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RCC 1001 - Final Exam Latest Update
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RCC 1001 - Final Exam LatestUpdate
abfraction lesions are at the CEJ and flexure of the crown causes separation of ________
- Answer enamel rods
what are disadvantages of a direct restoration? - Answer compromised mechanical
properties in large prep
who classified caries based on location - Answer GV Black (also father of operative
dentistry)
which prep is more conservative? modified or conventional - Answer modified! (for
composite. conventional for amalgam)
when do you connect two close deficits - Answer when they are less than .5 mm away
from one another
what is sclerotic dentin - Answer dead zones with no tubules that does not require
treatment
dentin can remineralize if it is affected (not infected). What type of dentin causes
remineralization - Answer tertiary (reparative) dentin
what is pulpal carries removal determined by? - Answer judged by hardness NOT dye
how much dentin should be over the pulp? what do you do if there isn't enough dentin
over pulp? - Answer minimum of .5mm (if not then Calcium Hydroxide or MTA should be
placed to stimulate reparative dentin)
why do we use a high copper amalgam? - Answer reacts with tin and reduces the
formation of more corrosive phase (gamma 2)
what size particles shrink more in composites? - Answer smaller
Amalgamation - Answer the type of alloying. Process of putting metals together
dental amalgam alloys. - Answer Before these metals are combined with mercury to
make dental amalgam
trituration - Answer Amalgam is made by mixing mercury with a powder of amalgam
alloy
what is the composition of amalgam - Answer 50% amalgam mercury, other 50% alloy.
, what is the composition of alloy - Answer 3:1 of alloy is Ag:Sn (silver:tin).
why do we want high copper in amalgam - Answer High copper alloys (12-13%) allow for
strength with correct amount corrosion.
why is there zinc in amalgam - Answer Zinc allows for high polishing/burnishing, which
is why it is used in many alloys.
what is the compressive strength of amalgam - Answer between the compressive
strength of enamel and dentin.
what was not a suitable replacement for mercury - Answer Gallium
when do you use dentin desensitizer - Answer placed in prep before amalgam
condensation (it closes tubules) - also able to use it before composite
whats in a dentin tubule - Answer odontoblasts
GS-80 amalgam - Answer irregular shaped particles combined with spherical shaped
particles.
(allows heavier condensation pressure)
when you condense amalgam what size condenser do you start with? - Answer small to
large
why do we use a moist cotton roll when condensing amalgam - Answer proper marginal
adaptation (wipe it towards the margins)
what needs to be performed prior to splinting to make sure the patient is a good
candidate for a splint? - Answer periodontal examination
simplest method to connect teeth to each other - Answer classic direct bonding method
what does pumice remove - Answer materia alba
how wide should you make the interdental space for a splint? - Answer 0.5mm
Direct composite has to be of a certain thickness for splinting. what is it? - Answer at
least 1 mm
how much time do you have to reimplant teeth after avulsion? - Answer 20 minutes
what splint do you want to use after trauma? how long should it stay on? why? - Answer
TTS - temorary traumatic splint (limited wear to 2 weeks to prevent ankylosis)
what material are anterior matrix systems - Answer plastic. celluloid and mylar
4 goals of matrix band - Answer 1. Create a tight interproximal contact while recreating
the natural tooth shape.
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