Card Set Information

2010-12-15 18:37:45
Review week five

ch. five, eleven, twenty five
Show Answers:

  1. How often are bitewings recommended every year for dentulous patients? for no high risk factor children (even if you can't see area)?
    • 12-36
    • 12-24
  2. true or false. The recommendations for prescribing dental radiographs do not need to be altered because of pregnancy
  3. If you are using 70 kVp, how much aluminum filtration is needed?
    2.5 mm
  4. used to restrict the size and shape of the x-ray beam, and most importantly, reduce pt radiation exposure
  5. type of collimator that restricts the size of the x-ray beam to an area lightly larger than a size 2 film
    rectangular collimator
  6. which is better: circular or rectangular collimator, 8 inch length PID or 16 inche length PID?
    • rectangular
    • 16 inch
  7. true or fase. They thyroid collar protects the highly radiosensitive tissue of the thyroid gland, and it also may be removable
    both statements are true
  8. What is the most significant method of reducing a patients exposure to radiation?
    fast film
  9. the radiographer must stand ________ or at a ___________ angle, and atleast ____ feet away from the beam
    • perpendicular
    • 90*
    • 6 feet
  10. personal monitering device; obtained from a special company; worn at waist level whenever exposing films; stored in a radiation safe area when not worn; sent back to service company for evaluation
    film badge
  11. Maximum dose equivalent that a body is permitted to recieve in a specific period of time; the dose of radiation that the body can endure with little or no injury
    Maximum permissable dose (MPD)
  12. MPD for occupationally exposed persons
    5 rem/yr
  13. MPD for nonoccupationally exposed persons and for an occupationally exposed pregnant woman
    .1 rem/yr
  14. Radiation dose that an occupationally exposed person accumulates in their lifetime, and must not exceed
    maximum accumulated dose (MAD)
  15. What does the ALARA concept state?
    • all exposure to radiation must be kept to a minumum or:
    • as low as reasonable achievable
  16. What does a dental radiograph detect that can't be detected clinically?
    • diseases
    • lesions
    • conditions of teeth that can't be identified clinically:
    • missing teeth
    • extra teeth
    • impacted teeth
    • dental caries
    • periodontal disease
    • tooth abnormalities
    • retained roots
    • cysts and tumors
  17. The primary benefit of radiographs is the detection of ________. And the benefit of ________ detection ________ ______ the risk of small doses of radiation
    • disease
    • disease
    • far outweighs
  18. true or false. Radiographs can also confirm suspected diseases, and assist in locating lesions and foreign objects, also can sho changes secondary to trauma, caries, and periodontal disease
  19. true or false. A very effective way of avoiding the gagging stimuli of a pt is to demonstrate film placement
  20. What can be used if intraoral films are impossible?
    extraoral films
  21. What is a good way to help distract from gagging?
    having them lift an arm or leg
  22. true or false. The best way to communicate with a pt who is blind is to use clear verbal explanations and always keep the pt informed
  23. a substantial impairment of mental or physical functioning that occurs before the age of 22 and is of indefinite duration
    developmental disability
  24. for an edentulous pt, the film should be positioned so that approximately ______ of it extends byond the edentulous ridge