RHS Exam Prep Comprehensive
Questions (Frequently Tested)
with Verified Answers Graded
A+
periapical - Answer: radiographic image showing the crown, root tip, & surrounding structures
periapical radiographs used to detect: - Answer: any abnormalities of the root structure &
surrounding bone structure
Bitewing radiograph - Answer: image view showing the crowns of both arches on one film
bitewing radiographs used to detect: - Answer: or monitor interproximal caries if the proximal
surfaces of the teeth cannot be visually tactilely examined
full mouth series radiograph - Answer: is composed of a series of individual images, including a
combination of bitewing & periapical
purpose of full mouth series: - Answer: as a baseline on the health of your mouth
Occlusal radiograph - Answer: image that shows large areas of the maxilla or mandible
,Occlusal radiograph purpose: - Answer: help track the development & placement of a section or
entire arch of teeth in the upper or lower jaw
panoramic radiograph - Answer: provides full view of the upper & lower jaw
panoramic radiograph purpose - Answer: allows us view your head, neck, & jaw, & how they
work together as a whole
Cephalometric radiograph - Answer: extraoral radiograph of the bones & tissues of the head
Cephalometric radiograph purpose - Answer: enables the dentist to capture a complete
radiographic image of the side of the face
CBCT (cone beam computed tomography) - 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 - Answer: allows accurate, three dimensional
(3D) imaging of hard tissue structures
Radiolucent - Answer: - portion of an image that is dark or black;
- the passage of x-rays w/relatively little attenuation by absorption
Radiopaque - Answer: - portion of an image that appears light or white
- strongly inhibiting the passage of x-rays
Phosphor plates are processed by using: - Answer: laser beam technology
Most bilateral findings in images are considered: - Answer: normal anatomic landmarks
, Impacted third molars are best seen w/what type of radiograph? - Answer: Panoramic
Which of the following is automatically labeled on the computer template for an image? -
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: - 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: - Answer: 1.5 mm
Foreshortening of the maxillary radiographic image results from: - 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: - Answer: intermediate-level disinfectant
Dilaceration in a radiographic image indicates the: - Answer: root shape is abnormally bent or
curved
Somatic effects of radiation do NOT have damaging effects on: - Answer: offspring
Which of the following will best protect the dental assistant from cross-contamination while
exposing radiographs? - Answer: Gloves
The time between patient exposure to radiation & the appearance of biological damage is the: -
Answer: latent period
Questions (Frequently Tested)
with Verified Answers Graded
A+
periapical - Answer: radiographic image showing the crown, root tip, & surrounding structures
periapical radiographs used to detect: - Answer: any abnormalities of the root structure &
surrounding bone structure
Bitewing radiograph - Answer: image view showing the crowns of both arches on one film
bitewing radiographs used to detect: - Answer: or monitor interproximal caries if the proximal
surfaces of the teeth cannot be visually tactilely examined
full mouth series radiograph - Answer: is composed of a series of individual images, including a
combination of bitewing & periapical
purpose of full mouth series: - Answer: as a baseline on the health of your mouth
Occlusal radiograph - Answer: image that shows large areas of the maxilla or mandible
,Occlusal radiograph purpose: - Answer: help track the development & placement of a section or
entire arch of teeth in the upper or lower jaw
panoramic radiograph - Answer: provides full view of the upper & lower jaw
panoramic radiograph purpose - Answer: allows us view your head, neck, & jaw, & how they
work together as a whole
Cephalometric radiograph - Answer: extraoral radiograph of the bones & tissues of the head
Cephalometric radiograph purpose - Answer: enables the dentist to capture a complete
radiographic image of the side of the face
CBCT (cone beam computed tomography) - 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 - Answer: allows accurate, three dimensional
(3D) imaging of hard tissue structures
Radiolucent - Answer: - portion of an image that is dark or black;
- the passage of x-rays w/relatively little attenuation by absorption
Radiopaque - Answer: - portion of an image that appears light or white
- strongly inhibiting the passage of x-rays
Phosphor plates are processed by using: - Answer: laser beam technology
Most bilateral findings in images are considered: - Answer: normal anatomic landmarks
, Impacted third molars are best seen w/what type of radiograph? - Answer: Panoramic
Which of the following is automatically labeled on the computer template for an image? -
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: - 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: - Answer: 1.5 mm
Foreshortening of the maxillary radiographic image results from: - 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: - Answer: intermediate-level disinfectant
Dilaceration in a radiographic image indicates the: - Answer: root shape is abnormally bent or
curved
Somatic effects of radiation do NOT have damaging effects on: - Answer: offspring
Which of the following will best protect the dental assistant from cross-contamination while
exposing radiographs? - Answer: Gloves
The time between patient exposure to radiation & the appearance of biological damage is the: -
Answer: latent period
