Growth and Aging (inc. Tooth Eruption)

Question 1

Closure of posterior fontanelle occurs ?

Answer 1

2 months.

Question 2

Tympanic ring lengthens to plate ?

Answer 2

3-9 months.

Question 3

1st central incisor (first tooth) erupts …

Answer 3

6 months.

Question 4

Mental symphysis occurs ?

Answer 4

7-8 months.

Question 5

Metopic suture fusion occurs ?

Answer 5

9 months.

Question 6

Closure of anterior fontanelle occurs ?

Answer 6

2 years old.

Question 7

Mastoid process becomes distinct at ?

Answer 7

2 years old.

Question 8

All deciduous teeth should be present by ?

Answer 8

2.5 to 3 years old.

Question 9

Occipital bone centres of ossification should fuse at ?

Answer 9

5 years old.

Question 10

Angle of the mandible lessens by ?

Answer 10

5 years old.

Question 11

Metopic suture disappears at ?

Answer 11

6 years old.

Question 12

Permanent 6s erupt at ?

Answer 12

6 years old.

Question 13

Spheno-occipital synchondrosis (union of the base of the skull) occurs ?

Answer 13

16-25 years old.

Question 14

Eruption pattern for deciduous dentition ?

Answer 14

A B D C E

Question 15

Eruption pattern for maxillary permanent dentition ?

Answer 15

6 1 2 4 5 3 7 8

Question 16

Eruption pattern for mandibular permanent dentition ?

Answer 16

6 1 2 3 4 5 7 8

Question 17

Mixed dentition phase is between ?

Answer 17

6 and 11 years old.

Question 18

General rule for eruption of deciduous dentition ?

Answer 18

Lowers before uppers except lateral incisors.

Question 19

General rule for eruption of permanent dentition ?

Answer 19

Lowers before uppers except 2nd premolars.

Question 20

For deciduous dentition, apexogenesis should be complete ?

Answer 20

1.5 years post-eruption.

Question 21

For permanent dentition, apexogenesis should be complete ?

Answer 21

3 years post-eruption.

Question 22

At age 6, you should expect to see ?

Answer 22

Permanent 6s (maxillary and mandibular) and mandibular central incisors.

Question 23

In deciduous and permanent dentition, you should expect to see contra-lateral teeth erupt with ?

Answer 23

3 months of the contra-lateral tooth.

Question 24

At age 7, you should expect eruption of ?

Answer 24

Maxillary central incisors, mandibular laterals.

Question 25

At age 8, you should expect to see eruption of ?

Answer 25

Maxillary lateral incisors.

Question 26

At age 9, you should expect to see eruption of ?

Answer 26

Mandibular canines.

Question 27

At age 10, you should expect to see eruption of ?

Answer 27

All premolars (1st and second).

Question 28

At age 11, you should expect to see eruption of ?

Answer 28

Maxillary canine.

Question 29

At age 12, you should expect to see eruption of ?

Answer 29

Maxillary and mandibular 2nd molars.

Question 30

At 18+, you can expect eruption of ?

Answer 30

3rd molars (large variation).