DH theory

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Author:
sthomp88
ID:
35955
Filename:
DH theory
Updated:
2010-12-14 15:41:57
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Chapter two
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Intro
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  1. what are the objectives of preventing transmissible disease?
    • protect patients and dental personnel
    • maintain healthy facilities
    • keep organized systems
    • prevent cross contamination
  2. what contacts do standard precautions apply to?
    • blood
    • body fluids (except sweat)
    • nonintact skin
    • mucous membrane
  3. what are 3 other precautions that must be taken in applying standard precautions?
    • trasmission based (flu, tb, varicella_
    • airborne transmission
    • transmission through skin contact
  4. in the utero, the oral cavity is__________.
    sterile
  5. how are microorganisms transferred from the mother to the babies oral cavity?
    breast feeding
  6. true or false. as an infant grows, there is continuing introduction of microorganisms normal for an adult oral cavity.
    true
  7. where does the salivary bacteria come from?
    • dorsum of tongue
    • mucous membranes
    • gingival/periodontal tissues
  8. name 3 areas of the oral cavity that high counts of microorganisms are found
    • dental biofilm
    • periodontal pockets
    • carious lesions
  9. true or false. the intact mucous membrane of the oral cavity protects against infections to a degree.
    true
  10. name the 6 essential links for spreading infections
    • infectious agent
    • reservoir
    • port of exit
    • mode of transportation
    • port of entry
    • susceptible host
  11. infectious agent
    • invading organism
    • bacteria
    • fungi
    • viruses
    • protozoa
    • rickettsiae
  12. reservoirs
    • where the invading organism lives and multiplies
    • people
    • equipment
    • instruments
    • water (from tubing)
  13. port of exit
    • mode of escape from the reservoir
    • secretions
    • saliva, blood
    • skin and mucous membrane
    • droplets
  14. transmission
    • direct contact
    • indirect contact
    • fomite, vector
    • airborne
  15. port of entry
    • mode of entry of the infectious agent into the new host
    • mucous membrane
    • GI tract
    • respiratory tract
    • broken skin
    • eyes
  16. susceptible host
    • does not have immunity to invading infection
    • immunosupressed
    • medically comprimised
    • elderly
  17. Name 7 factors that influence the development of infection
    • presence of infectious agent
    • number of organisms
    • duration of exposure
    • virulance of organism
    • immune status of the host
    • general physical health of the host
    • nutritional status of the host
  18. name 4 factors that would alter the bodies normal defenses against infection
    • abnormal physical conditions, such as a defective heart valve
    • systematic diseases
    • diabetes
    • mellitus
    • alcoholism
    • leukemia
    • glomerulonephritis
    • AIDS
    • drug therapy
    • prostheses and transplants
  19. How can dust borne organisms/airborne particles infect someone?
    • the opening and closing of doors sends airborne particles flying
    • large airborne particles
    • can contaminate dental instruments
    • controlled with surface disinfection
  20. what size are true aerosol particles?
    less than 50 micrometers, but most are less than 5
  21. describe 3 characteristics of aerosols
    • can be solid or liquid
    • can be invisible or visible
    • can be suspended in the air for long periods of time
  22. define spatter
    • greater than 50 micrometers in size
    • heavier particles for short durations of time
    • occurs on objects, floors, and people
    • it is visible, especially after it lands
  23. How are aerosols and spatter created?
    • during breathing, speaking, coughing, and sneezing
    • during intraoral procedures
    • from handpieces, ultrasonic
  24. true or false, aerosols travel with air currents?
    true
  25. what does prevention of transmission depend on?
    • elimination or limitation of organisms
    • interruption of transmission (disinfection-break the chain)
    • protecion of susceptible host (PPE)
  26. what are 2 pre procedural methods for prevention of transmission?
    • biofilm removal-polish first
    • antiseptic mouth rinse
  27. name 5 ways to interrupt transmition
    • use rubber dam
    • use HVE
    • manual instrumentation (no ultrasonic)
    • adequate ventilation
    • housekeeping
  28. state the protocal for keeping the water clean
    • follow EPA standards for drinking water
    • run water through water lines
    • 2 min at the start and end of day
    • 30 seconds between pt.s
  29. what is used during intraoral procedures to prevent transmission to the hygienist? And the pt?
    • PPE, masks, sheilds, eyewear
    • protective eyewear

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