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PA EFDA Exam Prep | Questions with 100% Correct Answers |Verified Latest Update
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PA EFDA Exam Prep | Questions with 100% Correct Answers |Verified Latest Update
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PA EFDA Exam Prep | Questions with 100%Correct Answers |Verified Latest Update
Creep - ✔✔Black look around amalgam caused by microleakage can cause an amalgam
restoration to extend out of the cavity preparation can cause marginal breakdown
Electrical - ✔✔Currents in the mouth also referred to as galvanic shock
Galvanic shock - ✔✔Occurs when dissimilar metals in the mouth such as silver amalgam
restoration is against gold restorations acted like a battery and apon contact conduct an
electrical current resulting in pain this occurs especially when the amalgam is newly placed
Corrosive - ✔✔The gradual distraction of material usually metal by chemical reaction with its
environment
Lathe cut alloy (conventional) - ✔✔The cutting rate is precisely controlled to maintain the
desired average particle size and size distribution.
Spherical alloy particles - ✔✔They are around and require less mercury then lathe cut alloys
because this powders particles have a smaller surface area per volume then do the lathe cut
alloy particles
Mercury - ✔✔It is used in the mixing process to form the amalgam restoration
Mercury - ✔✔It is a metal in liquid form used to wet dry alloy particles upon condensing this
rich layer rises to the surface and is carved off or aspirated from the restoration by the assistant
Mercury - ✔✔Approximately only 3% is left in the amalgam restoration of this
,Mercury ratio to alloy - ✔✔Higher the percentage of this in the amalgam of the easier to mix
and the slower to set yet it weakens the amalgam and makes polishing more difficult
Most mercury to alloy ratios are less than what percentage - ✔✔54% because minimum
mercury produces a stronger alloy
Mercury - ✔✔Setting time is quicker 2.5 minutes
Corrosion - ✔✔Slow deterioration by being eaten or worn away
Tarnish - ✔✔To become do the luster of; discolor
Occlusion - ✔✔The static relationship between the incising or mastication surfaces of
maxillary or mandibular teeth or tooth analogues
ICP - ✔✔Intercuspal position/ the way the teeth fit together
MIP - ✔✔Maximum intercuspation/reffered to Centric contact position same as ICP
Define ICP and MIP - ✔✔The complete intercuspation of the opposing teeth independent of
condylar position; A position that is determined by the way the teeth fit together
Centric relation position - ✔✔A bone to bone relationship repeatable position of the
Johansson it is used by restorative dentist to full mouth reconstruction's and fabrication of
dentures
Eccentric contacts - ✔✔Tooth to tooth contact that occur when the jaw moves out of the
centric relation position to the right to the left or forward
, Protrusive movement - ✔✔A straight forward movement of the Jaw
What is the primary function of the posterior teeth - ✔✔To masticate or crush food before
swallowing and to support the occlusion
What is the primary function of the anterior teeth - ✔✔To incise/cut or tear food and to
protect the posterior teeth by preparing them won the John moves into any of the eccentric
position
Lateral excursions - ✔✔Movement of the jaw to the right or left
Temporary restorations - ✔✔Typically should be out of the occlusion to allow the tooth to
become asymptomatic and to make it last longer because it is not strong enough to withstand
normal wear for long periods
Teeth that contact prematurely may produce the following problems - ✔✔-Excessive tooth
wear
-Tooth pain or sensitivity
-Fracture of the opposing tooth or restoration
- movement/shifting of a tooth or teeth due to orthodontic pressures of the prematurity
- widening of the periodontal ligament resulting in a loosening of the tooth
-Interferences in the harmonious movement of the TMJ and muscles of mastication
In general it should not or should be the goal of the operator to remove all marks from the new
restoration? - ✔✔Should not
Class 1 occlusion - ✔✔The normal biting relationship between the maxillary and mandibular
teeth also known as neutro-occlusion
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