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RT 67 skull > Mandible , TMJ > Flashcards

Mandible , TMJ Flashcards

1
Q

_____ is the largest and denset bone of the face.

A

Mandible

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2
Q

What does the mandible consists of:

  1. ____
  2. ___
A
    1. curved horizontal portion= Body

2. 2 vertical portions = rami

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3
Q

At birth the mandible consists of bilateral piecies held together by ______, that ossifies during the _____ year of life.

A
  1. fibrous symphysis

2. 1st year of life

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4
Q

_____ is located at the site of ossification and is a triangular prominence

A

mental protuberance

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5
Q

____ is the most anterior and central part of the mandible

A

symphysis

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6
Q

____ is where the left and right halves of mandible are fused

A

symphysis

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7
Q

The superior boarder of the body of the mandible consist of spongy bone called the ______.

A

Alveolar process

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8
Q

Each ramus presents 2 process at its upper extremity

  1. ____
  2. ___
A
  1. Coronoid process ( anterior)

2. Condylar process ( posterior)

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9
Q

The 2 process of the rami are separated by a concave area called _____.

A

mandibular notch

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10
Q

______ articulates with mandibular fossa of the temporal bone

A

condylar process

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11
Q

The TMJ is situated immediately in front of the _____.

A

EAM

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12
Q

_____ is a small U-shaped structure. It is situated at the base of ____. It is an ______ bone of the axial skeleton

A

1.Hyoid bone
2. Base of tongue
3 Accessory

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13
Q

The ______ is the only bone of the body that does not articulate with any other bone

A

hypoid bone

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14
Q

What does the hyoid bone consists of:

A
  1. body
  2. 2 greater cornua
  3. 2 Lesser cornua
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15
Q

Why is there not a lateral projection of the mandible

A

because both halves of the mandible would superimpose each other obscuring information from both sides.

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16
Q

What makes up the condylar process

A

condyle
&
neck

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17
Q

For an axiolateral projection of the mandible , the head in true lateral position best demonstrates the ______

A

ramus

18
Q

for an axiolateral oblique projection of the mandible , the head in 30degree rotation toward IR best demonstrates the _____

A

body

19
Q

for an axiolateral oblique projection of the mandible , the head in 45degree rotation best demonstrates the _____

A

mentum / symphysis

20
Q

For an axiolateral oblique projection ____ degree to ____degree rotation best provides a general survey of mandible.

A

10 to 15 degree rotation

21
Q

Position for a PA Mandible

Rami

A

check series notes

*exits acanthion

22
Q

Position for a PA Axial Mandible ( Rami)

A
  • 20-25 degree cephalad

* Exits acanthion

23
Q

Position for an Axiolateral Mandibe

A

*Ramus: True lateral position

  • 25 degree cephalad
  • CR exits mandibular region of interest
24
Q

Position for an Axiolateral Oblique: Body of mandible

A
  • 25 degree cephalad

* MSP is 30 degrees towards IR

25
Q

Position for an Axiolateral Oblique :

Sympysis /mentum

A
  • 25 degree cephalad

* MSP= 45 degree towards IR

26
Q

In the ____ projection of the mandible , the C-spine will over lap the body

A

Axiolateral oblique projection of the sympysis / mentum

  • should not overlap in the axioloateral ramus or axiolateral oblique of the body
27
Q

_____ is a A semi-circular tomographic image of the mandible

A

panorex

28
Q

Position for a AP Axial TMJ

A

Town’s method
* CR= 35 degree caudad OML or 42 degree IOML

*CR enters the Glabella & MSP or 3” above nasion
( CR needs to skim TMJ)

29
Q

What is the difference between the open mouth and closed mouth AP Axial TMJ

A

Open mouth: Condyle and TMJ are Below pars petrosa

30
Q

As you open your mouth the condyles are _____ from mandibular fossa

A

pulled out

= Inferior to the articular tubercle

31
Q

Where are the condyles during a closed mouth examination

A

In the mandibular fossa

32
Q

Shuller method is the method name for which projection

A

Axiolateral TMJ

33
Q

Position for an Axiolateral TMJ

Name the method

A 
AKA Schuller method
10 x 12" CW IR 
*25-30 degree caudad 
*CR enters 2" superior and 1/2" anterior to EAM 
*CR exits TMJ of interest 
*Head in true lateral position
IPL = perpendicular
MSP=//
34
Q

_____ is the method name for Axiolateral Oblique of TMJ

A

Modified Law method

35
Q

Position for Modified Law method

  • What lines are of interest ?
A

*Axiolateral Oblique TMJ

  • Double 15’s ( MSP and Tube angle)
  • MSP 15 degrees towards IR
  • CR =15 degree caudad
  • CR enters: 1 1/2” above EAM
  • CR Exits TMJ of profile
  • AML = // with transverse axis of IR
36
Q

______ extends posteriorly to join _____ of temporal bone

A
  1. Temporal process

2. zygomatic process

37
Q

What forms the zygomatic arch

A

union of the temporal process of zygoma

and

zygomatic process of temporal bone

38
Q

SMV stands for

A

Submentovertical

39
Q

Position for a SMV of Zygomatic arches

A
  • CR enters Perpendicular to IOML

* Enters MSP of throat @ level 1 “ posterior to outer canthus

40
Q

Position for Tangential Zygomatic Arch

A
  • Rotate MSP of head 15 degree toward side being examined
  • tilt top of head 15 degree from side being examined
  • CR centered to z-arch at a point 1” posterior to outer canthus
41
Q

What is the method name for an AP axial Zygomatic arches

A

Modified Towne’s method

42
Q

Position for a modified Towne’s method

A
  • AP Axial Zygotmatic arches
  • CR enters glabella & MSP or 1” above nasion

CR = 30 degrees caudad
OML is perpendicular

RT 67 skull (6 decks)

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