TCDHA Dental Materials Test 3
Self-curing is a process whereby a chemical reaction occurs when 2 resins, a base with chemical
activators and a catalyst, are mixed together? - ✔✔True
Moisture contamination contributes
...
TCDHA Dental Materials Test 3
Self-curing is a process whereby a chemical reaction occurs when 2 resins, a base with chemical
activators and a catalyst, are mixed together? - ✔✔True
Moisture contamination contributes to ineffective bonding? - ✔✔True
Enamel bonding is stronger than dentin bonding? - ✔✔True
Composite resins light cured in large increments can contribute to hypersensitivity? - ✔✔True
The primer is applied following the bonding resin? - ✔✔False, it happens before
The smear layer is composed of cut tooth debris, bacterial plaque, and bodily which interferes
with the formation of bond to the pulp? - ✔✔False
What is the name of the acid commonly used to etch tooth structure? - ✔✔phosphoric acid
How is bonding to enamel achieved? - ✔✔requires only a low viscosity liquid resin monomer
that will penetrate into the spaces on and between enamel rods created by acid etching
What causes dentin sensitivity? - ✔✔over etched dentin
How is dentin bonding best achieved? - ✔✔Adhesion occurs by removal of smear layer and
formation of micro tags within intertubular dentin
glazing phase? - ✔✔(baking) 2nd step, completed after final contouring of crown.
sintering phase? - ✔✔(contouring) 1st step, heat ceramic particles to melting poing then fuse to
adjacent particles at boarders.
As a dental hygienist how would you describe a veneer to your client? - ✔✔Thin layers of
esthetic materials that are bonded to the anterior portion of the mouth.
Ceramics appear similar to natural teeth because they are fluorescent? - ✔✔False
Ceramics appear opalescent, that is, they emit light in the visible wave spectrum when ultraviolet
light hits them? - ✔✔False
The more aesthetic the ceramic is, the more polycrystalline particles are found in it? - ✔✔False,
its glass particles
Computer-Assisted Machining does not require dies or temporary crowns allowing the dentist to
prepare and deliver the restoration in the same process? - ✔✔True
Ultrasonic scalers can chip and craze margins of esthetic materials - ✔✔True
Acidulated fluorophosphate (APF) can be used on porcelain surfaces - ✔✔False
Ceramic materials with a more opaque core such as Procera Zirconia can be used to hide
discolorations from root canal therapy or tetracycline stains? - ✔✔True
A pastel yellow has more chroma than a bold yellow? - ✔✔False
For best shade matching, the teeth should be clean, free of stain, and dry? - ✔✔False (has to be
wet)
A pastel-blue is considered a good colour to look at to refresh the retina while shade taking? -
✔✔True
Shade taking can be done by the lab technician
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