Non-delegable tasks and/or procedures include all except:
1. final removal of any fixed appliance
2. final impression for a single crown unit
3. cutting procedures used in tooth preparation
4. placement of direct-bonded restorative materials - answer4. placement of direct-
bonded restorative materials
With training, all of the following individuals may take the EFDA board exam to become
EFDAs in Ohio except:
1. RDHs
2. dental students with permission from their dean
3. dental assistants that are not certified
4. unlicensed dentists - answer3. dental assistants that are not certified
Which metal within amalgam is most moisture sensitive, which can result in delayed
expansion?
1. silver
2. tin
3. copper
4. zinc - answer4. zinc
What is the term for the convex structure that is formed when 2 triangular ridges meet?
1. transverse ridge
2. central groove
3. proximal contact
4. fossa - answer1. transverse ridge
Which component of amalgam helps to reduce creep + corrosion?
1. copper
2. silver
3. tin
4. mercury - answer1. copper
What is the term for the mercury-rich layer of amalgam that rises to the surface during
condensing?
1. plash
2. flash
3. admixed
4. under-triturated - answer1. plash
, Which 2 metals combine in the gamma-II phase causing corrosion?
1. mercury + silver
2. mercury + tin
3. copper + silver
4. tin + copper - answer2. mercury + tin
Triturated amalgam is retained in a preparation by which of the following means?
1. polymerization + chemical retention
2. condensing + chemical retention
3. polymerization + mechanical retention
4. condensing + mechanical retention - answer4. condensing + mechanical retention
Which wall/floor is not present in an occlusal preparation?
1. pulpal
2. mesial
3. lingual
4. occlusal - answer4. occlusal
Which anatomical structure is not present on a mandibular first premolar?
1. mesial pit + fossa
2. transverse ridge
3. central pit + fossa
4. central groove - answer3. central pit + fossa
If an explorer tip catches when moving from tooth toward amalgam + from amalgam
toward tooth, what term can be used to describe this margin?
1. open
2. undercontoured
3. overextended
4. submarginal - answer1. open
What are the 2 line angles that define the location of the retentive grooves found in
class V amalgam preparations on a molar?
1. axiodistal + axiomesial
2. gingivo-axial + occluso-axial
3. mesiogingival + distogingival
4. mesio-occlusal + disto-occlusal - answer2. gingivo-axial + occluso-axial
Describe the contour (anatomy) of a class V amalgam restoration?
1. flat occlusogingivally + convex mesiodistally
2. concave occlusogingivally + convex mesiodistaly
3. convex mesiodistally + convex occlusogingivally
4. concave mesiodistally + convex occlusogingivally
5. flat mesiodistally + convex occlusogingivally - answer3. convex mesiodistally +
convex occlusogingivally
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