RHS Purpose and Technique

What can be done to stabilize the biteblock on a partially edentulous patient?

Have family member hold the biteblock

Leave the partial denture in the mouth.

Have patient hold the biteblock

Use a cotton roll

Use a cotton roll

If the patient's chin is positioned too high during a panoramic image how will the image appear?

anterior teeth will appear wide

the image will appear as an exaggerated smile

the image will appear flat or a "reverse smile"

anterior teeth will appear thin

the image will appear flat or a "reverse smile"

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

cephalometric.

panoramic.

periapical.

occlusal.

occlusal.

Which of the following anatomical landmarks is NOT normally seen on intraoral radiographs?

Mandibular canal

Maxillary sinuses

Frontal sinus

Nutrient canals

Frontal sinus

Paralleling technique requires the image receptor be placed

against the occlusal surface of the tooth.

toward the tooth, away from the oral cavity.

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

against the lingual surface of the tooth.

toward the tooth, away from the oral cavity.

Which of the following describes a double-ended PSP holder used for posterior and anterior teeth?

EndoRay®

Precision holder®

Stabe®

Eezee-Grip®

Eezee-Grip®

Which of the following landmarks would be seen in a maxilliary anterior periapical image?

Zygomatic process

Incisive foramen

Genial tubercule

Mental foramen

Incisive foramen

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

Horizontal bitewing

Occlusal

Vertical bitewing

Periapical

Vertical bitewing

The Frankfort Plane is an imaginary plane passing through the

ala of the nose to tragus of the ear.

ala of the nose to the bottom of the ear.

external auditory meatus to the floor of the orbit.

external auditory meatus to the outer canthus of the eye.

external auditory meatus to the floor of the orbit.

The most radiolucent area on an anterior image is the

nasal fossa

nasal spine

maxillary sinus

maxillary tuberosity

nasal fossa

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

Periapical

Cephalometric

Bitewing

Panoramic

Panoramic

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

1 1/8 - 1 1/4 inches.

1/8 -1/4 inches.

3/4 - 1 inches.

1/2 - 5/8 inches.

1/8 -1/4 inches

Foreshortening of the maxillary radiographic image results from

decreased vertical angulation.

increased vertical angulation.

increased horizontal angulation.

decreased horizontal angulation.

increased vertical angulation

Compared to a dentulous patient, radiographic exposure time on an edentulous adult patient should

remain unchanged

decrease

be doubled

increase

decrease

Which of the following radiograph techniques is recommended for a patient with a shallow palate?

Occlusal

Periapical

Bisecting

Paralleling

Bisecting

The most common reason for taking bitewing radiographs is to evaluate

occlusal caries.

incipient caries.

interproximal caries.

calculus.

interproximal caries.

An underexposed image will appear

grainy.

spotty.

light.

dark.

light.

When exposing a posterior periapical radiograph on an adult patient with no intraoral restrictions, which size image receptor should be used?

1

2

3

4

2

Phosphor plates are processed by using

cone-beam computed tomography.

chemical solutions.

digital sensor technology.

laser beam technology.

laser beam technology.

When documenting a lesion found on an image, all of the following should be described EXCEPT

appearance

location

severity.

size

severity

Which of the following lesions appears radiopaque on a image?

Dentigerous cyst

Metastatic carcinoma

Periapical abscess

Sclerotic bone

Sclerotic bone

The Buccal Object Rule is used to determine if a foreign body is located in which direction?

Subgingival to supragingival

Buccal to distal

Occlusal to apical

Lingual to buccal

Lingual to buccal

The most common radiographic exposure used to detect periodontal disease is a/an

periapical.

occlusal.

panoramic.

bitewing.

periapical

If a patient did not remove earrings prior to exposing a panoramic, the radiograph could have

double images.

radiolucent images.

magnified images.

ghost images.

ghost images

On a radiograph, when the contact area of one tooth is superimposed over the contact of another, it is called

overlapping.

foreshortening.

cone cutting.

elongation.

overlapping

The occlusal plane will appear diagonal in the radiograph when there is a/an

bent corner of PSP plate.

incorrect placement of image receptor.

incorrect vertical angulation.

poor horizontal angulation.

incorrect placement of image receptor.

Compared to the paralleling technique a disadvantage of the bisecting angle technique is

image distortion.

the exposure time is longer.

the image receptor is more difficult to place.

increased radiation absorption.

image distortion

Which of the following condition may mimic caries on an intraoral image?

Residual cysts of the mandible

Root resorption

Pulp stones

Secondary dentin formation

Root resorption

The primary purpose of the bitewing image is to evaluate

root surface decay.

tooth formation and eruption.

crowns and apices.

interproximal decay.

interproximal decay

Blurred radiographic images are often caused by

failure to remove dental appliances.

overlapping bitewing.

improper positioning of the x-ray tube head.

patient movement during exposure.

patient movement during exposure.

What is the term used to describe areas such as an abscess or pulp?

density

radiopaque

radiolucent

contrast

radiolucent

The edentulous radiographic series may include all of the following EXCEPT

panoramic.

periapicals.

occlusals.

bitewings.

bitewings

Processed PSP plates should be handled by the edges to prevent

cone cuts.

scratches.

contamination.

discoloration.

scratches

On a radiograph, what is the dense radiopaque band that outlines the edge of a mandibular image?

Oblique ridge

Mental protuburance

Inferior border

Mylohyoid ridge

Inferior border

Which of the following can be observed on a panoramic radiograph when the patient's chin is tipped downward?

Exaggerated smile

Anterior teeth appear widened

Narrow smile

Teeth appear superimposed

Exaggerated smile

The median palatal suture is visible on which of the following images?

Mandibular anterior periapical

Mandibular posterior periapical

Maxillary posterior periapical

Maxillary anterior periapical

Maxillary anterior periapical

Which of the following image receptor is the longest?

0

1

2

3

2

The most commonly used radiographic exposure for a 3-year old patient is

bitewing.

panoramic.

periapical.

cephalometric.

bitewing.

A panoramic radiograph with a dark shadow over the apices of the maxillary teeth may be caused by the patient

placing the tongue against the palate

not placing the tongue against the palate.

not appropriately positioned in the focal trough.

not biting on the bite block correctly.

not placing the tongue against the palate

Before exposing radiographs on a minor, the dental assistant should

explain radiographs are mandatory for all patients.

obtain consent from parent or legal guardian.

explain radiographs are required by insurance.

obtain consent from the patient.

obtain consent from parent or legal guardian

Patients should wear a thyroid collar during which type of radiographic exposure?

Panoramic radiograph

Extraoral radiograph

Cephalometric radiograph

Intraoral radiograph

Intraoral radiograph

When placing periapical images in a template, what information helps to distinguish maxillary molar images from mandibular molar images?

The maxillary sinus outline is visible.

The mandibular molars are larger.

The maxillary molars have two roots.

The mandibular second molar has one root.

The maxillary sinus outline is visible

When exposing a panoramic image on an edentulous patient, which of the following would a dental assistant use to stabilize the upper and lower arch on the bite block?

Head positioners

Chin rest

Cotton rolls

Separators

Cotton rolls

A panoramic image appears to have a "reverse smile" when the

midsagittal plane is angled to the left.

midsagittal plane is angled to the right.

Frankfort plane is angled downward.

Frankfort plane is angled upward.

Frankfort plane is angled upward

Where is the most common area in the oral cavity for a dentigerous cyst?

Around the third molars

Between the central incisors

Between the premolars

Around the canines

Around the third molars

Which size image receptor would be used for an adult posterior periapical film?

0

2

3

4

2

A full mouth series of periapical images taken on an edentulous patient will consist of

six anterior and four posterior.

two anterior and four posterior.

six anterior and eight posterior.

two anterior and eight posterior.

six anterior and eight posterior.

The use of a thyroid collar is recommended for all of the following radigraphic exposures EXCEPT

panoramic.

occlusal.

bitewing.

periapical.

panoramic.

Which of the following is a disadvantage of panoramic radiographs?

Higher cost of equipment

Lower cost of equipment

Less radiation exposure

More radiation exposure

Higher cost of equipment

Which of the following exposures is used to diagnose interproximal caries?

Panoramic

Cephalometric

Bitewing

Periapical

Bitewing

When taking a panoramic radiograph, the patient's head should be oriented

with the chin tipped up.

with the chin projected forward.

with the midsagittal plane perpendicular to the floor.

so that it is rotated toward the image receptor.

with the midsagittal plane perpendicular to the floor

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

Periapical

Bitewing

Cephalometric

Panoramic

Panoramic

Which of the following describes how most carious lesions appear on an image?

Radiolucent

Undetectable

Radiopaque

Mixed density

Radiolucent

If a patient's gag reflex is stimulated during the radiographic procedure, the dental assistant should

avoid small talk to help him or her relax.

ask the patient if he or she is a gagger.

apply distraction techniques to divert his or her attention.

tell the patient it is all in his or her mind.

apply distraction techniques to divert his or her attention

Prior to exposing dental radiographs on a visually impaired patient, the dental assistant should

use touch to explain the equipment and procedure.

set the exposure time to increase radiation.

set the exposure time to decrease radiation.

ask the caregiver to stabilize the image receptor.

use touch to explain the equipment and procedure

Which of the following results in a double image on a PSP radiograph?

Processing two unexposed plates together

Processing two exposed plates together

Exposing the same PSP twice

Exposing sensor twice

Exposing the same PSP twice

Compared to radiopaque structures, radiolucent structures

appear light on a radiograph

appear dark on an image

are dense

absorb more radiation

appear dark on an image

The primary function of collimation is to

increase target-receptor distance.

decrease target-receptor distance.

restrict the size of the beam.

eliminate cone cuts.

restrict the size of the beam.

Which size image receptor, when placed vertically in the anterior region of the mouth, is most effective for evaluating caries and periodontal health?

0

2

3

4

2

Which of the following radiolucencies may be mistaken for caries?

Gingivitis

Anatomic configurations

Cervical burnout

Calculus

Cervical burnout

On a full mouth series with eighteen images, how many anterior images are exposed?

5

6

7

8

6

To reduce the patient's anxiety about radiographic exposure the dental assistant should

rapidly complete the procedure.

only take panoramic images.

use intra-oral photography.

take time to explain the procedure.

take time to explain the procedure.

The amount of radiation and exposure time needed to produce a diagnostic radiograph is best determined by

exposure time.

kVp.

mA.

image receptor size.

exposure time.

Which of the following landmarks are located by the midline of the mandible?

Mandibular foramen

Mental foramen

Genial tubercles

Mandibular canal

Genial tubercles

Which of the following is a disposable intraoral PSP holder device?

Rinn XCP®

Stabe®

Eezee grip®

Endoray®

Stabe®

To assist the patient in controlling the gag reflex, the dental assistant should

use a distraction technique.

ask the patient to return tomorrow.

ask the dentist to anesthetize the patient.

expose extraoral images only.

use a distraction technique.

Which of the following structures would appear radiopaque on a dental radiograph?

Air space

Periodontal ligament

Bone

Pulp tissue

Bone

The best way to correct a conecutting error is to adjust

horizontal angulation.

PID/cone position.

vertical angulation.

patient positioning.

PID/cone position.

A cephalometric radiograph is PRIMARILY used to evaluate

implant placement.

periodontal disease.

temporal mandibular joint.

lateral jaw development.

lateral jaw development

Which of the following causes elongation?

Incorrect vertical angulation

Incorrect horizontal angulation

Incorrect exposure settings

Incorrect size of image receptor

Incorrect vertical angulation

Which of the following is automatically labeled on the computer template for an image?

Dental assistant name

Dentist name

Patient address

Date of image

Date of image

Light-colored radiographs commonly result from

overdevelopment.

holding the exposure button too long.

underexposure.

excessive kVp.

underexposure

To view an abscess on tooth #25, the best radiographic exposure is a/an

occlusal.

periapical.

bitewing.

panoramic.

periapical.

When using a 16-inch PID compared to an 8-inch PID the exposure time must

remain the same.

be increased.

be decreased.

be increased.

Which of the following causes the interproximal areas of the teeth to appear overlapped?

Patient with shallow palate

Improper vertical angulation

Patient talking during exposure

Improper horizontal angulation

Improper horizontal angulation

To help desensitize the tissue prior to image receptor placement, the dental assistant should

place the receptor in dental assistant's's mouth to demonstrate.

rub a finger along the tissues where the receptor touches.

expose the most anterior image first.

touch the palate with the receptor.

rub a finger along the tissues where the receptor touches

A radiograph will automatically be retaken when there is a

cone cut.

scratched plate.

bent plate.

double exposure.

double exposure.

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

Waters projection

Posteroanterior projection

Lateral jaw projection

Reverse Towne projection

Lateral jaw projection

Why is it important for the patient to stand up straight when taking a panoramic image?

To prevent a double image

To prevent the spine from being superimposed over the anterior teeth

To prevent the anterior teeth from being wide and blurry

To prevent anterior teeth from appearing thin and overlapped

To prevent the spine from being superimposed over the anterior teeth

Most bilateral findings in images are considered

most often seen on panoramic views.

suspect of a lesion.

primarily seen in bitewing views.

normal anatomic landmarks.

normal anatomic landmarks

On an anterior image, the anterior alveolar crest normally appears

pointed and sharp

as a triangular-shaped radiopacity

as a dense radiopaque line

flat and smooth

pointed and sharp

What are common uses for a CBCT 3D image?

determining decay in teeth

identifying an apical abscess

determining bone structure and tooth orientation

determining periodontal disease

determining bone structure and tooth orientation

Which of the following errors occur when the vertical angulation is incorrect?

Overlapping

Cone cut

Blurred image

Elongation

Elongation

Which of the following would cause elongation on a radiograph?

Excessive vertical angulation

Insufficient horizontal angulation

Insufficient veritical angulation

Excessive horizontal angulation

Insufficient veritical angulation

Which of the following would cause a radiopaque artifact on a radiograph?

Provisional restoration

Soft tissue surrounding the bone

Metallic partial denture

Soft tissues of the buccal mucosa

Metallic partial denture

Which of the following influences the sharpness of a radiograph?

Object-receptor alignment

X-ray beam angulation

Focal spot size

kVp and mA

Focal spot size

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

occlusal.

periapical.

panoramic.

bitewing.

periapical.

Dilaceration in a radiographic image indicates the

vertical angulation needs to be increased.

vertical angulation needs to be decreased.

image receptor was over-bent during placement.

root shape is abnormally bent or curved.

root shape is abnormally bent or curved.

Cone beam computed tomography uses

two-dimensional technology.

three-dimensional technology.

panoramic cassettes.

customized image holders.

three-dimensional technology.

How is scatter radiation reduced when taking an image?

Use of receptor holder

Use of rectangular cone

Use of short cone

Use of round cone