Abstract: An orthodontic system includes a dental appliance and an auxiliary arrangement unit. The dental appliance includes a main body defining a receiving space for receiving at least a portion of a dentition of a user therein. The main body is formed with a main projection projecting outwardly away from the receiving space. The auxiliary arrangement unit includes an attaching member to be bonded to a tooth of the dentition, and a restraining member interconnecting the main projection and the attaching member for moving the tooth toward the main projection.

Abstract: An intraoral retractor includes a main body plane with one curved end and is dented in the middle to avoid injure the frenum; and the other end is a handle bended 30 degree away from the plan of the body. The grasper is inserted within a patient's mouth to retract the lip and open the patient's mouth vertically, while the handle allows easy operation. With the retractor, the operator can pull the patient's upper or lower lip as desired and examine the upper or lower dentition, which is highly useful for intraoral photography, dental checkups and treatments.