DANB RHS review + practice

practice

When taking an occlusal radiograph, the PSP packet should extend from the patient's mouth by approximately.

1/2 - 5/8 inches.

1/8 -1/4 inches.

1 1/8 - 1 1/4 inches.

3/4 - 1 inches.

1/8 - 1/4 inches

Which radiograph is used to diagnose interproximal caries?

bitewing

Phosphor plates are processed by using

laser beam technology

Impacted third molars are best seen with what type of radiograph?

Bitewing

Periapical

Panoramic

Cephalometric

panoramic radiograph

How do most carious lesions appear on an image?

Undetectable

Radiopaque

Radiolucent

Mixed density

radiolucent

The most common radiographic exposure used to evaluate a dental implant on an adult is

periapical

occlusal

bitewing

panoramic

panoramic radiographs

Paralleling technique requires the image receptor be placed

against the occlusal surface of the tooth.

against the lingual surface of the tooth.

away from the tooth, toward the middle of the oral cavity.

toward the tooth, away from the oral cavity.

away from the tooth, toward the middle of the oral cavity

On an anterior image, the anterior alveolar crest normally appears

pointed and sharp

as a dense radiopaque line

as a triangular-shaped radiopacity

flat and smooth

pointed and sharp

The dense radiopaque band that outlines the edge of a mandibular image is the

Mental protuberance

Inferior border

Mylohyoid ridge

Oblique ridge

inferior border

What is the most common radiographic exposure used to detect periodontal disease?

bitewing.

periapical.

occlusal.

panoramic.

bitewing

which term is used to describe abscess or pulp on a radiograph

radiopaque
radiolucent
density
contrast

radiolucent

Which device is a disposable intraoral PSP holder?

Rinn XCP®

Endoray®

Eezee grip®

Stabe®

stabe®

double ended film holder

Rinn XCP®

Endoray®

Eezee grip®

Stabe®

Eezee grip®

What influences the sharpness of a radiograph?

X-ray beam angulation

Object-receptor alignment

Focal spot size

kVp and mA

focal spot size

Impacted third molars are best seen with what type of radiograph?

Panoramic

Periapical

Bitewing

Cephalometric

panoramic

Which landmark is seen in a maxillary anterior periapical image?

Genial tubercule

Incisive foramen

Zygomatic process

Mental foramen

incisive foramen

Which extraoral radiograph is used to evaluate impacted teeth, large lesions and fractures of the mandible?

Lateral jaw projection

Waters projection

Posteroanterior projection

Reverse Towne projection

Lateral jaw projection

Supernumerary teeth are best detected using what type of image receptor?

Cephalometric

Periapical

Bitewing

Panoramic

panoramic

Which image would be used to see the relationship of the alveolar bone?

Occlusal

Horizontal bitewing

Vertical bitewing

Periapical

vertical bitewing

The most radiolucent area on an anterior image is the

maxillary sinus

maxillary tuberosity

nasal fossa

nasal spine

nasal fossa

The edentulous radiographic series may include all the following EXCEPT

bitewings.

occlusals.

panoramic.

periapicals.

bitewings

What radiographic technique is recommended for a patient with a shallow palate?

Periapical

Paralleling

Occlusal

Bisecting

bisecting

The BEST radiograph to evaluate a suspected salivary stone in the submandibular gland is a/an

periapical.

panoramic.

cephalometric.

occlusal.

occlusal

Which of the following will best protect the dental assistant from cross-contamination while exposing radiographs?

a. Film holding devices

b. barriers on PID

c. Patient bib

d. Gloves

gloves

After the completion of a radiographic procedure, the PID should be

• a. disinfected

• b. dried

• c. exposed

• d. sterilized

disinfected

The primary disadvantage of the bisecting technique is:

• a. Longer exposure time

• b. Dimensional distortion of the teeth

• c. Requirements of a receptor holder

• d. Greater magnification

dimensional distortion of the teeth

In bisecting technique, which angle is being bisected?

• a. The angle between the image receptor and the long axis of the tooth

• b. The angle between the central ray and the long axis of the tooth

• c. The angle between the image receptor and the central ray

• d. The angle that is perpendicular to the image receptor

• The angle between the image receptor and the long axis of the tooth

The dentist says that the image has too much density. What adjustment would you make?

 

• a. Increase mA.

• b. Increase kVp

• c. Decrease kVp

• d. Decrease mA

Decrease mA

Which appears most radiopaque on a dental image?

• a. pulp

• b. enamel

• c. dentin

• d. sinus

enamel

The difference in the degrees of blackness between adjacent areas on a dental radiograph is termed

• a. contrast

• b. density

• c. distortion

• d. penumbra

contrast

To produce ionizing radiation, an atom must

lose a proton

add a proton

lose a neutron

add an electron

add an electron

Contrast in a digital image primarily controlled by

mA

kVp

Exposure time

Size of sensor

Kvp

According to the inverse square law, when changing the PID length from 8 to 16 inches, the beam's intensity is

¾ as intense

4 times as intense

2 times as intense

¼ as intense

¼ as intense

Leakage radiation is any radiation that is

From the primary beam

From the secondary beam

Received from the operator

Received from the patient

Primary beam

Somatic effects (effects only the individual) of radiation do NOT have damaging effects on

Bone marrow

Offspring

Blood cells

The patient

Offspring

What is the thickness of the collimator?

1.75 inches

1.25 inches

2.75 inches

2.25 inches

2.75 inches

What is the thickness of aluminum filtration?

1.5 mm

2.5 mm

3.25 mm

2.25 mm

2.5 mm

What is the purpose of aluminum filtration?

removes low energy, long-wavelength x-rays

An instrument that contacts mucous membranes but does not penetrate soft tissues or bone is considered __

Semi-critical

You are using a complete series of dental images to educate your patient on the value of radiography. According to HIPAA, what should not be present in or on the film mount?

The patient’s name.

Which of the following statements about the panoramic dental radiography is FALSE?

a. The vertical angulation of the panoramic tube head is not adjustable

b. The tube head of the panoramic unit always rotates in front of the patient's head

c. Screen type film must be used during panoramic radiography

d. intensifying screens must be used during panoramic radiography

b. The tube head of the panoramic unit always rotates in front of the patient's head

All of the can be adjusted prior to exposing a panoramic radiograph EXCEPT:

a. milliamperage

b. kilovoltage
c. exposure time
d. patient positioning

exposure time

Which of the following causes overlapping?

a. Inadequate vertical angulation
b. Decreased vertical angulation
c. Central ray not perpendicular to the teeth
d. Patient movement

Central ray not perpendicular to the teeth

Which of the following will cause foreshortening?

a. Inadequate vertical angulation

b. Inadequate horizontal angulation

c. Too much vertical angulation

d. Incomplete coverage of the image receptor

too much vertical angulation