eruption

Question 1

what is active eruption?

Answer 1

movement of the tooth through the tissues in direction of the occlusal plane

Question 2

what is passive eruption?

Answer 2

on eruption only 2/3 crown visible

Question 3

4 theories of tooth eruption

Answer 3

Root growth
Pulpal proliferation
Bone growth
Blood pressure

Question 4

tooth

Answer 4

Fully formed crown is covered by reduced enamel epithelium
Root formation pushes the crown towards the oral cavity
Eventually the tooth erupts into the oral cavity resting in the correct occlusal plane
Following eruption of crown the Reduced Enamel Epithelium and Oral epithelium form a cuff around the cervical 1/3 tooth
Eventually the gingival margin recedes to CEJ (passive eruptions) definitive junctional epithelium is formed.

Question 5

how does shedding of primary teeth occur?

Answer 5

Primary teeth shed due to force of mastication

Question 6

what is a gubernacular canal

Answer 6

small canal located between the permanent tooth germ and the apex of the deciduous tooth

Question 7

how do permanent teeth erupt?

Answer 7

lingually and apically
Development and eruption of these teeth will resorb the primary roots