A reverse labial step is characteristic of which malocclusion?

A reverse labial step is characteristic of which malocclusion?

• A. crossbite in the frontal part
• B. open bite
• C. deep bite
• D. crossbite unilateral (lingual form)

Answer: (A)

A reverse labial step reflects the lower arch being ahead of the upper arch in the posterior region, which signals a frontal (anterior) crossbite. When the lower teeth sit more labially than the upper ones, the upper front teeth end up biting palatal to the lower front teeth, producing a negative overjet. This frontal crossbite pattern is the classic situation associated with a reverse labial step, rather than vertical discrepancies like open bite or deep bite, or a unilateral crossbite that occurs on one side without the same frontal anterior relationship.

A reverse labial step reflects the lower arch being ahead of the upper arch in the posterior region, which signals a frontal (anterior) crossbite. When the lower teeth sit more labially than the upper ones, the upper front teeth end up biting palatal to the lower front teeth, producing a negative overjet. This frontal crossbite pattern is the classic situation associated with a reverse labial step, rather than vertical discrepancies like open bite or deep bite, or a unilateral crossbite that occurs on one side without the same frontal anterior relationship.