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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
On a PA Mandible CR is?
Perpendicular; exit acanthion
25
On a PA Mandible what does this view demonstrate?
◾️mandibular rami and body | ◾️must see entire mandible
26
On PA axial mandible what touches the grid?
Forehead and nose
27
On PA axial mandible what type of fractures it demonstrates?
Medial or lateral displacement of fragments in fractures of rami
28
On PA axial mandible OML is?
Perpendicular
29
On PA axial mandible MSP is?
Perpendicular
30
On PA axial mandible CR is?
20-25 cephalic; exits acanthion
31
On PA axial mandible can you see the mandibular condyles?
Yes
32
On the axiolateral oblique mandible what anatomic piece is parallel to IR?
Desired portion of mandible
33
On the axiolateral oblique mandible CR is?
20-25 cephalic enter 2" distal gonion of upside. | Exits down mandibular body
34
* 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
On the axiolateral oblique mandible what is demonstrated?
35
On the axiolateral oblique mandible when doing the semi supine projection, what is your tube angle? What is the angle of the sponge used?
Tube 20-25 cephalic | Sponge 15-20
36
On the axiolateral oblique mandible done TT or Bucky when pt is semi supine?
TT
37
On the axiolateral oblique mandible you need to make sure what other body part does not superimpose the mandible
Cervical spine
38
In axiolateral oblique TMJS where to center IR?
1/2 inch anterior to EAM
39
In axiolateral oblique TMJS CR is?
25-30 caudal entering 1/2 anterior and 2 inch superior to upside EAM Exits through TMJ closer to IR
40
In axiolateral oblique TMJS which side is against the IR?
Cheek- affected Side
41
* 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
In axiolateral oblique TMJS what is demonstrated?
42
In axiolateral oblique TMJS MSP is
Parallel
43
In axiolateral oblique TMJS IPL is
Perpendicular
44
In AP axial TMJS what touches the IR?
Posterior skull
45
In AP axial TMJS demonstrates what?
Condyles if mandible and mandibular fossa of temporal bone
46
In AP axial TMJS OML is?
Perpendicular
47
In AP axial TMJS MSP is?
Perpendicular
48
In AP axial TMJS CR is?
35 caudal midway between TMJS 3 inches above nasion
49
In AP axial TMJS 2 exposures are made, what are they?
Open and closed mouth
50
In axiolateral oblique TMJS (law method) what are the differences from the other axiolateral oblique TMJ method?
On law you tilt MSP 15 degrees toward the IR and make AML parallel with the transverse axis of the IR
51
In axiolateral oblique TMJS (law method) the CR is
15 degree caudal exiting the TMJ closest to the IR. Enters 1/2 superior to the upside EAM
52
* 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.
In axiolateral oblique TMJS (law method) demonstrates what?
53
In lateral sinuses IPL is
Perpendicular
54
In lateral sinuses MSP is
Parallel
55
In lateral sinuses IOML is
Parallel to transverse plane of IR
56
In lateral sinuses CR is
Perpendicular; 1/2-1 inch posterior to outer canthus
57
In lateral sinuses which sinuses are demonstrated?
All 4
58
In lateral sinuses what sinus is most posterior on image?
Sphenoid
59
In lateral sinuses how do orbital roofs and mandibular rami appear?
superimposed
60
In PA axial (Caldwell) what parts are touching the IR
Nose and forehead
61
In PA axial (Caldwell) OML is
Perpendicular
62
In PA axial (Caldwell) CR is
15 caudal exits nasion
63
In PA axial (Caldwell) what sinus is best demonstrated
Frontal sinuses
64
In PA axial (Caldwell) what other sinus is demonstrated
Ethmoid sinus
65
In PA axial (Caldwell) where are the petrous ridges?
Lower third of orbits
66
In the pareitoacanthial waters sinuses what part is touching the IR
Chin
67
In the pareitoacanthial waters sinuses OML is
37 degree angle
68
In the pareitoacanthial waters sinuses MML is
Perpendicular
69
In the pareitoacanthial waters sinuses CR is
Exits acanthion
70
In the pareitoacanthial waters sinuses the petrous ridges are located where?
Below the floor of the maxillary sinus
71
In the pareitoacanthial waters sinuses what sinus is best demonstrated?
Maxillary sinus
72
Paretoorbital oblique Rhese Orbit which parts are touching the grid
Nose, cheek, chin
73
Paretoorbital oblique Rhese Orbit AML is
Perpendicular
74
Paretoorbital oblique Rhese Orbit rotate head so the MSP is
53 degrees to the plane of IR
75
Paretoorbital oblique Rhese Orbit the CR is
Perpendicular; and exits orbit closest to IR
76
Paretoorbital oblique Rhese Orbit demonstrates
⚫️Optic foramen in lower outer quadrant of the orbit | ⚫️demonstrates superior and lateral orbital margins

spring 2015 (43 decks)

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