1. Eruption Theories

3. ROOT ELONGATION THEORY

5. Crown completion Root growth starts Tooth erupt in oral cavity Root growth ends

6. Accommodation of new root tissue Movement of the crown of tooth Resorption of bone at the base of root

8. But this ligament has no bony insertion so, it cannot act as a fixed base

9. This theory was then rejected

11. Third molar have grown roots to full length but the teeth have not erupted.

12. However, Once the eruption pathway has been formed,the resistance to movement is presumably reduced and root growth may play a role.

13. Thank you