NBDHE dental hygiene board exam Questions and Answers
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Course
NBDHE
Institution
NBDHE
Sticky wax is used for...
Ans- attach models
calcium hydroxide
Ans- liner, stimulates formation reparative dentin
ZOE (eugenol)
Ans- is a liner that release fluoride and seal tubules
zinc phosphate
Ans- is cement
hybrid fill
Ans- include both microfills and midifills , larger than nanofill...
Ans- is a liner that release fluoride and seal tubules
zinc phosphate
,Ans- is cement
hybrid fill
Ans- include both microfills and midifills , larger than nanofill
what would you polish gold with extraorally?
Ans- rough
what would best is used to polish gold intraorally?
Ans- tin oxide
what is the biggest weakness of a gold cast restoration ?
Ans- solubility of the cement needed
best impression material is suited for an onlay?
Ans- reversible hydrocolloid
,how amalgams set
Ans- crystallization
a process of how alginate impression set
Ans- gelation
a process of how monomer sets
Ans- polymerization
what to use to clean an instrument used with ZOE?
Ans- orange solvent
what additives will modify the gypsum product?
Ans- borax will slow the setting time= increase the time
warm water and potassium sulfate will accelerate the setting time = reduce the
time
, modify mean it affects it, either increase or decrease
what material needed to mix on a glass slab?
Ans- zinc phosphate cement due to its exothermic reaction
what is the life expectancy of a composite restoration?
Ans- 10 years
main reason fo composite bonding failure
Ans- saliva contamination
imbition
Ans- absorption of water causing swelling impression material
when measuring oral disease which characteristic is not ideal?
Ans- time-consuming. indices should save time and be quick.
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