DANB RHS FINAL EXAM SCRIPT 2026
COMPLETE QUESTIONS AND ANSWERS
◉Film Exposed to White Light Appearance: Answer: film appears
black
◉Over Exposed Film Appearance: Answer: film appears dark
◉Under Exposed Film: Answer: film appears light
◉Premolar Bite-Wing must include: Answer: Distal 1/2 canine, all
premolars present & 1st molars of the MX & MD teeth, & crestal bone
◉Incorrect Horizontal Angulation Appearance: Answer: overlapped
contact areas appear on the film
◉Cone-cut Appearance: Answer: a clear, unexposed area on the film
◉Film Bending Appearance: Answer: film appears stretched &
distorted (all or portion of film)
,◉Film Creasing Appearance: Answer: a thin radiolucent (dark) line
appears on the film (usually straight)
◉Phalangioma Appearance: Answer: patient's finger appears on the
film image
◉Double Exposure Appearance: Answer: two (double) images are
superimpose on top of each other
◉Patient movement Appearance: Answer: film image is distorted or
blurred
◉Incorrect Vertical Angulation Appearance: Answer: short teeth w/
blunted roots appear on the film (foreshortened)
◉Dropped Film Corner Appearance: Answer: the occlusal plane
appears tipped or tilted
◉Incorrect Film Placement Appearance: Answer: no apices on the film
◉Molar Bite-Wing must include: Answer: Distal 1/2 of second
premolar, all molars present, & both MX & MD molars, & crestal bone
, ◉Reversed Film Appearance: Answer: light images w/ a herringbone
pattern appear on the film
◉X-ray Machine Purpose: (2) Answer: 1- produce quality radiographs,
2- detection of disease & lesions for diagnostic purposes
◉Federal Regulations- 1968: Answer: Radiation Control for Health &
Safety Act: Standardize performance of x-ray equipment
◉Federal Regulations- 1974: Answer: 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: Answer: MN- mandatory every 2 years
◉Tube head or tube housing used to: Answer: produce x-rays
◉Extension arm used to: (3) Answer: suspend tubehead, house
electrical wires, & allows movement in all directions & positioning of
the x-ray tubehead
◉Control panel used to: (3) Answer: allows for regulation x-ray beam,
control electrical current for generation of X-rays, & house control
buttons and settings
COMPLETE QUESTIONS AND ANSWERS
◉Film Exposed to White Light Appearance: Answer: film appears
black
◉Over Exposed Film Appearance: Answer: film appears dark
◉Under Exposed Film: Answer: film appears light
◉Premolar Bite-Wing must include: Answer: Distal 1/2 canine, all
premolars present & 1st molars of the MX & MD teeth, & crestal bone
◉Incorrect Horizontal Angulation Appearance: Answer: overlapped
contact areas appear on the film
◉Cone-cut Appearance: Answer: a clear, unexposed area on the film
◉Film Bending Appearance: Answer: film appears stretched &
distorted (all or portion of film)
,◉Film Creasing Appearance: Answer: a thin radiolucent (dark) line
appears on the film (usually straight)
◉Phalangioma Appearance: Answer: patient's finger appears on the
film image
◉Double Exposure Appearance: Answer: two (double) images are
superimpose on top of each other
◉Patient movement Appearance: Answer: film image is distorted or
blurred
◉Incorrect Vertical Angulation Appearance: Answer: short teeth w/
blunted roots appear on the film (foreshortened)
◉Dropped Film Corner Appearance: Answer: the occlusal plane
appears tipped or tilted
◉Incorrect Film Placement Appearance: Answer: no apices on the film
◉Molar Bite-Wing must include: Answer: Distal 1/2 of second
premolar, all molars present, & both MX & MD molars, & crestal bone
, ◉Reversed Film Appearance: Answer: light images w/ a herringbone
pattern appear on the film
◉X-ray Machine Purpose: (2) Answer: 1- produce quality radiographs,
2- detection of disease & lesions for diagnostic purposes
◉Federal Regulations- 1968: Answer: Radiation Control for Health &
Safety Act: Standardize performance of x-ray equipment
◉Federal Regulations- 1974: Answer: 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: Answer: MN- mandatory every 2 years
◉Tube head or tube housing used to: Answer: produce x-rays
◉Extension arm used to: (3) Answer: suspend tubehead, house
electrical wires, & allows movement in all directions & positioning of
the x-ray tubehead
◉Control panel used to: (3) Answer: allows for regulation x-ray beam,
control electrical current for generation of X-rays, & house control
buttons and settings
