Week 6 - Erupting sequence and timing

Question 1

What does emergence mean

Answer 1

tooth showing through the gingiva

Question 2

What does eruption mean

Answer 2

continuous movement from the position of the forming dental bud to occlusal contact

Question 3

When does the emergence of the fist primary teeth

Answer 3

6 months (+- 2 months)

Question 4

When is there a full primary dentition

Answer 4

3 years (+-6 months)

Question 5

When does the beginning of the mixed dentition start

Answer 5

6 years (+- 9 months)

Question 6

when does mixed dentition occur

Answer 6

from 6 until approximately 12 years of age

Question 7

When is there a full permanent dentition

Answer 7

11 (+- 9 months)

Question 8

Explain the process of pre emergent eruption

Answer 8

• begins soon after the root formation commences

2 processes involved
- resorption of bone ( and primary tooth) overlying the crown
- propulsive mechanism in the direction of the cleared path

Question 9

explain the process of post emergent eruption

Answer 9

a rapid process from the point of penetrating the gingiva until the occlusal level

Question 10

what occurs during dental age 6-7

Answer 10

• mandibular teeth most likely precede maxillary
• the first permanent teeth to erupt are most likely mandibular first molars

Question 11

What occurs during dental age of 8-9

Answer 11

• eruption of mandibular and maxillary lateral incisors
• continuation of root formation for the first molars and central incisors

Question 12

What occurs in the dental age 9-10

Answer 12

• mandibular canines close to eruption
• root formation completed for central incisors and first molars
• first signs of presence of third molars

Question 13

What occurs at dental age 10-12

Answer 13

• eruption of mandibular and maxillary first premolars
• continuation of root formation for second premolars and second permanent molars

Question 14

What occurs at dental age 12-13

Answer 14

• eruption of maxillary canines, maxillary and mandibular second premolars, mandibular and maxillary second permanent molars
• crown of third permanent molars close to completion

Question 15

What occurs dental age 15-16

Answer 15

• root formation of all permanent molars completed (except the third molars)
• crown completed for all third molars and continuation of their roots formation