Roberts Retractor
Roberts retractors are a type of removable functional orthodontic appliance. The special part of this appliance is the labial arch which is a flexible bow in tubing to allow for the adjustment/ retraction of central and lateral incisors. The activation is enhanced by the transversal mesial tags of the labial arch through the placement of small tubes of corresponding size which are pulled over the wire. This way the thinner active part of the labial arch, with additional loops in the U-loops, can serve specifically as an active element