RHS exam prep Question and answers
correctly solved 2025/2026
periapical - correct answer ✔radiographic image showing the crown, root tip, & surrounding structures
periapical radiographs used to detect: - correct answer ✔any abnormalities of the root structure &
surrounding bone structure
Bitewing radiograph - correct answer ✔image view showing the crowns of both arches on one film
bitewing radiographs used to detect: - correct answer ✔or monitor interproximal caries if the proximal
surfaces of the teeth cannot be visually tactilely examined
full mouth series radiograph - correct answer ✔is composed of a series of individual images, including a
combination of bitewing & periapical
purpose of full mouth series: - correct answer ✔as a baseline on the health of your mouth
Occlusal radiograph - correct answer ✔image that shows large areas of the maxilla or mandible
Occlusal radiograph purpose: - correct answer ✔help track the development & placement of a section
or entire arch of teeth in the upper or lower jaw
panoramic radiograph - correct answer ✔provides full view of the upper & lower jaw
panoramic radiograph purpose - correct answer ✔allows us view your head, neck, & jaw, & how they
work together as a whole
,Cephalometric radiograph - correct answer ✔extraoral radiograph of the bones & tissues of the head
Cephalometric radiograph purpose - correct answer ✔enables the dentist to capture a complete
radiographic image of the side of the face
CBCT (cone beam computed tomography) - correct answer ✔three dimensional digital imaging method
that uses a cone-shaped beam of radiation that rotates around the patient
CBCT (cone beam computed tomography) purpose - correct answer ✔allows accurate, three
dimensional (3D) imaging of hard tissue structures
Radiolucent - correct answer ✔- portion of an image that is dark or black;
- the passage of x-rays w/relatively little attenuation by absorption
Radiopaque - correct answer ✔- portion of an image that appears light or white
- strongly inhibiting the passage of x-rays
Phosphor plates are processed by using: - correct answer ✔laser beam technology
Most bilateral findings in images are considered: - correct answer ✔normal anatomic landmarks
Impacted third molars are best seen w/what type of radiograph? - correct answer ✔Panoramic
Which of the following is automatically labeled on the computer template for an image? - correct
answer ✔Date of image
, The main purpose of using a lead apron w/a thyroid collar when exposing dental radiographs is to
protect the patient from: - correct answer ✔scatter radiation
For x-ray machines operating in ranges at or below 70 kVp, the total aluminum equivalent filtration must
be a minimum of: - correct answer ✔1.5 mm
Foreshortening of the maxillary radiographic image results from: - correct answer ✔increased vertical
angulation
After a patient has been dismissed, dental unit surfaces & counter tops that may have been
contaminated should be cleaned w/an EPA-registered: - correct answer ✔intermediate-level
disinfectant
Dilaceration in a radiographic image indicates the: - correct answer ✔root shape is abnormally bent or
curved
Somatic effects of radiation do NOT have damaging effects on: - correct answer ✔offspring
Which of the following will best protect the dental assistant from cross-contamination while exposing
radiographs? - correct answer ✔Gloves
The time between patient exposure to radiation & the appearance of biological damage is the: - correct
answer ✔latent period
Which of the following cells exposed to radiation may be associated w/leukemia? - correct answer
✔somatic
When documenting a lesion found on an image, all of the following should be described EXCEPT: -
correct answer ✔severity
correctly solved 2025/2026
periapical - correct answer ✔radiographic image showing the crown, root tip, & surrounding structures
periapical radiographs used to detect: - correct answer ✔any abnormalities of the root structure &
surrounding bone structure
Bitewing radiograph - correct answer ✔image view showing the crowns of both arches on one film
bitewing radiographs used to detect: - correct answer ✔or monitor interproximal caries if the proximal
surfaces of the teeth cannot be visually tactilely examined
full mouth series radiograph - correct answer ✔is composed of a series of individual images, including a
combination of bitewing & periapical
purpose of full mouth series: - correct answer ✔as a baseline on the health of your mouth
Occlusal radiograph - correct answer ✔image that shows large areas of the maxilla or mandible
Occlusal radiograph purpose: - correct answer ✔help track the development & placement of a section
or entire arch of teeth in the upper or lower jaw
panoramic radiograph - correct answer ✔provides full view of the upper & lower jaw
panoramic radiograph purpose - correct answer ✔allows us view your head, neck, & jaw, & how they
work together as a whole
,Cephalometric radiograph - correct answer ✔extraoral radiograph of the bones & tissues of the head
Cephalometric radiograph purpose - correct answer ✔enables the dentist to capture a complete
radiographic image of the side of the face
CBCT (cone beam computed tomography) - correct answer ✔three dimensional digital imaging method
that uses a cone-shaped beam of radiation that rotates around the patient
CBCT (cone beam computed tomography) purpose - correct answer ✔allows accurate, three
dimensional (3D) imaging of hard tissue structures
Radiolucent - correct answer ✔- portion of an image that is dark or black;
- the passage of x-rays w/relatively little attenuation by absorption
Radiopaque - correct answer ✔- portion of an image that appears light or white
- strongly inhibiting the passage of x-rays
Phosphor plates are processed by using: - correct answer ✔laser beam technology
Most bilateral findings in images are considered: - correct answer ✔normal anatomic landmarks
Impacted third molars are best seen w/what type of radiograph? - correct answer ✔Panoramic
Which of the following is automatically labeled on the computer template for an image? - correct
answer ✔Date of image
, The main purpose of using a lead apron w/a thyroid collar when exposing dental radiographs is to
protect the patient from: - correct answer ✔scatter radiation
For x-ray machines operating in ranges at or below 70 kVp, the total aluminum equivalent filtration must
be a minimum of: - correct answer ✔1.5 mm
Foreshortening of the maxillary radiographic image results from: - correct answer ✔increased vertical
angulation
After a patient has been dismissed, dental unit surfaces & counter tops that may have been
contaminated should be cleaned w/an EPA-registered: - correct answer ✔intermediate-level
disinfectant
Dilaceration in a radiographic image indicates the: - correct answer ✔root shape is abnormally bent or
curved
Somatic effects of radiation do NOT have damaging effects on: - correct answer ✔offspring
Which of the following will best protect the dental assistant from cross-contamination while exposing
radiographs? - correct answer ✔Gloves
The time between patient exposure to radiation & the appearance of biological damage is the: - correct
answer ✔latent period
Which of the following cells exposed to radiation may be associated w/leukemia? - correct answer
✔somatic
When documenting a lesion found on an image, all of the following should be described EXCEPT: -
correct answer ✔severity
