Dental Asst. Test Part II

  1. How would you test the darkroom for white light leaks?
    Use masking tape
  2. What test should be used to evaluate the adequacy of the darkroom safelight?
    Coin test
  3. List three anatomic structures that may require modification of film placement procedures.
    Tongue tied, Tori, High Muscle Attach.
  4. What two intraoral radiographic procedures can be used to localize an object in all three dimensions of space?
    • 1) The anterior & postier location of the object
    • 2) Superior- inferior location of an object
  5. Define "latent period" as it relates to radiation biologic effects.
    the time between exposure to radiation & the time the biological effects become visible
  6. List at least six factors that will influence radiation effects.
    Type, total dose, penetrating ability, acute exposure, while body exposure, ability to repair damage
  7. List seven radiobiologically "critical" organs and the effects that they are known to develop.
    • Skin Cancer
    • Thyroid Gland Cancer
    • Breast Cancer
    • Blood Form Organs-Leukemia
    • Reproductive Gland-Inherited
    • Fetus-Birth Defects
  8. Dental radiographic procedures expose a _____ area of the patient's face.
  9. List 4-5 examples of "somatic" tissues.
    • Muscles
    • Bones
    • Salivary Glands
    • Kidneys
    • Skin
  10. List two types of "radioresistant" tissues.
    • Muscle
    • Nerve
  11. List four types of tissues that are "intermediate" in radiation sensitivity.
    • Blood Vessels
    • Glands
    • Connective Tissues
    • Bone
  12. Define the term radiosensitive and radioresistant.
    Some tissues are very sensitive to radiation.
  13. Give two examples of a stochastic radiation effect.
    • Genetic Mutation
    • Cancer Induction
  14. Give two examples of a nonstochastic/ deterministic effect.
    • Impaired Fertility
    • Epilation
  15. List two examples of genetic/ reproductive tissues .
    • Egg
    • Sperm
  16. Exposure of genetic tissues causes _____.
  17. Define in your own words the maximum permissible dose (MPD) concept of radiation protection.
    Will not produce any effect
  18. What is the MPD for an occupationally exposed person?
    0.5 rem/yr
  19. What is the MPD for a non-occupationally exposed person?
    0.5 rem/yr
  20. What is the MPD for a pregnant occupationally exposed person?
    0.5 rem/yr
  21. What is the ALARA concept of radiation protection. How does it differ from the MPD?
    Does not specify a specific level
  22. A persons' daily exposure to background radiation will be about ____uSv.
  23. The National Council on Radiation Protection limits total lifetime occupational exposure to a formula: 10 mSv  X  workers age in years. This occupational limit is called ______.
    Individual Lifetime Effective Dose
  24. What is background radiation? How much do we receive each year in mSv?
    0.9 mSv
  25. The average somatic dose per "D" speed periapical radiograph is about ___  mSv/film.
  26. Digital imaging requires ____ less radiation than a conventional "D speed" radiograph.
  27. What is the risk of dental radiographs causing skin cancer, cataracts, sterility, thyroid cancer, birth defects?
  28. Leaded thyroid collars will reduce thyroid gland exposures by about ___%.
  29. Leaded aprons will reduce ____ radiation to the reproductive organs (gonads) by about ___%.
    • genetic
    • 98
  30. Leaded thyroid collars and leaded aprons DO NOT reduce the amount of radiation exposing the ___.
  31. X-ray units with _______ timers are recommended because they __________.
    • Electronic
    • produce short exposure
  32. Film holding devices prevent exposure to the patient's _____.
  33. Compare the differences in the image quality of a panoramic radiograph with an intraoral periapical radiograph.
    Significant less detail than a PA
  34. How does the film used in panoramic radiography differ from the one used in intraoral radiography?
    The intraoral has to be motionless
  35. What is a supplementary radiographic technique?
    to provide diagnostic radiographic info
  36. List the two types of occlusal radiographic techniques.
    • Cross Section
    • Toppographs
  37. Name two radiographic localization procedures.
    • Shift Shot Principle
    • Right Angle Principle
  38. A radiographic localization procedure requiring the use of a periapical radiograph AND a cross-section occusal radiograph is called the _____.
    Right angle
  39. A radiographic localization procedure requiring the use of TWO periapical radiographs taken at different angles is called the _______.
    Shift Shot Clark
  40. What occlusal radiographic technique requires that the central ray be directed perpendicular to the bisector of the angle formed by the long axis of the tooth and the film plane?
  41. The radiographic localization technique most commonly used to locate the buccal-lingual position of an object in the mandible is the _____ technique.
    Right Angle
  42. The radiographic localization technique most commonly used to locate the buccal-lingual position in the maxilla is the _____ technique.
  43. What is the primary purpose of an occusal radiograph?
    location of foreign bodies pathology
  44. Why would your dentist ask you to take a radiograph using the "Miller's"/Right-angle technique?
    to locate a buccal-lingual position of impacted teeth
Card Set
Dental Asst. Test Part II
RDA certification