Correction of unilateral posterior cross bite in primary dentition by slow dentoalveolar expansion . - A case report

The incidence of posterior crossbite in the primary dentition has been reported as 8-22%. The crossbite usually results from bilateral maxillary constriction and is commonly associated with an occlusion guided lateral deviation of the mandible upon closing. Correction of the posteriorcross bite in the primary dentition is indicated to establish a stable occlusion and avoid possible deleterious effects on the developing temporomandibular joint and Treatment in the primary dentition results in the eruption of the first permanent molars in normal transverse relationship in 84% of the cases. The aim of the present case report shows the management of unilateral posteriorcross bite by slow dentoalveolar expansion as the duration of the treatment was shorter than those in cases with mixed dentition and permanent dentition and also, methods of treatment were simpler, and the patients developed favourably.