DENTAL HYGIENE NATIONAL BOARD PRACTICE
QUESTIONS AND DETAILED SOLUTIONS
◉ The bio-hazard waste or regulated true or false?
Answer: True
◉ When should we change our mask?
Answer: When it becomes wet or soiled with every patient. That
includes your fluids as well.
◉ What is the purpose of PPE?
Answer: Is to minimize the exposure to Aerosol, Spatter, Direct
transmission, and Indirect transmission (ASDI)
◉ Do disinfectants kill spores?
Answer: NO
◉ What are some types of disinfectants?
Answer: Chlorine-based compounds, iodophors, phenols,
quaternary compounds
◉ What are some bad qualities of chlorine-based compounds?
,Answer: corrosive to metals and strong odor
◉ What are some bad qualities of phenols?
Answer: may leave a film or residue on surfaces
◉ What are some bad qualities of iodophors?
Answer: can discolor some surfaces yellow
◉ What are some bad qualities of quaternary compounds?
Answer: not corrosive, but have a lower kill spectrum
◉ What would be some good qualities of disinfectants?
Answer: rapid, broad spectrum antimicrobial, bacteriocidal,
fungicidal, tuberculocidal, virucidal, odorless, easy to use, fast acting,
economical, residual effect which it continues to work after it dries,
not toxic to touch or inhalation, EPA registered, and disinfects and
cleans.
◉ Is a spatter invisible to the eye?
Answer: NO, can see it when airborne
◉ Is aerosol invisible to the eye?
Answer: yes, remain in the air for a while
,◉ What sheet provides an employee with information regarding the
hazards of chemicals utilized in the office and how to protect
themself?
Answer: MSDS (Material Safety Data Sheet)
◉ What disinfectant should not be used as a surface disinfectant in
the office and why?
Answer: Glutaraldehydes, toxic effects of fumes; also corrosive
◉ What kind of disinfectants are used in the dental office?
Answer: Intermediate
◉ What are some methods of sterilization?
Answer: Chemical, Dry, and Steam
◉ During chemical sterilization, how long at what degree and
pressure are used?
Answer: 20 min @ 270 degree F @ 20-40 lbs psi
◉ During Dry sterilization, how long at what degree are used?
Answer: 60-120 min @ 320 degree F
, ◉ During Steam sterilization, how long at what degree and pressure
are used?
Answer: 20-30 min @ 250 degree F @ 15-30lb psi
◉ What method of sterilization involves the least temperature?
Answer: Steam at 250 degree F
◉ What are some considerations when using the chemical method?
Answer: ventilation is necessary, may damage rubber and plastic
items
◉ What are some considerations when using the dry method?
Answer: recommended for metal instruments, avoid paper products,
may damage, rubber and plastic items, and not recommended for
handpieces.
◉ What are some considerations when using the steam method?
Answer: corrodes non-stainless steel instruments, dulls instruments
and burs, ok for some plastics; cotton rolls and gauze, paper
packages come out wet and tear.
◉ What is the only way to tell if the instruments are sterilized?
Answer: A weekly spore test
QUESTIONS AND DETAILED SOLUTIONS
◉ The bio-hazard waste or regulated true or false?
Answer: True
◉ When should we change our mask?
Answer: When it becomes wet or soiled with every patient. That
includes your fluids as well.
◉ What is the purpose of PPE?
Answer: Is to minimize the exposure to Aerosol, Spatter, Direct
transmission, and Indirect transmission (ASDI)
◉ Do disinfectants kill spores?
Answer: NO
◉ What are some types of disinfectants?
Answer: Chlorine-based compounds, iodophors, phenols,
quaternary compounds
◉ What are some bad qualities of chlorine-based compounds?
,Answer: corrosive to metals and strong odor
◉ What are some bad qualities of phenols?
Answer: may leave a film or residue on surfaces
◉ What are some bad qualities of iodophors?
Answer: can discolor some surfaces yellow
◉ What are some bad qualities of quaternary compounds?
Answer: not corrosive, but have a lower kill spectrum
◉ What would be some good qualities of disinfectants?
Answer: rapid, broad spectrum antimicrobial, bacteriocidal,
fungicidal, tuberculocidal, virucidal, odorless, easy to use, fast acting,
economical, residual effect which it continues to work after it dries,
not toxic to touch or inhalation, EPA registered, and disinfects and
cleans.
◉ Is a spatter invisible to the eye?
Answer: NO, can see it when airborne
◉ Is aerosol invisible to the eye?
Answer: yes, remain in the air for a while
,◉ What sheet provides an employee with information regarding the
hazards of chemicals utilized in the office and how to protect
themself?
Answer: MSDS (Material Safety Data Sheet)
◉ What disinfectant should not be used as a surface disinfectant in
the office and why?
Answer: Glutaraldehydes, toxic effects of fumes; also corrosive
◉ What kind of disinfectants are used in the dental office?
Answer: Intermediate
◉ What are some methods of sterilization?
Answer: Chemical, Dry, and Steam
◉ During chemical sterilization, how long at what degree and
pressure are used?
Answer: 20 min @ 270 degree F @ 20-40 lbs psi
◉ During Dry sterilization, how long at what degree are used?
Answer: 60-120 min @ 320 degree F
, ◉ During Steam sterilization, how long at what degree and pressure
are used?
Answer: 20-30 min @ 250 degree F @ 15-30lb psi
◉ What method of sterilization involves the least temperature?
Answer: Steam at 250 degree F
◉ What are some considerations when using the chemical method?
Answer: ventilation is necessary, may damage rubber and plastic
items
◉ What are some considerations when using the dry method?
Answer: recommended for metal instruments, avoid paper products,
may damage, rubber and plastic items, and not recommended for
handpieces.
◉ What are some considerations when using the steam method?
Answer: corrodes non-stainless steel instruments, dulls instruments
and burs, ok for some plastics; cotton rolls and gauze, paper
packages come out wet and tear.
◉ What is the only way to tell if the instruments are sterilized?
Answer: A weekly spore test
