The effect of early interceptive treatment in children with posterior cross-bite

Abstract
To evaluate the results of interceptive treatment in the deciduous and early mixed dentition in children with posterior crossbite in contrast to nontreatment, 86 4-yr-old children with posterior crossbite were selected from a total of 1046 children (9.6%). Half of the children with posterior crossbite were treated early, starting at 5 yr of age with grinding, and, in the event of unsatisfactory results, expansion plates. The other half of the children were not treated until the age of 13. Another 25 children with excellent occlusion were included in the study as controls. All the children were followed to the age of 13 with 5 registrations at different ages. The registrations comprised clinical examination, impressions for dental casts, radiographic examination and photographs. Due to removal from the town or lack of interest some children were lost to follow-up. Thus, 61 children and 25 controls were included in the 8-yr longitudinal follow-up. Of the 33 children treated early, only 9 showed correction of the crossbite after grinding treatment. The subsequent interceptive treatment with expansion plates resulted in correction of the crossbite in a further 17 children. Of the 28 children where no corrective treatment had been performed during the observation period, 6 showed spontaneous correction of the crossbite. Four children in the control group developed crossbite. It is, therefore, recommended to start treatment of posterior crossbite by grinding in the deciduous dentition. If there is no effect, an orthodontic appliance, preferably fixed, should be applied in the early mixed dentition.

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