Abstract: A lockable orthodontic appliance, comprising a main body. An arch wire groove is formed on the main body, the main body is provided with a movable accessory, the accessory comprises a traction portion and a space occupying portion, the accessory can move between an available position and an unavailable position, and during the movement, the traction portion can drive the space occupying portion to enter the arch wire groove; or a traction member and a space occupying member are provided on the main body, the traction member can move, and during the movement, the traction member drives the space occupying member to enter the arch wire groove. The orthodontic appliance may have a plurality of states, the first is a locked state, the second is a traction state, the third is a traction locked state, and the fourth is a non-locked and non-traction state.

Abstract: An orthodontic appliance, includes a main body having an archwire groove and a movable part, and further includes a fixing structure for fixing the movable part at least in the closed position. The fixing structure includes an elastic member and a movable element which are located in one of the main body or the movable part. The movable element includes at least one protruding end, which is received in another of the main body and the movable part, the movable element cooperates with the elastic member to fix the movable part at least in the closed position, and the movable element acquires a moving space by squeezing the elastic member. During the opening and closing of the movable part, the wear-resistant movable element replaces the elastic element to cause friction with the movable part, which improves the wear resistance and service life of the appliance.

Abstract: A buccal tube includes a main body. The main body is provided with a traction hook which can move or rotate relative to the main body, and the main body is internally provided with an accommodation space. When the traction hook is not in use, the traction hook is disposed in the accommodation space. When the traction hook is in use, one end of the traction hook outwardly rotates or moves away from the accommodation space.