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135 Dental Radiography > Anatomical Landmarks > Flashcards

Anatomical Landmarks Flashcards

1
Q

Words that describe how dental images will appear

A

radiolucent and radiopaque

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2
Q

Radiolucent

A

black, dark gray

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3
Q

Radiopaque

A

white, light gray

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4
Q

Facial landmarks

A

Tragus of ear and ala of nose

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5
Q

How should the patient be sat for intra oral images?

A

Mid-sagittal plane perpendicular to the floor

Occlusal plane must be parallel to the floor

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6
Q

How must the patient be sat for extra oral mages?

A

ala-tragus line parallel to floor

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7
Q

Radiologic appearance of enamel

A

radiopaque

most dense structure in human body

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8
Q

Radiologic appearance of dentin

A

internal portion of tooth radiopaque- less dense than enamel

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9
Q

Radiologic appearance of cementum

A

Unable to see– because it is less dense than dentin

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10
Q

Radiologic appearance of pulp

A

radiolucent- composed of nerves and blood vessels –> soft tissue

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11
Q

Radiologic appearance of alveolar bone

A

radiopaque- composed or cortical and cancellous bone

Where teeth erupt from and how they are maintained in the jaw

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12
Q

Radiologic appearance of cortical bone

A

Radiopaque (dense)
compact or dense form of bone which lines the outside layers of the maxillary arch or mandible. Immediately surrounds and supports teeth

Also referred to as cribiform plate or lamina dura– continuous with alveolar crest– Borders the cancellous bone

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13
Q

Radiologic appearance of cancellous bone

A

Appears less radiopaque than the lamina dura– it is less dense

“Spongy”

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14
Q

Radiologic appearance of periodontal ligament

A

radiolucent line– between tooth and lamina dura

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15
Q

Radiologic appearance of nutrient canals

A

radiolucent lines in bone containing blood vessels and sometimes exhibit radiopaque borders

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16
Q

Landmarks of the maxillary arch around central/lateral incisors

A 
Incisive foramen/anterior palatine foramen
Median palatine suture
Nasal Fossae
Nasal septum
Inferior nasal conchae
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17
Q

Radiologic appearance of incisive foramen/anterior palatine foramen

A

Radiolucent, oval shape between the apices of the central incisors

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18
Q

Radiologic appearance of median palatine suture

A

Radiolucent, extends posteriorly through the midline of the palate

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19
Q

Radiologic appearance of nasal fossae

A

2 radiolucent areas upper portion of radiograph; air spaces

20
Q

Radiologic appearance of nasal septum

A

radiopaque between nasal fossae

21
Q

Radiologic appearance of inferior nasal conchae

A

wafer-like bone located in nasal fossa

22
Q

Landmarks of the maxillary arch near the cuspids

A

Nasal fossa
Maxillary sinus
Typical “Y” of maxillary sinus

23
Q

location of nasal fossa from cuspids

A

Upper left corner

24
Q

Radiologic appearance of maxillary sinus

A

Radiolucent- air space above bicuspids

25
Q

Radiologic appearance of typical “Y” of maxillary sinus

A

Radiopaque- where the upper front wall of maxillary sinus joins with the floor of the nasal fossa

26
Q

Maxillary Bicuspid landmarks

A

Maxillary sinus

Zygomatic or Malar bone

27
Q

Radiologic appearance of zygomatic or malar bone

A

Rdiopaque- U shaped

28
Q

Landmarks of the maxillary arch on molar radiographs

A 
Maxillary sinus
Zygomatic process
Zygoma
Maxillary tuberosity
Medial plate of the pterygoid process or Hamular process
Coronoid process
29
Q

Radiologic appearance of zygomatic process

A

U shaped radiopacy in the apical region of the 1st and 2nd molars superimposed over the molar root tips

30
Q

Radiologic appearance of the zygoma

A

Radiopaque- superimposed over maxillary molar sinus- extending posteriorly from the zygomatic bone

31
Q

Radiologic appearance of maxillary tuberosity

A

Radiopaque

32
Q

Radiologic appearance of Medial plate of pterygoid process or hamular process

A

Radiopaque- tendon attachment for muscle fibers

33
Q

Radiologic appearance of coronoid process

A

Radiopaque- serves as a point of muscle attachment

34
Q

Landmarks of the mandibular arch at central incisors

A 
Lingual foramen
Genial tubercles
mental ridge/process
Inferior border of the mandible
Mental fossa
35
Q

Radiologic appearance of Lingual foramen

A

radiolucent- between the apices of the central incisors

36
Q

Radiologic appearance of genial tubercles

A

radiopaque- surrounds the lingual foramen

37
Q

Radiologic appearance of mental ridge/process

A

Radiopaque, thickening of bone- located below the apices of the anterior teeth (labial)

38
Q

Landmarks of the mandibular arch at the cuspids

A

Mental foramen

Inferior border of the mandible

39
Q

Radiologic appearance of mental foramen

A

radiolucent- lies inferior to the apices of the bicuspids (labial)

40
Q

Landmarks of the mandibular arch at the bicuspids

A

Mental foramen
Mylohyoid ridge (internal oblique ridge)
Inferior border of mandible

41
Q

Radiologic appearance of mental foramen at the bicuspids

A

may be superimposed over the root apices of the bicuspids

Between them

42
Q

Radiologic appearance of mylohyoid ridge

A

Radiopaque- below the apices of the molars

43
Q

Landmarks of the mandibular arch at the molars

A 
Submandibular fossa
External oblique ridge
Internal oblique ridge
Mandibular canal
Inferior border of mandible
44
Q

Radiologic appearance of submandibular fossa

A

large, irregularly shaped area below roots of mandibular molar in which the bone thickening is reduced, often mistaken for a tissue

45
Q

Radiologic appearance of external oblique ridge

A

Radiopaque- terminates in the region of the 3rd molar/ outer surface of the mandible

46
Q

Radiologic appearance of internal oblique ridge

A

Radiopaque- inferior to the EOR also refered to as the mylohyoid ridge
Extends more anterior than the EOR- internal surface of mandible

47
Q

Radiologic appearance of mandibular canal

A

Radiolucent- carries nerves and blood vessels; travels to area of mental foramen

135 Dental Radiography (23 decks)

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