Which term describes the movement of a tooth in the direction of eruption?

Which term describes the movement of a tooth in the direction of eruption?

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

Answer: (A)

Movement toward eruption is called extrusion. In dental terms, extrusion describes a tooth moving in a coronal direction—its crown rises toward the occlusal plane as it erupts into the mouth. This is different from intrusion, which is the opposite movement deeper into the bone (toward the root). Open bite and overbite refer to how the teeth vertically relate when the jaws are closed, not to a movement of eruption. So extrusion is the best term for movement in the direction of eruption.

Movement toward eruption is called extrusion. In dental terms, extrusion describes a tooth moving in a coronal direction—its crown rises toward the occlusal plane as it erupts into the mouth. This is different from intrusion, which is the opposite movement deeper into the bone (toward the root). Open bite and overbite refer to how the teeth vertically relate when the jaws are closed, not to a movement of eruption. So extrusion is the best term for movement in the direction of eruption.