Which of the following is true regarding crowding of the dentition?
High-Yield Explanation
According to data available, approximately 15% of adolescents have severe crowding that would require major amounts of expansion or extractions to resolve. The other statements are false: crowding in the primary dentition is very rare and would indicate crowding will occur in the permanent dentition; spacing in the primary dentition is normal; and African-Americans generally have less crowding than whites.