Eruption and Shedding

Question 1

preeruptive

Answer 1

positioning of tooth germs prior to eruption

Question 2

eruptive

Answer 2

the movement of the tooth into functional occlusion

Question 3

Posteruptive

Answer 3

movements in compensation for the growth of jaws/wear. meant to keep the tooth in occlusion

Question 4

shedding

Answer 4

the programmed loss of the primary teeth to make way for the permanent dentition

Question 5

avulsion

Answer 5

an extreme example of non physiologic tooth movement

Question 6

Bone remodeling theory

Answer 6

bone deposits under a erupting tooth propelling it outwards.

Question 7

problems of Bone remoldeling theory

Answer 7

1. removal of dental follicle=no bone remodeling-no eruption

2. replica teeth placed in an intact follicle still form an eruption

Question 8

tooth Growth theory

Answer 8

root formation pushes the tooth outwards

Question 9

problems with tooth growth theory

Answer 9

1. pushing against what?
2. not enough root to account for movement to occlusal plane
3. if you cutoff the roots, a tooth will still erupt

Question 10

Vascular pressure theory

Answer 10

blood vessels at the tooth apex push it outwards via hydrostatic pressure

Question 11

problem with Vascular pressure theory

Answer 11

1. no way is this pressure sufficient

2. when you remove the vascular supply, teeth still still erut