A novel self-ligation bracket with changeable slot size

Abstract Background The self-ligation bracket is a major device used in orthodontic practice. The low friction between bracket and arch wire is an advantage of these brackets. Combination wires or reduction wires are often applied for sliding mechanics when using self-ligation brackets. However, the majority of commercially available self-ligation brackets are bulky, and the slot size cannot be changed during active treatment. To solve these problems, we developed a new round-shaped self-ligation bracket with changeable slot size. Methods and subjects The new bracket comprises two parts, the base with the wire slot and the removable slider, and the arch wire is ligated to the sliders. The bracket has an innovative feature; the slot size can be changed by adjusting the removable sliders. Appropriate sliders are selected based on the purpose of treatment. The prototype of the bracket was applied in a 12-year-old female patient with bimaxillary protrusion, and handling and efficiency of this bracket were examined. Results On clinical application, the round-shape design of the bracket did not cause any soft tissue injury, it was easy to change wires, and tooth control was appropriate. Conclusions The novel self-ligation bracket was effective clinically, and it shows potential for active orthodontic treatment.