How does the alveolar bone remodel in response to eruption?

• A. Alveolar bone remodeling removes bone to allow eruption and then re-establishes support around the erupting tooth.
• B. Alveolar bone thickens and does not change during eruption.
• C. No changes occur in alveolar bone during eruption.
• D. Eruption occurs without any bone remodeling.

Answer: (B)

During eruption, the alveolar bone undergoes active remodeling rather than simply thickening. Bone is resorbed along the eruption path so there’s a clear tunnel for the tooth to move coronally into its position. Once the tooth has erupted past the overlying bone, new bone is laid down around the root to reestablish the socket and the supporting crest (the lamina dura and surrounding bone adapt to the tooth’s new position). This process is coordinated by signals from the erupting tooth and the periodontal ligament, making eruption a dynamic sequence of bone resorption followed by bone deposition, not a static thickening or no change.