RHS DANB EXAM 2025 QUESTIONS AND
ANSWERS
Where is the most appropriate place to store dental? - ANS In a cool, dry closet
Describe patient preparation for intraoral radiography - ANS inspect the patients head and
neck for any removable metal objects (jewelry, removable dentures, hearing aids etc.)
Preparation for panoramic radiography - ANS Remove any glasses or removable prostheses,
hearing aids, jewelry, etc.
*No thyroid collar and back is exposed
What should X-ray generally include? (5 tissue types) - ANS Outermost - innermost:
Enamel
Dentin
Pulp Canal
Nerve / Blood vessel
Bone
What is the bisecting technique? - ANS The proper direction of the central ray is 90 degrees
to the imaginary bisector
what is the paralleling technique?;
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,why is it preferred? - ANS - Film aligned to the long axis of the teeth
less distortion
The use of outdated/expired dental film may cause the x-ray to have: - ANS Foggy and can
have a slightly greyish apperance
How is vertical angulation calculated in degrees? - ANS + if it angles downward
- if it angles upward
When do you take BW on children? - ANS If there is no decay, BW are done every 1- 1.5
years until permanent teeth come in, after that.. 2 years
What is the best exposure technique on children? and why? - ANS Panoramic if available,
less radiation
If a panoramic image is not available,what is the process on children exposure? - ANS 0-5 -
occlusal, posterior BW and PA
6-9 smaller FMX
10-12 full FMX
What is edentulous? - ANS partial or complete areas in the mouth with no teeth
How to properly expose edentulous patient? - ANS pano or 10-14 PA
When to use Tomography? - ANS Assess or obtain a three-dimensional view of various sites.
Possible implant or when need to know the amount of bone present
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, Disadvantages of CT? - ANS Higher doses of radiation.
-More expensive than plain radiograph
-Still limited visualization of soft tissue
What to do when it's difficult to take posterior images? - ANS take a panoramic image
What is trismus? - ANS Inability to open the jaw due to pain or infection
How to select the right receptor size? Children, Ant., Adults - ANS Children 0
Ant 1
Adults 2 -3
What's different about dual film packages? - ANS 1 for dentist, 1 for specialist, increased
radiation and slightly more expensive
What is cone beam tomography or CBCT? Primary use? - ANS Cone beam tomography is a
cone shaped x-ray beam that moves around the patients head and face 360 degrees rotation
for 10-40 seconds.
Orthodontia
When are Snap-a-rays typically used?
When do you not use Snap-a-rays? - ANS On pediatric patients, gag reflexes and situations
where distortion is not a great issue. Pre molars, molars and 3rds
Evaluations of toothless individuals or endodontic disease
How do you classify intraoral films?
What does the x mean? - ANS PA - 1.x
BW - 2.x
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ANSWERS
Where is the most appropriate place to store dental? - ANS In a cool, dry closet
Describe patient preparation for intraoral radiography - ANS inspect the patients head and
neck for any removable metal objects (jewelry, removable dentures, hearing aids etc.)
Preparation for panoramic radiography - ANS Remove any glasses or removable prostheses,
hearing aids, jewelry, etc.
*No thyroid collar and back is exposed
What should X-ray generally include? (5 tissue types) - ANS Outermost - innermost:
Enamel
Dentin
Pulp Canal
Nerve / Blood vessel
Bone
What is the bisecting technique? - ANS The proper direction of the central ray is 90 degrees
to the imaginary bisector
what is the paralleling technique?;
1 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
,why is it preferred? - ANS - Film aligned to the long axis of the teeth
less distortion
The use of outdated/expired dental film may cause the x-ray to have: - ANS Foggy and can
have a slightly greyish apperance
How is vertical angulation calculated in degrees? - ANS + if it angles downward
- if it angles upward
When do you take BW on children? - ANS If there is no decay, BW are done every 1- 1.5
years until permanent teeth come in, after that.. 2 years
What is the best exposure technique on children? and why? - ANS Panoramic if available,
less radiation
If a panoramic image is not available,what is the process on children exposure? - ANS 0-5 -
occlusal, posterior BW and PA
6-9 smaller FMX
10-12 full FMX
What is edentulous? - ANS partial or complete areas in the mouth with no teeth
How to properly expose edentulous patient? - ANS pano or 10-14 PA
When to use Tomography? - ANS Assess or obtain a three-dimensional view of various sites.
Possible implant or when need to know the amount of bone present
2 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
, Disadvantages of CT? - ANS Higher doses of radiation.
-More expensive than plain radiograph
-Still limited visualization of soft tissue
What to do when it's difficult to take posterior images? - ANS take a panoramic image
What is trismus? - ANS Inability to open the jaw due to pain or infection
How to select the right receptor size? Children, Ant., Adults - ANS Children 0
Ant 1
Adults 2 -3
What's different about dual film packages? - ANS 1 for dentist, 1 for specialist, increased
radiation and slightly more expensive
What is cone beam tomography or CBCT? Primary use? - ANS Cone beam tomography is a
cone shaped x-ray beam that moves around the patients head and face 360 degrees rotation
for 10-40 seconds.
Orthodontia
When are Snap-a-rays typically used?
When do you not use Snap-a-rays? - ANS On pediatric patients, gag reflexes and situations
where distortion is not a great issue. Pre molars, molars and 3rds
Evaluations of toothless individuals or endodontic disease
How do you classify intraoral films?
What does the x mean? - ANS PA - 1.x
BW - 2.x
3 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
