Which term refers to the movement of a tooth toward the eruption direction?

• A. Extrusion
• B. Intrusion
• C. Open Bite
• D. Overbite

Answer: (A)

Extrusion is the movement of a tooth in a coronal direction, toward its eruption path as it erupts into the oral cavity. It causes the crown to move out of the socket and become more exposed above the occlusal plane. Intrusion is the opposite, driving the tooth apically into the socket. Open bite and overbite describe vertical bite relationships between the upper and lower incisors, not a movement toward eruption.