Abstract: Molar distalization is frequently used to increase arch length in orthodontic treatment. This article aims to introduce a simple device that uses digitally designed superelastic nickel-titanium (Ni-Ti) wire to achieve maxillary molar distalization. When the NiTi wire is bonded to the tooth surface, its deformation will produce orthodontic force, which makes the molar move. The device is easy to operate and clean. Besides, it requires low patient compliance and it can produce marked effects.

Key words: increase arch length, molar distalization, nickel-titanium wire