Development and Eruption

Question 1

What are the 6 stages of Odontogenesis (Tooth Development)?

Answer 1

1. Initiation Stage
2. Bud Stage
3. Cap Stage
4. Bell Stage
5. Apposition
6. Maturation

Question 2

Initiation Stage

Answer 2

Induction

Ectoderm lining gives rise to oral epithelium and then to dental lamina adjacent to ectomesenchyme

6-7 weeks utero

Question 3

Bud Stage

Answer 3

Proliferation

Dental lamina grows into bud shape, penetrates ecotmesenchyme

8 weeks utero

Question 4

Cap Stage

Answer 4

Proliferation, differentiation, morphogenesis

Enamel organ surrounds ectomesenchyme
Dental Papilla and dental sac

9-10 weeks utero

Question 5

Bell stage

Answer 5

Proliferation, differentiation, morphogenesis

Differentiation of enamel organ into bell shape with 4 cells types and dental papilla into 2 cell types

11-12 weeks utero

Question 6

Apposition stage

Answer 6

Induction, Proliferation

dental tissue types secreted in successive layers as matrix

Various times

Question 7

Maturation Stage

Answer 7

Maturation

Dental tissue types fully mineralize to mature form

Various times

Question 8

How many lobes to anterior teeth have?

Answer 8

3 facial

1 lingual

Question 9

How many lobes do premolars have?

Answer 9

3 facial
1 lingual

Exept! mandibular 2nd usually has 5 lobes

Question 10

What is the 5th lobe called on Maxillary 1st molar?

Answer 10

Cusp of carabelli

Question 11

What is the 5th lobe on the Mandibular 1st molar?

Answer 11

Distal cusp

Question 12

Eruption of 1st molars

Answer 12

6

Question 13

Eruption of central incisors max

Answer 13

7-8

Question 14

Eruption of central incisors mand

Answer 14

6-7

Question 15

Eruption of lateral incisors max

Answer 15

8-9

Question 16

Eruption of lateral incisors mand

Answer 16

7-8

Question 17

Eruption of Mandibular canines

Answer 17

9-10

Question 18

Eruption of 1st premolar mand and max

Answer 18

10-11 mandible the max

Question 19

Eruption of 2nd premolar mand and max

Answer 19

10-12 Max then mand

Question 20

Eruption of Maxillary canines

Answer 20

11-12

Question 21

Eruption of 2nd molars mand and max

Answer 21

11-13 mand then max

Question 22

Eruption of 3rd molars mand and max

Answer 22

> 17 much variation

Question 23

Primary central incisors

Answer 23

6-12 months

Question 24

Primary lateral incisors

Answer 24

9-16 months

Question 25

Primary First Molars

Answer 25

13-19 months

Question 26

Primary canines

Answer 26

16-23 months

Question 27

Primary 2nd molars

Answer 27

23-33 months

Question 28

Do teeth erupt earlier in girls than boys?

Answer 28

yes