Iowa Dental Board Radiography Exam 2026 | Dental
Radiography Certification | Complete Exam Questions and
Answers Guide
Introduction
This document contains a comprehensive collection of Iowa
Dental Board Radiography exam questions and answers
covering dental radiography principles, film processing,
radiation safety, infection control, exposure techniques, image
quality, anatomy identification, digital imaging, panoramic
imaging, and quality assurance procedures. It serves as a
complete study guide for dental assistants seeking
radiography qualification, including Iowa regulations,
radiographic interpretation, troubleshooting image errors,
patient positioning, and radiation protection standards. The
material also includes practical clinical scenarios, equipment
operation, film mounting, and examination-focused review
questions.
Exam Questions and Answers
What is the purpose of processing film? --- correct precise
answer ---Turn the latent image into a visible image
What is the latent image? --- correct precise answer ---Image
formed when x-rays strike the film
,What routine steps should be performed at the start of each
day for automatic processor? --- correct precise answer ---
Check solution level and solution freshness
Turn on water if necessary and make sure water is circulating
Allow time for chemicals to heat to approximately 82 degrees
F
Process a cleaning film
How should film be fed into the automatic processor? ---
correct precise answer ---Hold the film the long way; stagger
feeding locations
What are the different sections that film moves through in an
automatic processor? --- correct precise answer ---Developer,
fixer, wash, dryer
What are functions of the fixer? --- correct precise answer ---
Neutralize developer (stop action of developer)
Harden film surface; and make the image permanent
What equipment should be present in a darkroom? --- correct
precise answer ---White light, wastebasket, lead foil container,
safelight, in use light or lock on door, sink, if manual
processing also need: tanks, film racks, drying bars,
thermometer, time/temperature chart, and stirring paddles
,If a film packet contains two films, how are they processed? --
- correct precise answer ---Must be separated and processed
individually
What should be done with the lead foil? --- correct precise
answer ---Put in a separate container for recycling
What is the difference between radiolucent and radiopaque
structures? --- correct precise answer ---Radiopaque: white
areas on the film; represent dense structures
Radiolucent: gray to black areas on the film; represent
structures that are not dense
What are some general tips that can be used to mount
radiographs? --- correct precise answer ---Tooth size:
maxillary teeth are larger
Root numbers: maxillary molars have 3 roots; mandibular
molars have 2 roots
Root orientation: most roots curve towards the distal
Jaw shape: Occlusal plane is an upward curve (curve of Spee)
Restorations and missing teeth: can use to match up same
areas
Why should the identification dot be positioned by the film
holder? --- correct precise answer ---So its on the occlusal or
incisal edge
If at the apical area, it may interfere with diagnosis
, What is a foramen? --- correct precise answer ---A hole in the
bone
Why are the identification dots all positioned convex when
mounting films? --- correct precise answer ---So you can tell
right and left sides; films are mounted with the patient's right
on your left
External oblique ridge --- correct precise answer ---Dense
white line distal to the last molar and moving across root of
molars
Internal oblique ridge --- correct precise answer ---Located
below the external oblique ridge; not as dense; ridge of bone
that extends across roots
Mandibular canal --- correct precise answer ---Border on top
and bottom by a white line; passageway for nerves and blood
vessels
Submandibular gland fossa --- correct precise answer ---
Rounded area of bone that is not as dense; serves as a space
for the submandibular salivary gland
Mental foramen --- correct precise answer ---Hole below
roots of premolars
Radiography Certification | Complete Exam Questions and
Answers Guide
Introduction
This document contains a comprehensive collection of Iowa
Dental Board Radiography exam questions and answers
covering dental radiography principles, film processing,
radiation safety, infection control, exposure techniques, image
quality, anatomy identification, digital imaging, panoramic
imaging, and quality assurance procedures. It serves as a
complete study guide for dental assistants seeking
radiography qualification, including Iowa regulations,
radiographic interpretation, troubleshooting image errors,
patient positioning, and radiation protection standards. The
material also includes practical clinical scenarios, equipment
operation, film mounting, and examination-focused review
questions.
Exam Questions and Answers
What is the purpose of processing film? --- correct precise
answer ---Turn the latent image into a visible image
What is the latent image? --- correct precise answer ---Image
formed when x-rays strike the film
,What routine steps should be performed at the start of each
day for automatic processor? --- correct precise answer ---
Check solution level and solution freshness
Turn on water if necessary and make sure water is circulating
Allow time for chemicals to heat to approximately 82 degrees
F
Process a cleaning film
How should film be fed into the automatic processor? ---
correct precise answer ---Hold the film the long way; stagger
feeding locations
What are the different sections that film moves through in an
automatic processor? --- correct precise answer ---Developer,
fixer, wash, dryer
What are functions of the fixer? --- correct precise answer ---
Neutralize developer (stop action of developer)
Harden film surface; and make the image permanent
What equipment should be present in a darkroom? --- correct
precise answer ---White light, wastebasket, lead foil container,
safelight, in use light or lock on door, sink, if manual
processing also need: tanks, film racks, drying bars,
thermometer, time/temperature chart, and stirring paddles
,If a film packet contains two films, how are they processed? --
- correct precise answer ---Must be separated and processed
individually
What should be done with the lead foil? --- correct precise
answer ---Put in a separate container for recycling
What is the difference between radiolucent and radiopaque
structures? --- correct precise answer ---Radiopaque: white
areas on the film; represent dense structures
Radiolucent: gray to black areas on the film; represent
structures that are not dense
What are some general tips that can be used to mount
radiographs? --- correct precise answer ---Tooth size:
maxillary teeth are larger
Root numbers: maxillary molars have 3 roots; mandibular
molars have 2 roots
Root orientation: most roots curve towards the distal
Jaw shape: Occlusal plane is an upward curve (curve of Spee)
Restorations and missing teeth: can use to match up same
areas
Why should the identification dot be positioned by the film
holder? --- correct precise answer ---So its on the occlusal or
incisal edge
If at the apical area, it may interfere with diagnosis
, What is a foramen? --- correct precise answer ---A hole in the
bone
Why are the identification dots all positioned convex when
mounting films? --- correct precise answer ---So you can tell
right and left sides; films are mounted with the patient's right
on your left
External oblique ridge --- correct precise answer ---Dense
white line distal to the last molar and moving across root of
molars
Internal oblique ridge --- correct precise answer ---Located
below the external oblique ridge; not as dense; ridge of bone
that extends across roots
Mandibular canal --- correct precise answer ---Border on top
and bottom by a white line; passageway for nerves and blood
vessels
Submandibular gland fossa --- correct precise answer ---
Rounded area of bone that is not as dense; serves as a space
for the submandibular salivary gland
Mental foramen --- correct precise answer ---Hole below
roots of premolars
