Patriot told me about the dentist he goes to, so I went for a consultation. The dentist is good , but I don't have much information about other dentists, so I heard that Invisalign is 5.5 million won and there is no monthly fee . What do you think? Is it cheap? When I went there, I heard that ceramic braces cost 3 million won. The cost of tooth extraction, screws, and retainer costs are all added up to 3 million won. Should I just use ceramic braces?