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(Dent421_mid_200620071_fig01) In the above radiograph, choose which of the

following statements are true regarding caries: (U=upper, L=Lower, D=distal, M=mesial)

Caries is present in U5D, L7M, L6D, L4D

Caries is present in U5D, U6M, L4D Caries is present in U4M, U5D, L7M, L6D, L4D

Caries is present in U4M, U5D, U6M, L6D, L4D

(Dent421_mid_200620071_fig02)In the above radiograph, teeth present are as

follows (according to the FDI nomenclature):

15, 14, 13, 43, 44, 4825, 24, 23, 33, 34, 38

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15, 14, 12, 43, 44, 47

25, 24, 22, 33, 34, 37

None of the above

(Dent421_mid_200620071_fig02) In the radiograph above:

There is evidence of root caries in the upper premolars and advance periodontaldisease

There is evidence of root caries but with normal periodontal condition

There is evidence of periodontal disease and no root caries just cervical burn outThere is mild periodontal disease and occlusal caries in the upper first premolar

No evidence of caries or periodontal disease on this radiograph

(Dent421_mid_200620071_fig03)The radiograph above shows:R

oot

caries

mesialto first

premolar, and proximal caries mesial to first molar, no periodontal disease

Mesial and distal caries at first molar and no sign of periodontal disease

Root caries mesial to first premolar, and proximal caries mesial to first molar, earlyperiodontal disease between first and second molars

Mesial caries at first molar and early signs of periodontal disease between first and

second molarsRoot caries mesial to first premolar, and proximal caries mesial to first molar,

generalized horizontal bone loss

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(Dent421_mid_200620071_fig04) The arrow in the above radiograph is pointing at:

Recurrent caries

Deficient restoration

Overhanging restorationMach band

Occlusal caries

(Dent421_mid_200620071_fig05) In the two radiographs above, the carious lesion

indicated by the arrow is located on the: lingual surface of lower first molar

buccal surface of lower first molar

occlusal surface of lower first molar

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(Dent421_mid_200620071_fig06) The radiopaque structure identified by the

arrow (# 6) is the:

inferior border of the orbitincisive foramenmiddle concha

floor of the nasal cavity

anterior nasal spine

(Dent421_mid_200620071_fig07) The radiopaque area outlined by the dotted line is:

Ghost image of the contralateral mandible

Ghost image of the C-spine The tongue shadow

The cheek shadow

None of the above

(Dent421_mid_200620071_fig06) The round radiolucency identified by the arrows (#

7) is the:posterior cranial fossa

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pterygomaxillary fissure

sinus recess

external auditory meatusintervertebral foramen

(Dent421_mid_200620071_fig06) The radiopaque structures identified by the arrows(# 8) is the:

ear lobe

cervical vertebraeclavicle

coronoid process

hyoid bone

If you see a small, round, cystlike radiolucency in the mandibular anterior midline

region of a panoramic film, what should you do?

Repeat the panoramic radiograph to see if the area can be duplicated

Aspirate the area to check for cystic or vascular lesionsCheck all teeth in the area for vitality

Take a standard periapical view to see if the area can be duplicated

A panoramic radiograph having shortened lower incisors with the occlusal plane in a

V shape indicates that the: patients chin was tilted excessively upward.

patients back was tilted excessively downward.

patient was positioned too far forward.

patient was positioned too far back. patient is wearing the thyroid collar

Which of the following statements relating to the panoramic tubehead is incorrect? The tubehead has a small round collimator to limit the size of the beam

The tubehead is angled upwards approximately 10 degrees

The tubehead travels in an arc behind the patients head, starting in themolar region on one side and ending in the molar region on the other side

The tubehead rotates 180 degrees behind the patient

The tubehead rotates around the patient on a path of sliding rotation center

After development, a panoramic radiograph shows strange artifacts that resemble

springs or boxes. Also the image appears to be reversed right to left. What happened?

wrong film type was used cassette was inserted into the machine backwards

panoramic was run in reverse direction

film was not properly aligned in cassette

Which of the following projections would normally be chosen when you want to see a

fracture of the zygomatic arch?

Waters

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PA Skull

Reverse Townes

Transcranial Submentovertex

In which of the following extraoral projections would the midsagittal plane not beperpendicular to the film (cassette)?

Lateral Ceph

Waters PA Skull

Reverse Townes

Submentovertex

For which of the following extraoral projections is the use of an intraoral x-ray

machine preferred?

Lateral Ceph

PA Skull Waters

Submentovertex None of the above

(Dent421_mid_200620071_fig08) In the picture above, the patient is set for which

extraoral projection? PA skull

AP skull

Waters view

Reversed Towns view

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Lateral skull

(Dent421_mid_200620071_fig9) The radiographic projection shown above is: Submentovertex Zygomatic arch view

Reverse Townes view

Watersview None of the above

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(Dent421_mid_200620071_fig10)The radiographic projection shown above was mainlytaken to evaluate:

The condylar necks Zygomatic arch

Maxillary sinuses Location of the condyles

Facial growth assessment

When changing from 60 kVp to 90 kVp which of the following statements is true:

Increase the effective contrast

Decrease the effective contrastLeave contrast unchanged

Increase the short scale contrast

Decrease the long scale contrast

Which of the following statements relating to film density is correct?

The size of the patients head has no bearing on film density; the patients

body size determines how light or dark the film will be. The film density produced by x-rays passing through a gold crown will be

less (lighter) than the film density produced by x-rays passing through soft

tissue

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If Patient A is a small child and Patient B is an adult, you would need to

decrease the exposure time for patient B to get the proper film density (to

match that on a film taken on Patient A); no change in mA or kVp A film with high film density will be very light, appearing underexposed

Film fogging will decrease the overall film density

(Dent421_mid_200620071_fig13) Regarding the image above, which of the followingstatements is correct?

The best contrast is at 100 kVp because of the many no. of shades that can be seen

There is long-scale contrast at 40 kVpContrast at 50 kVp is better than that at 90 kVp

Setting the machine at 80 kVp rather than 70 is best suited for looking at caries

All of the above

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(Dent421_mid_200620071_fig11) In the image above which of the following is

incorrect?

Film B is faster than film AFilm B has more contrast than film A

Film A has wider latitude than film B

Making errors in exposure is more expected using film ANone of the above

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(Dent421_mid_200620071_fig12) The lesion at the lower first molar can be described

with the following:

Periapical, radiolucent, poorly defined border, resorption, irregular

Periapical, radiopaque, poorly defined border, resorption, irregularPeriapical, radiolucent, well defined border, irregular

Periapical, radiolucent, poorly defined border, resorption, circumscribed

Pericoronal, radiolucent, poorly defined border, resorption, circumscribed

Destruction of bone surrounded by sclerosis is indicative of a malignant neoplasm

True

False

Radiologically, displacement of teeth by a lesion is a sign of a malignant process.

True

False

It is possible that the radiologic interpretation provide all the information needed for acertain case and a diagnosis can be made thenTrue

False

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(Dent421_mid_200620071_fig15) The radiographic appearance of the second molar

pointed at above is an indication of:Rarefying osteitis

Normal developing root

Root resorptionAdvanced periodontitis

None of the above

(Dent421_mid_200620071_fig14) The area pointed at in the radiograph above is showing:

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Normal alveolar crest

Vertical bone loss toward the second molar

Early periodontitisThe alveolus

The lamina dura

(Dent421_mid_200620071_fig16) The structure pointed at with the red arrow in the

radiograph is:

The inferior border of the maxillary sinusThe infraorbital rim

The zygomatic process of maxilla

The zygomatic archThe zygomatic bone

Short scale, high contrast is recommended for making radiographs to look at the

periodontal tissuesTrue

False

The radiographic signs of periodontal disease include one or more of the following

except:

CalculusHorizontal bone loss

Vertical bone loss

Furcation involvement

Loss of cortical density

Careless handling of the film in the darkroom leads to which of the following marks:

1. bending.

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2. static discharge.

3. finger nails.

4. roller marks.

1,4

2,3,41,2,3,4

1,2,3

When unit dosing is used and a blank film occurs after processing there is also usually

a __________ film present.

missing

underexposeddouble exposed

reversed

overlapping