(E1) 7 - Eruptive Movements Part 2 - Tooth Exfoliation

Question 1

Local factors impacting eruption

Answer 1

Question 2

Systemic factors impacting eruption

Answer 2

Question 3

What are the two broad classifications of eruptive disturbances?

Answer 3

Question 4

Eruptive disturbances may be clinically classified based on:

Answer 4

1 - eruptive time
2 - eruptive position of tooth in arch

Question 5

Define infra-occluded

Answer 5

Question 6

Define submerged

Answer 6

Question 7

Define Impacted

Answer 7

Question 8

Define Embedded

Answer 8

Question 9

Define ectopic eruption

Answer 9

Question 10

Common Feature & Difference for mechanisms of eruption for deciduous and permanent teeth

Answer 10

Question 11

Steps involved in eruption of permanent tooth: Step 1?

Answer 11

Question 12

Steps involved in eruption of permanent tooth: Step 2?

Answer 12

Question 13

What teeth form a gubernacular canal?

Answer 13

Anterior only (eruption canal)

Question 14

Steps involved in eruption of permanent tooth: Step 3?

Answer 14

Question 15

Premolar resorption begins __________ – premolar gradually moves ________

Answer 15

• inter-radicular between roots primary molar
• occlusally

Question 16

Describe tooth resorption for permanent molar

Answer 16

Question 17

Image: Summary of Eruption and Exfoliation

Answer 17

Question 18

Exfoliation is controlled by_______ signals originating from the permanent tooth and ______ signals from the primary tooth. A primary tooth may exfoliate without successor but usually delayed. Several factors such as ______________ stimulate resorption

Answer 18

• extrinsic
• intrinsic
• apoptosis, and occlusal forces

Question 19

Source of Intrinsic signals : Primary tooth

Answer 19

• pulp
• cementum
• dentin and PDL

Question 20

Mechanism of action of intrinsic signals.

Answer 20

Question 21

Programmed Cell Death - Parts and Outcome

Answer 21

Question 22

Source of Extrinsic signaling : Originate from
Permanent tooth

Answer 22

• REE
• Dental follicle

Question 23

Types of Signals released for extrinsic signaling and Outcome

Answer 23

Question 24

Image Primary Dentition Chart

Answer 24

Question 25

Image Permanent Dentition Chart

Answer 25

Question 26

Exfoliation Features of Coronal Resportion of Alveolar Bone Crypt

Answer 26

Question 27

Exfoliation Features of External Root Surface

Answer 27

Question 28

Exfoliation Features of Internal Pulp Surface

Answer 28

Question 29

What does the reversal line show?

Answer 29

Signs of repair in secondary cementum and PDL re-anchorage

Question 30

What is Premature exfoliation?

Answer 30

A tooth may shed prematurely prior to normal age. Cause often due to external root resorption associated with trauma, infection, or impacted unerupted tooth.

Question 31

What is Primary tooth retention?

Answer 31

Each deciduous tooth passes through a normal exfoliation (physiological resorption) process, but occasionally the deciduous tooth may be retained in its place beyond the normal time of exfoliation. Persistence of deciduous tooth may occur due to a variety of reasons.