EFDA review practice exam Latest Update 2025- 2026 50 Questions and 100% Verified Correct Answers Guaranteed A+
An overextension (flash) @ the cavosurface margin is indicated by:
- a space btwn the restoration + the enamel wall
- a catch as the explorer moves from moves from tooth to amalgam
- a catch as the explorer moves from amalgam to tooth
- a catch as the explorer is moved in both directions - CORRECT ANSWER: 2. a catch
as the explorer moves from moves from tooth to amalgam
An undercontoured class V restoration:
- will displace the gingival from its normal position
- is caused by not removing enough of the restorative material
- will increase plaque accumulation + recurrent decay
4. is acceptable - CORRECT ANSWER: 3. will increase plaque accumulation +
recurrent decay
Basic remediable intraoral tasks and/or procedures include all of the following except:
- impressions for diagnostic models or mouthguard
- suture removal
- placement of gingival retraction cord prior to direction impression
4. placement of surgical dressings - CORRECT ANSWER: 3. placement of gingival
retraction cord prior to direction impression
Cavity preparations with rotary instruments generate cutting debris, some of which is compacted in a layer onto the dentinal surface. That layer of material is known as:
- wet dentin
- smear layer 1 / 2
- peritubular dentin
4. collagen fibril network - CORRECT ANSWER: 2. smear layer
Dentin is normally yellowish-white and darker than enamel. The composition of dentin is
approximately:
- 90% inorganic material, 2.0% organic material, 8% water
- 95.5% inorganic material, 0.5% organic material, 4% water
- 70% inorganic material, 20% organic material, 10% water
- 85% inorganic material, 1.0% organic material, 10% water - CORRECT ANSWER: 3.
70% inorganic material, 20% organic material, 10% water
How will adequate condensation pressure strengthen the final restoration?
- by eliminating voids + reducing excess mercury
- by reducing excess mercury only
- by decreasing the contraction
4. by increasing expansion - CORRECT ANSWER: 1. by eliminating voids + reducing
excess mercury
If the depth of a tooth preparation for amalgam extends just into dentin (just beyond the DEJ), what should be placed just prior to the amalgam?
- copal varnish only
- copal varnish followed by zinc phosphate
- calcium hydroxide followed by copal varnish
4. copal varnish followed by GI - CORRECT ANSWER: 1. copal varnish only
If you are assisting a right-handed operator, where do you sit?
- btwn 8-12 o'clock position
- btwn 8-10 o'clock position
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