Anterior crossbites are commonly encountered in the mixed dentition and are an indication for early orthodontic intervention.
Although most general dental practitioners carry out only small amounts of orthodontic treatment, many will have received undergraduate training in the management of anterior crossbites and may be confident about tackling such malocclusions using removable appliances.
It is important for practitioners to understand the limitations of removable appliances and to be aware of alternative treatment options.
AETIOLOGY : Crossbite is a discrepancy in the buccolingual relationship of the upper and lower teeth. Anterior crossbite of all four incisors is rare in patients who do not have a skeletal Class III jaw relationship; however, crossbite of one or two maxillary incisor teeth in patients with normal facial proportions is commonly seen where there is lack of space for the permanent incisors.
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The permanent tooth buds develop lingually to the deciduous predecessors; a shortage of space may force these teeth to remain palatal to the line of the arch and to erupt into crossbite.
° Dental Update – July/August 2002
° R.M. SKEGGS AND P.J. SANDLER