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Final 21 22 23

Dental Radiography FINAL 07/08/2014

TermDefinition
Wilhelm Conrad Roentgen He discovered the first X-RAY in 1895
Primary Radiation Central beam that comes from the X-Ray tubehead
Secondary Radiation When the primary X-Rays hit the patient or contact matter
Scatter Radiation Deflected from its path as it strikes matter. most dangerous to operators, so 6 ft of clearance is necessary
Leakage Radiation leaks in all directions from the tubehead
M.P.D (maximum permissible dose) maximum amounts of radiation that wouldn't be expected to produce any significant effects in a lifetime. Amount is 0.05 SV (5.0 REMs)
Dosimeter Badge Must be worn at all times in the dental office. used t monitors an individuals radiation exposure in the office
Kilovoltage the quality or penetrating power of the central beam. the higher the KV the higher the power
miliamperage the amount or quality of electrons
Control Panel the circuit board and controls that allow the operator to adjust the correct setting for each patient
Collimeter a lead disk with an opening in the middle that reconstructs the beam and filters out additional weak rays
Density the degree of darkness on an X-ray
Contrast The difference between the shades of gray
Least Sensitive kidney, muscle, nerves
Less Sensitive mature bone, salivary glands and liver
Moderately Sensitive Skin, intestinal tract, oral mucosa
Most Sensitive lymphnoid, reproductive cells, bone marrow, intestinal epithelium, thyroid
Sensitive connective tissue and growing bone
Film Sensitivity stray radiation, high temperature, chemicals
Cone Cutting X-Ray beam missed part of the film
Elongation vertical angulation error caused by to little angulation
Foreshortening vertical angulation error caused by to much angulation
Overlapping angled toward the mesial or distal surfaces
Dark Film over developing, developing solution to high/low, solution is to strong or when the film is left in the developer to long
Fogged Film gray image, image detail is lost contrast is lessened
Partial Image film placement in the processing tanks when the solution levels are low
Film Artifacts images found on the X-ray that are not part of the normal anatomy or pathology
Clear Film there is no image on the film caused by no exposure
Double Exposure indistinct images or dark X-ray. can be avoided by keeping the film sperated
Blurred Image movement from the patients head, the tubehead or the X-ray film moving around in the patients mouth
Light Film under processed. can occur while exposing film and during processing
Brown Stain improper/ insufficient washing or rinsing of the film during the processing sequence
streaks On Film unclean rollers or X-ray racks
Automatic Processor Temperature Between 82*-95* degrees F
Periapical Views pictures the entire tooth and surrounding areas. used to assess the health of the tooth, bone and tissues
Cephalometric used to assess the patients skeletal structure and profile
Shades Of Gray a computer can display over 200 different shades but the human eye can only detect 32
Gray Scale important for determining the condition or the teeth, tissues and surrounding bone
Focal Trough also known as an "image layer" or "sharpness" is a 3D curved zone in which dental arches are positioned to achieve the sharpest image
Crystals the larger the crystals the faster the film
Bite-Wing Radiographs pictures the crown, interproximal space and the crest area of the alveolar bone on the maxilla/mandible teeth
Occlusal Radiographs shows large areas of the dental arch placed on the occlusal surface./ used to locate fractures, impacted teeth, foreign bodies and identifying the ocation of other artificats
Tomography the imaging of one layer or section of the body while blurring images from other areas. the principle of panoramic radiographs
Panoramic Radiographs show the entire maxilla and mandible on one film
Intensifying Screens what the cassettes for panoramic radiographs are lined with. phosphor is used on the screens which emits light when struck y X-rays green are rare earth and blue are calcium tungstate
Extraoral Radiograph used by dentist to identify large areas of the skull on one film
Digital Advantages less radiation to patient, appears on the monitor immediately, patient can view while doctor explains, less space for storage, darkroom, processing equipment, and solution eliminated and easily coppied
Digital Disadvantages the cost, extra time in training, uncomfortable for patient, updates and viruses plus infection control
3D Shows complete/ partial skull fields of view. used to produce digital panoramic and cephalometric images, 3D photos and CBVT & CBVI
Created by: red112409