Tooth Eruption - 2.2 PDF

**[Tooth Eruption - 2.2]** Axial or occlusal movement of a tooth from its site of dev within alveolar process to functional position in oral cavity Teeth can more in 3 dimensions **Phases:** 1. 2. 3. 4. 5. **Active eruption** Movement from dev site in alveolar bone to functional position...

**[Tooth Eruption - 2.2]** Axial or occlusal movement of a tooth from its site of dev within alveolar process to functional position in oral cavity Teeth can more in 3 dimensions **Phases:** 1. 2. 3. 4. 5. **Active eruption** Movement from dev site in alveolar bone to functional position in oral cavity **Pre-eruptive movement** - - - Start of pre eruptive movement = initiation of tooth formation in early bell stage End of pre-eruptive movement = initiation of root formation **Eruptive movement** 1. 2. - - - - Start of eruptive movement = onset of root formation End of eruptive movement = tooth appearance in oral cavity (pre-functional phase) **Post eruptive tooth movement** - - Start of post-eruptive movement = when teeth attain occlusion **Passive eruption** - - **[Theories]** **Theories:** 1. 2. 3. 4. 5. 6. 7. **Pulp theory** - - Evidence against: - **Vascular pressure /BV thrust or hydrostatic pressure theory** - - - Vasodilators → eruption Vasoconstrictors → decrease rate of eruption Evidence against: - - - **Root formation/elongation theory** - - Evidence against: - - - - **Alveolar bone remodelling theory** - - Evidence for: - - - PFE = non-syndromic eruption disturbances not ass with defective OC - **PDL theory** - - Evidence for: - Evidence against: - - - - - **Dental follicle theory** - Dental follicle - - - - Evidence for: - - - **Neuromuscular theory (unification)** - - Factors affecting tooth eruption: - - - - - - - - - - Physiological tooth movement/post eruptive tooth movement - -