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EFDA exam Questions and Answers 100% Solved
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Exam of 2 pages for the course EFDA at EFDA (EFDA exam)
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EFDA examPolysiloxane - answer Very accurate addition silicone elastomer impression material; it
is used extensively for crown and bridge procedures because of its accuracy,
dimensional stability, and ease of use
Vinyl polysiloxanes (VPS) - answer Most accurate, stable, and pleasant materials to
work with in terms of crowns and bridges
Elastomeric - answer Material having elastic properties from rubber , rubber base
silicone impression material - answer- Odor-free, nonstaining, and relatively easy to
mix.
- The deformation is much less than that of polysulfide; the dimensional stability is
superior.
- Supplied with the base as a paste in a tube and the catalyst as a liquid in a bottle or
smaller tube of paste, with cartridges and putty.
Tofflemire/Matrix Band Retainer - answer To hold and maintain stability of matrix band
during condensation of restorative material for class II preparation
Wooden wedge - answerUsed to hold matrix band in place and helps prevent
overhangs
Alginate - answerIs classified as an irreversible hydrocolloid. Water triggers a chemical
reaction which causes it to set or to gel. Once the gel process begins it is irreversible.
Bite registration - answerAn occlusal record of the relationship between the upper and
lower teeth
Steps after impression taken - answerRinse with water, disinfect, dry
How long to leave disinfectant on impression? - answer15 minutes
How long to pour alginate? - answer1 hour
Amalgam condenser - answerAn instrument used to pack amalgam into the cavity
preparation.
Ball Burnisher - answerSmoothes occlusal surface of restoration , after condensing
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