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Anatomy of Dentistry Semester 2 > Oestology of the Skull > Flashcards

Oestology of the Skull Flashcards

1
Q

What is the Anterior Fontanelle and where is it found?

A

Intersection of the inter-frontal, coronal and sagittal sutures. It is diamond-shaped

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2
Q

When does the anterior fontanelle disappear?

A

At one and half years of age

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3
Q

What are sutures?

A

They are an unossified membranous intervals that separate the bones of the vault

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4
Q

What is the posterior fontanelle and where is it found?

A

Lies at the intersection of the sagittal and lambdoid sutures and is triangular.

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5
Q

When does the posterior fontanelle fuse?

A

First year of life

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6
Q

Where are many small fontanelles found on the skull?

A

The lateral aspect

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7
Q

What is the clinical importance of fontanelles and sutures?

A
  • Membranous Articulations/ molding during birth
  • Allows brain development/ enlargement
  • Access into cranium / Venus sinus/ ventricle
  • Bulging : increased intracranial pressure
  • Depression : dehydration
  • Monitor Pulse
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8
Q

What is meant by the ventricle?

A

The cavity inside the cranium

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9
Q

When is the one time overlap of sutures occurs?

A

At birth

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10
Q

What is the importance of molding of the neonatal skull at birth?

A

Allow diameter of the skull to become smaller, therefore easier for baby to come out during natural birth

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11
Q

What would happen if there was dehydration of the skull?

A

Need to be hospitalised fro intravenous fluid

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12
Q

If there was assumptions of meningitis what would be done?

A

Inject into the anterior fontanelle and extract cerebrospinal fluid very easily

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13
Q

Name one difference in the size of the cranium between a newborn skull and an adult skull

A

Newborn skull has a disproportionately large cranium (portion enclosing the brain) relative to the face

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14
Q

What cause increase in length of the face?

A

Growth of the mandible, maxillary sinuses, and the alveolar process of the maxilla

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15
Q

What is meant by the neurocranium?

A

Bones enclosing the brain

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16
Q

What is meant by the viscerocranium?

A

Facial bones

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17
Q

List all the facial bones (viscerocranium)

A 
Zygomatic bones
Maxillae
Nasal bones
Lacrimal bones
Vomer
Palatine bones
Inferior concha
Mandible
Sphenoid
Ethmoid
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18
Q

List there facial bones which are paired

A 
Zygomatic bones
Maxillae
Nasal bones
Lacrimal bones
Palatine bones
Inferior concha
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19
Q

List all the facial bones that are single

A

Vomer
Mandible
Sphenoid
Ethmoid

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20
Q

Are the Zygomatic bones

paired or single?

A

Paired

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21
Q

Are the Maxillae bones paired or single?

A

Paired

22
Q

Are the Nasal bones paired or single?

A

Paired

23
Q

Are the Lacrimal bones paired or single?

A

Paired

24
Q

Are the Vomer bones paired or single?

A

Single

25
Q

Are the Palatine bones paired or single?

A

Paired

26
Q

Are the Inferior concha bones paired or single?

A

Paired

27
Q

Are the Mandible bones paired or single?

A

Single

28
Q

Are the Sphenoid bone paired or single in the viscerocranium?

A

Single

29
Q

Are the Ethmoid bones paired or single in the viscerocranium?

A

Single

30
Q

What is the nasal bone paired?

A

It has a suture

31
Q

What is the vomer bone part of?

A

The nasal septum

32
Q

List the bones that form the neurocranium

A 
Single Frontal 
Paired parietal 
Paired temporal 
Single Occipital bone 
Single Sphenoid bone 
Single  Ethmoid bone
33
Q

How many cranial bones are there?

A

8

34
Q

List all the single bones that form the neurocranium

A

Single Frontal
Single Occipital bone
Single Sphenoid bone
Ethmoid bone

35
Q

List all the paired bones that form the neurocranium

A

Paired parietal

Paired temporal

36
Q

What are the features of the Norma Frontallis?

A

Nasion
Glabella
Supercilary Arches
Supraorbital margin

37
Q

What are the foramina in the norma frontalis?

A

Supraorbital

Infraorbital

38
Q

What is found within the frontal bone?

A

Superciliary arches
Supraorbital margin
Glabella

39
Q

What is found within the zygomatic bone?

A

Temporal process of zygomatic bone

40
Q

What is found in the temporal bone?

A 
Zygomatic process of temporal bone	
Superior and inferior temporal lines	
External acoustic meatus
Mastoid process		
Styloid process
41
Q

What is found in the maxilla?

A

Hard Palate

Infraorbital fporamen

42
Q

What is found in the occipital bone?

A

Occipital condyle (projection inside)
External occipital protuberance
Superior nuchal line

43
Q

What is the name for the large projection behind the ear?

A

Zygomatic process

44
Q

Where is the pterion found?

A

2.6cm behind and 1.3cm above the frontozygomatic suture

45
Q

What vessel runs along the pterion? Where is it found?

A

Anterior division of the middle meningeal artery
Runs underneath the pterion
Found outside the duramater

46
Q

State the consequence of a traumatic blow (perhaps car crash) to the pterion?

A

The middle meningeal artery could rupture as it passes very close to the pterion. This can cause internal bleeding and an extradural haematoma.

47
Q

List the 3 divisions of the interior base of the skull

A

Anterior cranial fossa
Middle cranial fossa
Posterior cranial fossa

48
Q

What separates the anterior cranial fossa from the middle cranial fossa?

A

The lesser wing of sphenoid

49
Q

What separates the middle cranial fossa from the posterior cranial fossa?

A

Petrous part of the temporal bone

50
Q

State differences between male and female skulls

A
  • Male skulls are heavier

- Forehead is beetle-browed

51
Q

What causes men to have more projected eyebrows (beetle-browed forehead)?

A

The frontal sinuses are larger and form more prominent superciliary arches externally

Anatomy of Dentistry Semester 2 (7 decks)

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