Orthodontics can be done, and the age is very suitable. In fact, the longer you do orthodontics, the better. A little orthodontics will do less harm to the teeth. In your case, almost one and a half years is enough. The cost is related to the materials you choose, ranging from thousands to tens of thousands. You can choose according to your own economic situation. In fact, if the teeth are not serious and have no effect on face shape and chewing, it is best not to do orthodontics. Orthodontics can do great harm to teeth. It will cause pulp necrosis, tooth looseness and sensitivity. If tooth extraction is needed, the cost will be higher. Only one tooth will not regenerate after tooth change, so protect your teeth.