Skull and Teeth

Question 1

When does the anterior fontanelle close?

Answer 1

18 months to 2 years

Question 2

When does the posterior fontanelle close?

Answer 2

2-3 months

Question 3

When does the sphenoidal fontanelle close?

Answer 3

6 months

Question 4

When does the mastoid fontanelle close?

Answer 4

6 to 18 months

Question 5

What are the two additional fontanelles which may be wrongly present at birth?

Answer 5

Metopic and sagittal fontanelle

Question 6

What condition is the sagittal fontanelle associated with?

Answer 6

Down’s syndrome

Question 7

What structures run through the cribiform plate?

Answer 7

Olfactory nerve, anterior ethmoidal nerves

Question 8

What structures run through the optic canal?

Answer 8

Optic nerve, opthalmic artery

Question 9

What structures run through the superior orbital fissure?

Answer 9

Lacrimal nerve
Opthalmic division of the trigeminal nerve 
Superior opthalmic vein 
Trochlear nerve 
Oculomotor nerve 
Abducens

Question 10

What structures run through the foramen rotundum?

Answer 10

Maxillary branch of the trigeminal nerve

Question 11

What structures run through the foramen ovale?

Answer 11

Mandibular branch of the trigeminal nerve

Question 12

What structures go through the foramen spinosum?

Answer 12

Middle meningeal artery

Middle meningeal vein

Question 13

What structures go through the internal acoustic meatus

Answer 13

Facial nerve

Vestibulocochlear nerve

Question 14

What structures go through the jugular foramen?

Answer 14

Glossopharngeal nerve
Vagus nerve
Accessory nerve

Question 15

What goes through the hypoglossal canal?

Answer 15

Hypoglossal nerve

Question 16

What are the 4 paranasal sinuses?

Answer 16

Frontal, sphenoid, ethmoid, maxillary

Question 17

Which are the largest of the paranasal sinuses?

Answer 17

Maxillary

Question 18

Where is the glabella?

Answer 18

Small depression medial to supraorbital ridges and superior to nasal bones

Question 19

Where is the gnathion?

Answer 19

The most anterior-inferior, mid-sagittal point on the border of the mandible

Question 20

Where is the gonion?

Answer 20

The most inferior, posterior and lateral point of the angle of the mandible

Question 21

Where is the labrale inferiorus?

Answer 21

The point where the superior vermillion border meets the midsagittal plane

Question 22

Where is the mentolabial sulcus?

Answer 22

Between the lower lip and the chin

Question 23

Where is the menton?

Answer 23

Most posterior-inferior, mid-sagittal point on the border of the mandible

Question 24

Where is the mid-nasal?

Answer 24

Mid point between superior and inferior border of nasal bone in midsagittal plane

Question 25

Where is the mid-philthrum?

Answer 25

Mid-point between two vertical grooves under the nose

Question 26

Where is the mid-ramus?

Answer 26

Mid-point between the condyle and the angle of the mandible

Question 27

Where is the nasion?

Answer 27

Intersection between the frontonasal suture and midsagittal plane

Question 28

Where is the pogonion?

Answer 28

The most projecting point in the mid-sagittal plane of the chin

Question 29

Where is the prosthion?

Answer 29

The most anterior point on the maxillary alveolar process

Question 30

Where is the rhinion?

Answer 30

Border of the nasal bone

Question 31

Where is the subnasale

Answer 31

Where the nasal septum and upper lip merge in the mid-sagittal plane

Question 32

Where is the vertex?

Answer 32

Where the 4 cranial bones meet

Question 33

Where is the zygion?

Answer 33

Most lateral point of the zygomatic arch

Question 34

When does the primary central incisor erupt?

Answer 34

8-12 months

Question 35

When does the primary lateral incisor erupt?

Answer 35

12-24 months

Question 36

When does the primary canine erupt?

Answer 36

16-24 months

Question 37

When does the primary first molar erupt?

Answer 37

12-16 months

Question 38

When does the primary second molar erupt?

Answer 38

24-32 months

Question 39

When do the top and bottom permanent central incisiors erupt?

Answer 39

7-8 years

Question 40

When do the top and bottom permanent lateral incisiors erupt?

Answer 40

bottom - 7-8 years | top - 8-9 years

Question 41

When do the top and bottom permanent canines erupt?

Answer 41

bottom - 9-10 years | top - 11-12 years

Question 42

When do the top and bottom permanent first premolars erupt?

Answer 42

9-10 years

Question 43

When do the top and bottom permanent second premolars erupt?

Answer 43

bottom - 11-12 | top - 10-12

Question 44

When do the top and bottom permanent M1s erupt?

Answer 44

6-7 years

Question 45

When do the top and bottom permanent M2s erupt?

Answer 45

bottom - 11-13 | top - 12-13

Question 46

When do the top and bottom permanent M3s erupt?

Answer 46

Between 17 and 25