Dental

Which of the following is true regarding crowding of the dentition?

Crowding of the primary dentition usually resolves as the permanent teeth erupt.

Spacing in the primary dentition usually indicates spacing will be present in the permanent dentition.

Approximately 15% of adolescents have crowding severe enough to consider extraction of permanent teeth as part of treatment.

Lower incisor crowding is more common in African-American than white populations.