Chapters 21.22.23
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Focal Spot | small spot on the TUNGSTEN TARGET where the electrons hit
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| Collimator | a lead disc with an opening in the middle that reconstructs the beam and filters out additional weak rays
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| Film Sizes | 0. Child
1. Narrow Anterior Film
2. Adult
3. Long Bite-Wing
4. Occlusal
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| X-ray Film Is Sensitive To? | stray radiation, high temperatures and chemicals
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| Contrast | the difference between the shades of gray
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| Density | the degree of darkness on x-ray (gray scale)
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| What Equals More Energy? | SHORT WAVELENGTH W/ HIGH FREQUENCY = MORE ENERGY
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| Lead Apron/ Thyroid Collar | all patients should receive a lead apron and thyroid collar when being exposed to radiation
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| Primary Radiation | central beam that comes from the x-ray tube head
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| Scatter Radiation | deflected from its path as matter
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| Secondary Radiation | when the primary x-rays strike the patient or contact matter
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| Leakage Radiation | radiation leaks in all directions from the tube head
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| MOST SENSITIVE | Lymphoid, Reproductive cells, bone marrow, intestinal epithelium, thyroid
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| LEAST SENSITIVE | kidney, muscle, nerves
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| LESS SENSITIVE | mature bone, salivary glands, liver
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| MODERATLY SENSITIVE | skin, intestinal track, oral mucosa
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| SENSITIVE | connective tissues, growing bone
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| MPD (Maximum Permissible Dose) | 0.05 SV or 5 rems
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| Latent Period | the period between direct exposure and the development of biological effects
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| Dosimeter Badge | must be worn at all time in the dental office
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| Kilovoltage | the quality or penetrating power of the central beam. the higher the KV the stronger the power. common setting for KV is from 70-90
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| Miliamperage | the amount or quality of electrons
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| Paralleling Technique | Parallel to the long axis of the tooth
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| Bisecting Technique | used to expose Periapical, bite-wing, and occlusal radiographs
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| Periapical Radiograph | pictures the entire tooth
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| Elongation | Caused by TOO LITTLE ANGULATION
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| Foreshortening | Caused by TOO MUCH ANGULATION
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| Overlapping | incorrect horizontal (mesial or distal) placement
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| Cone Cutting | x-ray beam missed part of the film
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| Clear Film | the film was not exposed to radiation
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| Blurred Image | movement of the patients head or x-ray tube head or from the x-ray moving in the patients mouth
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| Herring Bone Pattern | tire tracks appear when the x-ray film is backward in the patients mouth
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| Light Film | under processed, occurs while exposing film and during processing
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| Dark Film | over developed, occurs when developing solution temperature is to high/low, its to strong or the film was left in the developer for to long
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| Brown Stain | improper/ insuficient rinsing or washing of the film during the processing sequence
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| Streaks On The Film | due to unclean rollers or x-ray rash
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| 65-70 Degrees | ideal temperature for develpoing solution
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| 82-95 Degrees | temperature for the automatic processor
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| Routine X-ray Intervals | 6 months to 12 months
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| Computer Monitor : Human Eye | 200 : 32
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| Advantages Of Digital | 1. frees up space for storage
2. less radiation to the patient
3. patient can view the x-ray while operator explains
4. immediate results
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| Disadvantages Of Digital | 1. system failures
2. cost and trainging of employees
3. infection control (lack there of)
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| Intensifying Screens | what cassettes are lined with
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| Panoramic Views | entire dentition, nasal orbital areas, alveolar bone and carious lesions
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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