A method to correct a single premolar tooth in crossbite.

: In Class I malocclusions, when the only complaint is the localized crossbite of a premolar, resulting from a mild shortage of space, correction can be simply undertaken. Adams clasps and an expansion screw are incorporated into a simple removable appliance designed to provide space to align the malpositioned tooth, which is then guided into the line of the arch by a piece of elastomeric thread stretched between the Adams clasps.