General stomatology is dental care, including orthodontics. Orthodontics doesn't need any tertiary hospitals, and it can be done in general stomatological hospitals, with no risk. It takes a long time to correct it, at least one year. Of course, the materials used are different. If the material is good, the price will be high; if the material is poor, the price will be low. And tighten the fixed floss every month.

Cheap 1000, but not recommended. It's all old-fashioned materials, and it's very troublesome to tighten the thread every time. There are more than 3,000 kinds, and many people do it. It is very convenient and beautiful to carry.