one is movable and the other is fixed. Movable ones are cheaper, but more troublesome. Fixed type is more expensive, but it doesn't have much foreign body feeling. Just brush your teeth and eat normally every day. Both of these appliances need to see a doctor regularly to apply force.