Dental Hygiene National Board Dental
Materials
Can a affected person use an electric toothbrush on an implant without unfavourable it? -
ANS-YES they can
gold may be polished intraorally with what? - ANS-tin oxide
how can we adjust the working time of a model with each of the exceptional gypsums? - ANS-1)
add potassium sulfate to accelerate set 2)blend with warm (no longer warm) water to boost up
set and 3)upload borax to slow set
If air is integrated into the combination what will take place? - ANS-will bring about floor voids or
innies
Is mild cured composites much less porous than self treatments? - ANS-Yes
Is mild remedies composites unmixed or blended? - ANS-unmixed
Is self cured composites unmixed or combined? - ANS-combined
True or False Occlusal put on can be because of opposing porcelain restorations? - ANS-True
What are is a liners motive? - ANS-Generally used to seal dentin or medicate the dental pulp
(seal and medicate)
What are a few bad traits of a base metallic? - ANS-situation to tarnish and corrode, can be
allergenic and purpose gingival inflammation
What are a few base metals used in dentistry? - ANS-silver, copper, nickel, tin, and zinc
What are some characteristics of a reversible (agar) hydrocolloid? - ANS-undergoes a bodily
response most effective, solid to gel kingdom is temperature based, solidifies whilst bloodless,
famous for a couple of arrangements, and susceptible to imbibition and syneresis
What are some traits of irreversible (alginate) hydrocolloid? - ANS-undergoes a chemical
response, now not temperature based, however putting may be behind schedule by means of
cold, famous choice for study models, prone to imbibition and syneresis, and aerate (fluff) to
save you settling/compaction of powder
What are some contra-indacations for implant placement? - ANS-insufficient bone, uncontrolled
periodontal disorder, smoking, and contamination
What are some ideal features of Amalgam? - ANS-Durable, similar compressive electricity to
enamel, and relatively less expensive
What are some different liners? - ANS-varnish, calcium hydroxide, zinc-oxide eugenol, and
resin-changed glass ionomer
What are a few maximum common filler debris? - ANS-silicates, quartz, or glass
What are some noble metals utilized in dentistry? - ANS-gold, platinum, and palladium
What are a few shapes for an implant? - ANS-cylindrical or have a blade shape
What are a few types of cements? - ANS-zinc-phospate cement, polycarboxylate cement, and
glass ionomer cement, resin cement, hybrid cements, and zinc oxide eugenol cement
, What are a few kinds of dental resins (bonding marketers)? - ANS-BIS-GMA (bisphenol
a-glycidyl methacrylate) and urethane dimethacrylate
What are a few kinds of non-aqueous fabric? - ANS-polysulfide rubber, polyether rubber,
silicone rubber, and vinylpolysiloxane
What are some undesirable features of Amalgam? - ANS-Unattractive, high thermal
conductivity, dimensionally volatile (creep), delayed growth if contaminated by using saliva, and
requires tooth guide
What are the 2 sorts of hydrocolloids? - ANS-reversible (agar) and irreversible (alginate)
hydrocolloid
What are the two forms of impression materials? - ANS-1) Rigid (inelastic) 2) Flexible
(elastomeric)
What are the 6 types of waxes? - ANS-inlay and casting wax, baseplate wax, chunk registration
wax, boxing wax, sticky wax, and utility wax
What are the characteristics of Type 2 (plaster) gypsum? - ANS-irregular, porous particles,
undergoes excessive setting expansion has low compressive strength (calls for masses of water
to reconstitute)
What are the characteristics of Type three (stone) gypsum? - ANS-less abnormal, less porous
particles, undergoes low putting growth, has better compressive electricity (requires much less
water to reconstitute)
What are the stairs we use for a bonding agent? - ANS-15-20 sec. Etch, rinse, dry, practice,
air-thin, polymerize (fiber optic mild)
What are the three varieties of gypsum? - ANS-Type 2: Plaster (beta-calcium sulfate
hemi-hydrate, Type3: Stone (alpha-calcium sulfate hemi-hydrate, and Type four: Diestone
(alpha-calcium sulfate hemi-hydrate)
What are the two classifications of a casting alloy? - ANS-treasured alloy which comprise noble
metals and non-precious alloys comprise base metals
What can wax be changed by means of? - ANS-beeswax, carnauba, rosin, and colorants
What cement is usually used temporarily? - ANS-zinc-oxide/eugenol cement
What usually causes bonding screw ups? - ANS-contamination with saliva or oil
What dental cloth is an alloy of mercury? - ANS-Amalgam
What does Calcium hydroxide stimulate and while is it fine to use it? - ANS-stimulates reparative
dentin; when you touch the base of the pulp
What does carbamide peroxide smash down into? - ANS-hydrogen peroxide and urea
What does truism imply? - ANS-If you change a fabric's components, you convert its properties
What filler increase surface area, and consequently, the bond energy, and increase polish
ability? - ANS-Nanofills
What filler is popular due to excessive polish ability and ease of coping with, however calls for
teeth guide? - ANS-Microfill
What gypsum is higher to use alpha or beta? - ANS-alpha
what is a hundred% gold considered in karat? - ANS-24 karat
What is 75% gold taken into consideration in karat? - ANS-18 karat
What is a barrier used to defend the occlusal surface of tooth from bacterial assault with the aid
of sealing anatomically unprotected tooth shape with resin? - ANS-Pit and Fissure Sealants
