Combined device of accessory and shell-shaped appliance

The utility model provides a combined device of an accessory and a shell-shaped appliance, the accessory comprises a tooth accessory fixed on a tooth surface and a tooth model accessory fixed on a tooth model, and the tooth accessory is smaller than the tooth model accessory. The shell-shaped appliance is a cavity which is attached to and covers the surface of a dental cast fixed with a dental cast accessory and is used for accommodating the accessory and teeth, and the occlusal surface of the dental cast accessory forms occlusal contact with the jaw teeth in different degrees, so that the shell-shaped appliance can be enhanced to be in place by utilizing occlusal force; a gap exists between the accessory cavity of the shell-shaped appliance and the tooth accessory, the appliance has larger surface area and better elastic performance on the accessory part, expression of in-position and correction force can be enhanced, and in addition, the occlusal surface of the tooth model accessory can also be designed to