An alternative technique in the treatment of anterior cross bite in a case of Nickel allergy: a case report.

AIM The objective of this paper is to show an alternative use of an Essix based appliance in the treatment of anterior single-tooth crossbite malocclusion in a patient with Nickel allergy. MATERIALS AND METHODS Anterior crossbite malocclusion of one or more teeth, without posterior crossbite association, is a relatively frequent condition both in the mixed and the permanent dentition. This kind of malocclusion is usually treated with either fixed or removable appliances. The use of preformed Essix appliances could be an alternative to traditional removable and fixed orthodontic devices in patients with Nickel allergy as well as in every patient. RESULTS The treatment was successfully completed in 12 weeks, the anterior single tooth crossbite was corrected using three full arch Essix-based appliances planned on the set-up casting, providing a gradual vestibular movement. Patient compliance was requested in order to provide the planned dental movement. CONCLUSION The Essix appliance can be successfully used to correct a single-tooth crossbite even in allergic subjects in a short time with patient cooperation.