TT transparent orthotic device is invisible, comfortable and sanitary, Convenient, effective, predictable, visible, time-saving, applicable to The tooth with defective enamel is not easy to absorb the root, which is suitable for Teeth with fillings or crowns, unobstructed Pronunciation, easy to control the vertical relationship. Transparent dental appliances can be used to treat deep mandible In this case, accidents rarely occur, and the movement of a single tooth can be controlled, Secondary treatment, replacement of fixed orthodontics, control Night grind teeth. At the same time, invisible dental appliances are applicable For special patient groups, early vision correction process and others Benefits.