DANB RHS Exam Questions with 100%
Correct Answers
Unexposed Film Appearance:
clear film w/ a bluish tinge
Film Exposed to White Light Appearance:
film appears black
Over Exposed Film Appearance:
film appears dark
Under Exposed Film:
film appears light
Premolar Bite-Wing must include:
Distal 1/2 canine, all premolars present & 1st molars of the MX & MD teeth, & crestal bone
Incorrect Horizontal Angulation Appearance:
overlapped contact areas appear on the film
Cone-cut Appearance:
a clear, unexposed area on the film
Film Bending Appearance:
film appears stretched & distorted (all or portion of film)
Film Creasing Appearance:
a thin radiolucent (dark) line appears on the film (usually straight)
,Phalangioma Appearance:
patient's finger appears on the film image
Double Exposure Appearance:
two (double) images are superimpose on top of each other
Patient movement Appearance:
film image is distorted or blurred
Incorrect Vertical Angulation Appearance:
short teeth w/ blunted roots appear on the film (foreshortened)
Dropped Film Corner Appearance:
the occlusal plane appears tipped or tilted
Incorrect Film Placement Appearance:
no apices on the film
Molar Bite-Wing must include:
Distal 1/2 of second premolar, all molars present, & both MX & MD molars, & crestal bone
Reversed Film Appearance:
light images w/ a herringbone pattern appear on the film
X-ray Machine Purpose: (2)
1- produce quality radiographs, 2- detection of disease & lesions for diagnostic purposes
Federal Regulations- 1968:
Radiation Control for Health & Safety Act: Standardize performance of x-ray equipment
, Federal Regulations- 1974:
US FDA standardized all manufacturing of radiographic dental equipment (all machines must
meet this)
State Gov't Regulations determine when & how dental x-ray equipment is monitored:
MN- mandatory every 2 years
Tube head or tube housing used to:
produce x-rays
Extension arm used to: (3)
suspend tubehead, house electrical wires, & allows movement in all directions & positioning
of the x-ray tubehead
Control panel used to: (3)
allows for regulation x-ray beam, control electrical current for generation of X-rays, & house
control buttons and settings
kvP:
65-100 kVp range- peak of enegry
mA:
7-15 range- amount
Exposure time:
1/60th of a second- standard & 1/100th of a second- digital
Collimator:
Correct Answers
Unexposed Film Appearance:
clear film w/ a bluish tinge
Film Exposed to White Light Appearance:
film appears black
Over Exposed Film Appearance:
film appears dark
Under Exposed Film:
film appears light
Premolar Bite-Wing must include:
Distal 1/2 canine, all premolars present & 1st molars of the MX & MD teeth, & crestal bone
Incorrect Horizontal Angulation Appearance:
overlapped contact areas appear on the film
Cone-cut Appearance:
a clear, unexposed area on the film
Film Bending Appearance:
film appears stretched & distorted (all or portion of film)
Film Creasing Appearance:
a thin radiolucent (dark) line appears on the film (usually straight)
,Phalangioma Appearance:
patient's finger appears on the film image
Double Exposure Appearance:
two (double) images are superimpose on top of each other
Patient movement Appearance:
film image is distorted or blurred
Incorrect Vertical Angulation Appearance:
short teeth w/ blunted roots appear on the film (foreshortened)
Dropped Film Corner Appearance:
the occlusal plane appears tipped or tilted
Incorrect Film Placement Appearance:
no apices on the film
Molar Bite-Wing must include:
Distal 1/2 of second premolar, all molars present, & both MX & MD molars, & crestal bone
Reversed Film Appearance:
light images w/ a herringbone pattern appear on the film
X-ray Machine Purpose: (2)
1- produce quality radiographs, 2- detection of disease & lesions for diagnostic purposes
Federal Regulations- 1968:
Radiation Control for Health & Safety Act: Standardize performance of x-ray equipment
, Federal Regulations- 1974:
US FDA standardized all manufacturing of radiographic dental equipment (all machines must
meet this)
State Gov't Regulations determine when & how dental x-ray equipment is monitored:
MN- mandatory every 2 years
Tube head or tube housing used to:
produce x-rays
Extension arm used to: (3)
suspend tubehead, house electrical wires, & allows movement in all directions & positioning
of the x-ray tubehead
Control panel used to: (3)
allows for regulation x-ray beam, control electrical current for generation of X-rays, & house
control buttons and settings
kvP:
65-100 kVp range- peak of enegry
mA:
7-15 range- amount
Exposure time:
1/60th of a second- standard & 1/100th of a second- digital
Collimator:
