composite?
1. it is an optional step for dental adhesion
2. improves mechanical retention by eliminating or modifying the smear layer
3. lowers the bond strength
4. creates a chemical bone
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2. improves mechanical retention by eliminating or modifying the smear
layer
The result of moisture contamination when condensing with zinc-containing amalgam
is:
1. increased chance of galvanism
2. a drier mix
,3. increased compressive strength
4. excessive delayed expansion
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4. excessive delayed expansion
When is a contra-angle retainer recommended?
1. one or more of the lingual cusps are missing
2. one or more of the buccal cusps are missing
3. when the proximal depth is wider than the width of a universal matrix band
4. for all large class II amalgams
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2. one or more of the buccal cusps are missing
Which of the teeth in the mouth is the largest with 5 functional cusps?
1. mandibular second molar
2. maxillary first molar
3. mandibular first molar
4. all mandibular molars
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3. mandibular first molar
The following statements all apply to direct supervision except:
1. dentist is physically present during the performance of delegated "acts"
, 2. dentist checks the pt before pt leaves the office
3. dentist is personally operating on a pt
4. delegated procedures are performed pursuant to dentist's order and under his/her
license
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3. dentist is personally operating on a pt
When would an open sandwich technique with GI be recommended?
1. whenever a metal matrix band is used
2. whenever the gingival margin of the proximal box is deeper than ideal
3. it is recommended with every class II composite restoration
4. when the proximal box is wider buccolingually than ideal
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2. whenever the gingival margin of the proximal box is deeper than ideal
Which statement is true regarding the use of a bevel in the modified cavity
preparation for a composite resin filling?
1. it provides less surface area requiring etching
2. it removes the outer enamel layer
3. it exposes fewer enamel rods which can be etched
4. may tend to weaken remaining tooth structure
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2. it removes the outer enamel layer