NBDHE: Clinical Dental Hygiene Exam | Actual Questions and
Answers Latest Updated 2026/2027 (Graded A+)
•
regulated biohazard waste
i. - ✔✔- must be disposed of properly
ii. - ex: sharps, items that drip of saturated blood or saliva, hard or soft tissues removed from
the pt's mouth
•
PPE mask
i. - ✔✔- change when it becomes wet/moist
ii. - change with every pt
•
purpose of PPE
- ✔✔provides barriers to minimize exposure to aerosols, spatter, direct transmission,
indirect transmission
•
Safety Data Sheets (SDS)
- ✔✔provide the employee with information regarding the hazards of chemicals utilized in
office and how to protect themselves from these hazards
•
aerosol
i. - ✔✔- invisible airborne particles
ii. - remain in the air for a while
•
indirect transmission
- ✔✔occurs through a contaminated object
•
spatter
- ✔✔visible airborne particles of blood and saliva; drop quickly to the floor, countertops, etc.
•
fomite
- ✔✔object/material likely to carry infection
•
disinfectant
- ✔✔kill or inactivate most pathogenic microbes, not spores
, •
disinfectant properties
- ✔✔bactericidal, fungicidal, tuberculocidal, virucidal, environmentally safe, residual effect,
EPA registered, cleans and disinfects
•
residual affect
i. - ✔✔- continues to work after it is dried
ii. - substantivity
•
chlorine-based compounds
i. - ✔✔- type of disinfectant
ii. - corrosive to metals
iii. - strong odor
•
iodophors
i. - ✔✔- type of disinfectant
ii. - can discolor some surfaces yellow
•
phenols
- ✔✔type of disinfectant, may leave a film or residue on surfaces
•
quaternary compounds
i. - ✔✔- type of disinfectant
ii. - not corrosive, but lower kill spectrum
iii. - limited efficacy
•
levels of surface disinfectants
i. - ✔✔- high: used in surgical areas
ii. - intermediate: used in dental offices; must kill TB organism
iii. - low: generally used in home, not acceptable for dental setting; simple phenols
•
methods of sterilization: chemical sterilization
i. - ✔✔- method of recommended sterilization
ii. - min temp: 273*F for 20 mins w/ pressure of kPa/25psi
iii. - ventilation necessary
iv. - may damage rubber & plastic
v. - *Spore test* = Geobacillus stearothermophilus
Answers Latest Updated 2026/2027 (Graded A+)
•
regulated biohazard waste
i. - ✔✔- must be disposed of properly
ii. - ex: sharps, items that drip of saturated blood or saliva, hard or soft tissues removed from
the pt's mouth
•
PPE mask
i. - ✔✔- change when it becomes wet/moist
ii. - change with every pt
•
purpose of PPE
- ✔✔provides barriers to minimize exposure to aerosols, spatter, direct transmission,
indirect transmission
•
Safety Data Sheets (SDS)
- ✔✔provide the employee with information regarding the hazards of chemicals utilized in
office and how to protect themselves from these hazards
•
aerosol
i. - ✔✔- invisible airborne particles
ii. - remain in the air for a while
•
indirect transmission
- ✔✔occurs through a contaminated object
•
spatter
- ✔✔visible airborne particles of blood and saliva; drop quickly to the floor, countertops, etc.
•
fomite
- ✔✔object/material likely to carry infection
•
disinfectant
- ✔✔kill or inactivate most pathogenic microbes, not spores
, •
disinfectant properties
- ✔✔bactericidal, fungicidal, tuberculocidal, virucidal, environmentally safe, residual effect,
EPA registered, cleans and disinfects
•
residual affect
i. - ✔✔- continues to work after it is dried
ii. - substantivity
•
chlorine-based compounds
i. - ✔✔- type of disinfectant
ii. - corrosive to metals
iii. - strong odor
•
iodophors
i. - ✔✔- type of disinfectant
ii. - can discolor some surfaces yellow
•
phenols
- ✔✔type of disinfectant, may leave a film or residue on surfaces
•
quaternary compounds
i. - ✔✔- type of disinfectant
ii. - not corrosive, but lower kill spectrum
iii. - limited efficacy
•
levels of surface disinfectants
i. - ✔✔- high: used in surgical areas
ii. - intermediate: used in dental offices; must kill TB organism
iii. - low: generally used in home, not acceptable for dental setting; simple phenols
•
methods of sterilization: chemical sterilization
i. - ✔✔- method of recommended sterilization
ii. - min temp: 273*F for 20 mins w/ pressure of kPa/25psi
iii. - ventilation necessary
iv. - may damage rubber & plastic
v. - *Spore test* = Geobacillus stearothermophilus
