1
OHIO EFDA EXAM TEXT BANK.
LATEST EDITION 2024-2025.
QUESTIONS & CORRECT VERIFIED
ANSWERS. GRADED A
A contra angle matrix retainer may be indicated when restoring which of the
following mandibular molar preps
modl with mesio lingual cusp missing
modl with both lingual cusps missing
mod with a very deep area of root caries on the distal
modb with much of the buccal surface missing - ANSmodb with much of
the buccal surface missing
after completing the carving of the restoration you detect a submarginal
area that is about 0.75mm deep, what should be done about this marginal
deficiency
the amalgam restoration should be removed and replaced
you should remove the adjacent enamal with a bur
add fresh amalgam to the deficiency
nothing this size of submarginal area is appropriate - ANSthe restoration
should be remove and replaced
1
, 2
after curing the composite restoration you find a void/open margin what is
the next step if the tooth has not been contaminated
fill the void with bonding agent
leave the void along and begin you finishing
re etch and place composite
place composite without reetching - ANSplace composite without reetching
after removing the band you discover a wide and tight proximal contact. if
floss cannot pass through the contact, what grade would be given for
contact
r
s
t
v - ANSv
all of the following are recommendations for finishing class V restoration
except:
pear shaped bear
flame
tapered disamong
sandpaper dics - ANSpear shaped bur
an oblique ridge is composed of which anatomical features
2
, 3
two trinagular ridges
triangular ridge and marginal ridge
triangular ridge and triangular fossa
marginal ridge and two triangular ridge - ANStwo triangular rige
as an efda you do not want to contaminate the air inhibited surface of
composite unit the layering process is complete because
the air inhibited layer released fluoride
a mechanical bond is created between the composite layers
a chemical bond is achieved during the layering of composite
it will affect the shade of the composite resin - ANSa chemical bond is
achieved during the layering of composite
choose the option that accurately list the metals in order from largest to
smallest quanity in amalgam alloy powder
silver copper zinc
zinc cipper silver
silver zinc tin
tin sillver cipper - ANSsilver copper zinc
choose the true statement regarding using a bonding agent with composite
the bonding agent is an unfilled resin material
it is placed prior to phosphoric acid etching
provides primarily chemical retention to the enemal
3
, 4
it is not involved in retention only esthetics - ANSthe bonding agent is an
unfilled resin material
composite resin may offer the following advantage for posterior restorations
it has a greater coefficient of thermal expansion than tooth
it is relatively simple to insert and finish
it adapts well in deep subgingival areas
it strengthens remaining tooth structure - ANSit strengthens remaining
tooth structure
delayed expansion occurs from the exposure of amalgam to moisture
which component of amalgam is most moisture sensitive and contributes to
this expansion
tin
silver
copper
zinc - ANSzinc
denting bonding agent are commonly
applied over the entire prep and are self cured
applied to the pulpal or axial walls of the caivty prep andlight cured
applied ln small increments
appliced over the entire prep and light cured - ANSapplied over the entire
prep and light cured
4
OHIO EFDA EXAM TEXT BANK.
LATEST EDITION 2024-2025.
QUESTIONS & CORRECT VERIFIED
ANSWERS. GRADED A
A contra angle matrix retainer may be indicated when restoring which of the
following mandibular molar preps
modl with mesio lingual cusp missing
modl with both lingual cusps missing
mod with a very deep area of root caries on the distal
modb with much of the buccal surface missing - ANSmodb with much of
the buccal surface missing
after completing the carving of the restoration you detect a submarginal
area that is about 0.75mm deep, what should be done about this marginal
deficiency
the amalgam restoration should be removed and replaced
you should remove the adjacent enamal with a bur
add fresh amalgam to the deficiency
nothing this size of submarginal area is appropriate - ANSthe restoration
should be remove and replaced
1
, 2
after curing the composite restoration you find a void/open margin what is
the next step if the tooth has not been contaminated
fill the void with bonding agent
leave the void along and begin you finishing
re etch and place composite
place composite without reetching - ANSplace composite without reetching
after removing the band you discover a wide and tight proximal contact. if
floss cannot pass through the contact, what grade would be given for
contact
r
s
t
v - ANSv
all of the following are recommendations for finishing class V restoration
except:
pear shaped bear
flame
tapered disamong
sandpaper dics - ANSpear shaped bur
an oblique ridge is composed of which anatomical features
2
, 3
two trinagular ridges
triangular ridge and marginal ridge
triangular ridge and triangular fossa
marginal ridge and two triangular ridge - ANStwo triangular rige
as an efda you do not want to contaminate the air inhibited surface of
composite unit the layering process is complete because
the air inhibited layer released fluoride
a mechanical bond is created between the composite layers
a chemical bond is achieved during the layering of composite
it will affect the shade of the composite resin - ANSa chemical bond is
achieved during the layering of composite
choose the option that accurately list the metals in order from largest to
smallest quanity in amalgam alloy powder
silver copper zinc
zinc cipper silver
silver zinc tin
tin sillver cipper - ANSsilver copper zinc
choose the true statement regarding using a bonding agent with composite
the bonding agent is an unfilled resin material
it is placed prior to phosphoric acid etching
provides primarily chemical retention to the enemal
3
, 4
it is not involved in retention only esthetics - ANSthe bonding agent is an
unfilled resin material
composite resin may offer the following advantage for posterior restorations
it has a greater coefficient of thermal expansion than tooth
it is relatively simple to insert and finish
it adapts well in deep subgingival areas
it strengthens remaining tooth structure - ANSit strengthens remaining
tooth structure
delayed expansion occurs from the exposure of amalgam to moisture
which component of amalgam is most moisture sensitive and contributes to
this expansion
tin
silver
copper
zinc - ANSzinc
denting bonding agent are commonly
applied over the entire prep and are self cured
applied to the pulpal or axial walls of the caivty prep andlight cured
applied ln small increments
appliced over the entire prep and light cured - ANSapplied over the entire
prep and light cured
4
