Cranium, Facial Bones, Zygomatic Arches And Orbits

Question 1

Smallest bones in the skull

Answer 1

Lacrimal bones

Question 2

What passes through the lacrimal foramen

Answer 2

Tear duct

Question 3

Nasal bones articulate with eachother in what plane

Answer 3

Mid sag

Question 4

Which facial bones have pairs

Answer 4

Nasal, lacrimal, maxillary, zygomatic, palatine, inferior nasal conchae

Question 5

Largest immovable bones of the face

Answer 5

Maxillary

Question 6

Where are lacrimal bones found

Answer 6

Anterior part of the medial wall of the orbits between the labyrinth of the ethmoid bone and the maxilla

Question 7

What X-rays show the lacrimal bones

Answer 7

Pa and lateral projections

Question 8

Where are lacrimal bones found

Answer 8

Anterior pard of the medial wall of the orbits between the labyrinth of the ethmoid bone and The maxilla

Question 9

The alveolar process

Answer 9

Thick spongy ridge on the inferior border of maxilla

Question 10

Each maxilla contains a large

Answer 10

Pyramidal cavity called maxillary sinus

Question 11

Maxillary bones form a pointed forward -projecting process called

Answer 11

Anterior nasal spine

Question 12

Zygomatic bones form the

Answer 12

Prominence of the cheeks and part of the side wall and floor of orbital cavities

Question 13

Nasal conchae are

Answer 13

Long, narrow, extremely thin, curl laterally

Question 14

Small u-shaped bone situated at the base of the tongue

Answer 14

Hyoid bone

Question 15

Sutures are classified by

Answer 15

Fibrous joints of the suture type

Question 16

The atlantooccipital joint is a

Answer 16

Synovial ellipsoidal joint

Question 17

Bones of the orbit

Answer 17

Frontal, sphenoid, ethmoid, maxilla, zygoma, lacrimal and palatine

Question 18

The long axis of the orbit is oblique and forms an angle of what with midsag

Answer 18

37 degrees

Question 19

The superior orbital fissure is the cleft between

Answer 19

The greater and lesser wing of the sphenoid bone

Question 20

Blowout fracture is best seen on what X-ray

Answer 20

Pacietoacanthial projection - waters method

Question 21

Fracture of orbital floor

Answer 21

Blowout fracture

Question 22

Fractures of zygomatic arch

Answer 22

Depressed fracture
Tripod fracture - all three sutures

Question 23

Maxilla fracture

Answer 23

Lefort fracture ( I, II, III)

Question 24

Facial bone fracture is a

Answer 24

Visceral cranial fracture

Question 25

Slowest healing bone in the body

Answer 25

Mandible

Question 26

What projection do you do for a blowout fracture

Answer 26

Modified waters

Question 27

Most frequently fractured facial bone

Answer 27

Nasal bone

Question 28

Lefort I

Answer 28

Palate

Question 29

Blowout fracture is a

Answer 29

Orbital floor fracture

Question 30

Lefort II

Answer 30

Nose and palate

Question 31

Lefort III

Answer 31

Entire face

Question 32

Lefort I : nasomaxillary signs

Answer 32

Malocclusion, buccal ecchymosis, epistaxis, maxillary creptius and maxilla mobile

Question 33

Lefort II: pyramidal - signs

Answer 33

Midface crepitus, facial lengthening, bilateral epistaxis,infra orbital parasthesia, ecchymosis

Question 34

Lefort III: craniofacial disjunction signs

Answer 34

Caved in or flattened, lengthened face, csf rhinoronea, bilateral epistaxis

Question 35

2 bones that form the bony nasal septum

Answer 35

Perpendicular plate of ethmoid bone and vomer

Question 36

Cones of the eyes form an angle of what with msp

Answer 36

37 degrees

Question 37

Cones of the eye form an angle of what with IOML

Answer 37

30 degrees

Question 38

When the orbits are of interest for a Pa Caldwell what is the angle

Answer 38

30 degree caudal angle

Question 39

How many facial bones are there

Answer 39

14

Question 40

the nasal bones form the

Answer 40

bony wall of the nose

Question 41

nasal bones articulate with

Answer 41

frontal, ethmoid, and maxillae

Question 42

how many pairs of nasal conchae

Answer 42

3

Question 43

which bones form the nasal conchae

Answer 43

ethmoid form superior and middle concha and facial bones form inferior concha

Question 44

where are the lacrimal bones located

Answer 44

medial wall of each orbit

Question 45

the maxilla bone articulates with all other facial bones except for the

Answer 45

mandible

Question 46

the maxilla bone forms part of the

Answer 46

lateral walls and most of the floor of the nasal cavity

Question 47

what is located under each orbit and serves as a passage through which the infraorbital nerve and artery reach the nose

Answer 47

infraorbital foramen

Question 48

inferior borders of spongy bone that support roots of teeth

Answer 48

alveolar process

Question 49

zygomatic bones form the

Answer 49

cheekbones, part of the side wall and floor or orbits

Question 50

what extends posteriorly to join the zygomatic process of the temporal bone

Answer 50

temporal process

Question 51

palatine bones are composed of

Answer 51

2 L shaped bones composed of vertical and horizontal plates

Question 52

which two bones form the hard palate

Answer 52

maxilla and palatine

Question 53

vomer is situated in

Answer 53

MST of the floor of the nasal cavity

Question 54

the vomer forms the

Answer 54

inferior nasal septum

Question 55

the hyoid bone is an

Answer 55

accessory bone

Question 56

where is the hyoid bone situated

Answer 56

the base of the tongue

Question 57

sutures are what type of joint

Answer 57

fibrous immovable

Question 58

how many bones if the orbit formed by

Answer 58

7

Question 59

function of orbits

Answer 59

protect eyes

Question 60

how are blowout fractures usually imaged

Answer 60

CT

Question 61

tripod fracture

Answer 61

fracture of the zygomatic arch

Question 62

slowest healing bone in the body

Answer 62

mandible

Question 63

lefort fracture

Answer 63

maxilla fracture

Question 64

lefort I fracture

Answer 64

horizontal fracture of the maxilla

Question 65

Lefort II fracture

Answer 65

a pyramid-shaped fracture involving inferior orbital rim

Question 66

lefort III fracture

Answer 66

involved seperation of all the facial bones from their cranial base

Question 67

most severe lefort fracture

Answer 67

Lefort III

Question 68

what plane is lined up for lateral facial bones

Answer 68

IOML parallel

Question 69

why would a 30 degree caudal angle be used for a PA axial caldwell method for facial bones and what is it called

Answer 69

to show orbital rims exaggerated caldwell

Question 70

patient head position for tangential zygomatic arches

Answer 70

top of head resting on the board, rotate MSP of head 15 degrees toward side being examined

Question 71

3 point landing for rhese method

Answer 71

nose, cheek and chin

Question 72

what angle does MSP form with the IR for these method

Answer 72

53 degree angle

Question 73

when the CR is perpendicular where are petrous ridges

Answer 73

fill the orbit

Question 74

when the CR has a 15 degree caudal angle where are petrous ridges

Answer 74

lower thirds of orbits

Question 75

when CR has 30 caudal angle where are the petrous ridges

Answer 75

below the orbits

Question 76

3 bones that form the orbital rim

Answer 76

frontal, maxilla and zygoma

Question 77

which bone forms three fourths of the roof of the mouth

Answer 77

maxillary bone

Question 78

typical skull

Answer 78

mesocephalic

Question 79

skull that is short front to back, broad side to side and shallow vertex to the base

Answer 79

brachycephalic

Question 80

Skull that is long front to back, narrow side to side, and deep vertex to base

Answer 80

dolichocephalic

Question 81

the petrous pyramids form an average angle of _____ degrees in dolichocephalic

Answer 81

40

Question 82

the petrous pyramids lie at an average angle of ___ degrees in the brachycephalic

Answer 82

54

Question 83

petrous pyramids project anteriorly and medially at an angle of ___ from the MSP in a mesocephalic skull

Answer 83

47

Question 84

cone-shaped, bony-walled cavities situated on each side of the MSP of the head

Answer 84

orbits

Question 85

each orbit has a

Answer 85

roof, medial wall, lateral wall, and a floor

Question 86

the apex of the orbit corresponds to the

Answer 86

optic foramen

Question 87

cleft between the greater and lesser wings of the sphenoid bones

Answer 87

superior orbital fissure

Question 88

narrow cleft extending from the lower anterolateral aspect of the sphenoid body anteriorly and laterally between the floor and lateral wall of orbit

Answer 88

inferior orbital fissure

Question 89

what parts of the orbits are very fragile

Answer 89

floor and walls

Question 90

Rods are used for

Answer 90

Night vision and fluoro viewing

Question 91

cones are used for

Answer 91

day light and to see color

Question 92

rods or cones cant see color

Answer 92

rods

Question 93

rods or cones have high spatial acuity

Answer 93

cones

Question 94

for high spatial resolution do you need large or small focal spot

Answer 94

small