According to a national survey __% of persons age 8 to 5 years had severe crowding of the anterior incisors.

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It was found that 9% of persons 8 to 50 years of age had severe crowding of the anterior incisors and 25% had no crowding in a national survey of the latest published findings.Approximately 9% of persons had a posterior crossbite;this condition was most common in whites.Severe overbite was found in 8%,and a similar percentage had a severe overjet.Fewer than 5% of whites had an open bite.

According to a National Survey __% of Persons Age 8