malocclusion

/ˌmæləˈkluʒən/
noun
  1. A condition where the upper and lower teeth do not fit together properly when the mouth is closed, often requiring orthodontic treatment.
    • The dentist said her malocclusion was causing jaw pain and recommended braces.
    • Malocclusion can make it difficult to chew food properly.
    • Many people with malocclusion don't realize it until a dentist points out the misalignment.