Posterior crossbite in Iraq

ABSTRACT

Six governorates [Baghdad the capital, Ninevah, Basrah, Diyala, Anbar and Najaf] were selected to cover Iraq geographically. More than seven thousand 13 year olds were selected and an intraoral clinical examination was used to assess the presence of posterior crossbite. Posterior crossbite affecting single teeth was found in 6.1% of the sample [4.9% unilateral and 1.2% bilateral], whereas scissors bite was found in 1.5% [1.4% unilateral and 0.1% bilateral], The most commonly involved teeth in both crossbite and scissors bite were the second premolars