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spring 2015 > Mandible, Orbits, and Sinuses > Flashcards

Mandible, Orbits, and Sinuses Flashcards

0
Q

The curved horizontal portion of the mandible is the

A

Body

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1
Q

What is the largest moveable bone of the face

A

Mandible

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2
Q

The vertical portion of the mandible is the

A

Rami

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3
Q

The junction of the body and the ramus is the

A

Angle of mandible/gonion

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4
Q

The bump on the tip of the chin is termed the

A

Mental protuberance

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5
Q

The junction of the right and left halves of the mandible is the

A

Symphysis

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6
Q

The roots of the teeth are supports by this

A

Alveolar process

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7
Q

Nerves and blood vessels travel through this hole located on each side of the body of the mandible

A

Mental foramina

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8
Q

The anterior portion of the ramus is the

A

Coronoid process

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9
Q

The posterior portion of the ramus that articulates with the mandibular fossa is called the

A

Condylar process

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10
Q

Where is the mandibular notch located

A

Top of ramus between coronoid and condylar process

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11
Q

How many sinuses are there

A

4

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12
Q

What is within the normal sinus

A

Air

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13
Q

What are the 3 functions of the sinuses

A

⚫️warm and moisten inhaled air
◾️decrease weight of skull
⚫️provide resonating chamber for voice

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14
Q

These sinuses are cloud shaped and located over the midline

A

Frontal sinuses

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15
Q

The largest sinuses are the

A

Maxillary

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16
Q

The 2nd largest sinuses are the

A

Frontal

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17
Q

Which sinuses are located between the orbits

A

Ethmoid

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18
Q

These sinuses are triangular shaped

A

Maxillary

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19
Q

The maxillary sinuses are located on either side of the

A

Nose

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20
Q

The sphenoid sinuses are directly under the

A

Sella turcia

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21
Q

On a PA Mandible what touches the grid

A

Forehead and nose

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22
Q

On a PA Mandible OML is?

A

Perpendicular

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23
Q

On a PA Mandible MSP is?

A

Perpendicular

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24
Q

On a PA Mandible CR is?

A

Perpendicular; exit acanthion

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25
Q

On a PA Mandible what does this view demonstrate?

A

◾️mandibular rami and body

◾️must see entire mandible

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26
Q

On PA axial mandible what touches the grid?

A

Forehead and nose

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27
Q

On PA axial mandible what type of fractures it demonstrates?

A

Medial or lateral displacement of fragments in fractures of rami

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28
Q

On PA axial mandible OML is?

A

Perpendicular

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29
Q

On PA axial mandible MSP is?

A

Perpendicular

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30
Q

On PA axial mandible CR is?

A

20-25 cephalic; exits acanthion

31
Q

On PA axial mandible can you see the mandibular condyles?

A

Yes

32
Q

On the axiolateral oblique mandible what anatomic piece is parallel to IR?

A

Desired portion of mandible

33
Q

On the axiolateral oblique mandible CR is?

A

20-25 cephalic enter 2” distal gonion of upside.

Exits down mandibular body

34
Q
  • Ramus and body
    • No overlap of ramus by opposite side of mandible
    • No elongation or foreshortening of ramus or body
    • No superimposition of ramus by C-spine
  • Symphysis
    • No overlap of mentum region by opposite side of mandible
    • No foreshortening of mentum region
A

On the axiolateral oblique mandible what is demonstrated?

35
Q

On the axiolateral oblique mandible when doing the semi supine projection, what is your tube angle? What is the angle of the sponge used?

A

Tube 20-25 cephalic

Sponge 15-20

36
Q

On the axiolateral oblique mandible done TT or Bucky when pt is semi supine?

A

TT

37
Q

On the axiolateral oblique mandible you need to make sure what other body part does not superimpose the mandible

A

Cervical spine

38
Q

In axiolateral oblique TMJS where to center IR?

A

1/2 inch anterior to EAM

39
Q

In axiolateral oblique TMJS CR is?

A

25-30 caudal entering 1/2 anterior and 2 inch superior to upside EAM
Exits through TMJ closer to IR

40
Q

In axiolateral oblique TMJS which side is against the IR?

A

Cheek- affected Side

41
Q
  • Demonstrates condyles and neck of mandible
  • Both sides done for comparison
  • Must see TMJ’s
  • Condyle lying in mandibular fossa in closed-mouth position
  • Condyle lying inferior to articular tubercle in open-mouth position, if normal
A

In axiolateral oblique TMJS what is demonstrated?

42
Q

In axiolateral oblique TMJS MSP is

A

Parallel

43
Q

In axiolateral oblique TMJS IPL is

A

Perpendicular

44
Q

In AP axial TMJS what touches the IR?

A

Posterior skull

45
Q

In AP axial TMJS demonstrates what?

A

Condyles if mandible and mandibular fossa of temporal bone

46
Q

In AP axial TMJS OML is?

A

Perpendicular

47
Q

In AP axial TMJS MSP is?

A

Perpendicular

48
Q

In AP axial TMJS CR is?

A

35 caudal midway between TMJS 3 inches above nasion

49
Q

In AP axial TMJS 2 exposures are made, what are they?

A

Open and closed mouth

50
Q

In axiolateral oblique TMJS (law method) what are the differences from the other axiolateral oblique TMJ method?

A

On law you tilt MSP 15 degrees toward the IR and make AML parallel with the transverse axis of the IR

51
Q

In axiolateral oblique TMJS (law method) the CR is

A

15 degree caudal exiting the TMJ closest to the IR. Enters 1/2 superior to the upside EAM

52
Q
  • The images in the open-mouth and closed-mouth positions show the condyles and necks of the mandible.
  • The images show the relationship between the mandibular fossa and the condyle.
  • The open-mouth position shows the mandibular fossa and the condyle.
  • Both sides are examined for comparison.
  • The closed-mouth position shows fractures of the neck and condyle of the ramus.
A

In axiolateral oblique TMJS (law method) demonstrates what?

53
Q

In lateral sinuses IPL is

A

Perpendicular

54
Q

In lateral sinuses MSP is

A

Parallel

55
Q

In lateral sinuses IOML is

A

Parallel to transverse plane of IR

56
Q

In lateral sinuses CR is

A

Perpendicular; 1/2-1 inch posterior to outer canthus

57
Q

In lateral sinuses which sinuses are demonstrated?

A

All 4

58
Q

In lateral sinuses what sinus is most posterior on image?

A

Sphenoid

59
Q

In lateral sinuses how do orbital roofs and mandibular rami appear?

A

superimposed

60
Q

In PA axial (Caldwell) what parts are touching the IR

A

Nose and forehead

61
Q

In PA axial (Caldwell) OML is

A

Perpendicular

62
Q

In PA axial (Caldwell) CR is

A

15 caudal exits nasion

63
Q

In PA axial (Caldwell) what sinus is best demonstrated

A

Frontal sinuses

64
Q

In PA axial (Caldwell) what other sinus is demonstrated

A

Ethmoid sinus

65
Q

In PA axial (Caldwell) where are the petrous ridges?

A

Lower third of orbits

66
Q

In the pareitoacanthial waters sinuses what part is touching the IR

A

Chin

67
Q

In the pareitoacanthial waters sinuses OML is

A

37 degree angle

68
Q

In the pareitoacanthial waters sinuses MML is

A

Perpendicular

69
Q

In the pareitoacanthial waters sinuses CR is

A

Exits acanthion

70
Q

In the pareitoacanthial waters sinuses the petrous ridges are located where?

A

Below the floor of the maxillary sinus

71
Q

In the pareitoacanthial waters sinuses what sinus is best demonstrated?

A

Maxillary sinus

72
Q

Paretoorbital oblique Rhese Orbit which parts are touching the grid

A

Nose, cheek, chin

73
Q

Paretoorbital oblique Rhese Orbit AML is

A

Perpendicular

74
Q

Paretoorbital oblique Rhese Orbit rotate head so the MSP is

A

53 degrees to the plane of IR

75
Q

Paretoorbital oblique Rhese Orbit the CR is

A

Perpendicular; and exits orbit closest to IR

76
Q

Paretoorbital oblique Rhese Orbit demonstrates

A

⚫️Optic foramen in lower outer quadrant of the orbit

⚫️demonstrates superior and lateral orbital margins

spring 2015 (43 decks)

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