Premature eruption of the inferior anterior teeth can be caused by which condition?

• A. Formation of open bite malocclusion
• B. Formation of anterior crossbite
• C. Formation of posterior crossbite
• D. Formation of diastema between lower incisors

Answer: (B)

Premature eruption timing of teeth is influenced by how the teeth contact and guide each other in the bite. When there is an anterior crossbite, the lower incisors sit ahead of the upper incisors, creating an abnormal incisal relationship. This altered contact pattern gives the mandibular incisors a functional stimulus to erupt earlier in order to establish incisal contact, leading to premature eruption of the lower anterior teeth.

Open bite is a vertical discrepancy that doesn’t specifically drive earlier eruption of the lower front teeth. A posterior crossbite involves the back teeth and affects arch width rather than the eruption timing of the lower front teeth. A diastema between the lower incisors is a spacing issue that reflects space distribution rather than an eruption trigger.