OHIO EFDA BOARD EXAM Latest Update 2025-
2026 70 Questions and 100% Verified Correct
Answers Guaranteed A+
_____________ is the fourth hardest tissue in the body that covers the anatomical roots
of teeth - CORRECT ANSWER: Cementum
Abfraction - CORRECT ANSWER: loss of tooth surface in the cervical area,(gum line)
due to stress and pressure applied to tooth through biting clenching, chewing and
grinding
Abrasion - CORRECT ANSWER: In the gingival third, enamel worn away by friction
from something other than tooth on tooth contact, aggressive brushing
At the occlusal and incisal surface - CORRECT ANSWER: In which area on the tooth is
the enamel thickest
Attrition - CORRECT ANSWER: Gradual loss of tooth structure or tissue caused by
tooth on tooth contact.
conventional type composite has larger hard filler particles, making it more susceptible
to ___________ - CORRECT ANSWER: Staining
Coronal polishing involves removing____________ type of stains - CORRECT
ANSWER: Suparagingival extrinsic
Creep and corrosion can be prevented in an amalgam if ___________ metals is found
in the alloy in a high amount? - CORRECT ANSWER: Cooper
, dimensional changes of Amalgam - CORRECT ANSWER: Mercury alloy ratio (high
amount of mercury)
Trituration time ( longer mixing=less expansion, more contraction)
Condensation increasing pressure during placement ( less expansion)
Contamination moisture ( increase expansion, especially in alloy that has zinc)
Temperature change( causes amalgam to change shape, allowing fluid to travel back
and forth inin and out between amalgam and tooth= percolation.
Enamel is the second hardest tissue in the body. - CORRECT ANSWER: False
Erosion - CORRECT ANSWER: Chemical loss of materialized tooth structure caused by
exposure to acid, bulimia, phosphoric citric acid, Gerd, meth mouth
Exothermic describes the setting reaction that occurs in what cement when use as a
base? - CORRECT ANSWER: Zinc phosphate
Green stones are used to finish a amalgam by removing __________ - CORRECT
ANSWER: Bulky or excess amalgam
How is the sheet of rubber dam material stabilized after placement of the clamp in the
mouth? - CORRECT ANSWER: Ligating the tooth furthest away from the clamp
How many cusps does a mandibular 1st molar have - CORRECT ANSWER: 5
If acid etchant has been used in, the tooth becomes contaminated with moisture what
should be done? - CORRECT ANSWER: Re-etch for 10-20 seconds.
If present, the cusp of Carabelli is located on, which molar - CORRECT ANSWER: ML
cusp area of the maxillary, first molar
2026 70 Questions and 100% Verified Correct
Answers Guaranteed A+
_____________ is the fourth hardest tissue in the body that covers the anatomical roots
of teeth - CORRECT ANSWER: Cementum
Abfraction - CORRECT ANSWER: loss of tooth surface in the cervical area,(gum line)
due to stress and pressure applied to tooth through biting clenching, chewing and
grinding
Abrasion - CORRECT ANSWER: In the gingival third, enamel worn away by friction
from something other than tooth on tooth contact, aggressive brushing
At the occlusal and incisal surface - CORRECT ANSWER: In which area on the tooth is
the enamel thickest
Attrition - CORRECT ANSWER: Gradual loss of tooth structure or tissue caused by
tooth on tooth contact.
conventional type composite has larger hard filler particles, making it more susceptible
to ___________ - CORRECT ANSWER: Staining
Coronal polishing involves removing____________ type of stains - CORRECT
ANSWER: Suparagingival extrinsic
Creep and corrosion can be prevented in an amalgam if ___________ metals is found
in the alloy in a high amount? - CORRECT ANSWER: Cooper
, dimensional changes of Amalgam - CORRECT ANSWER: Mercury alloy ratio (high
amount of mercury)
Trituration time ( longer mixing=less expansion, more contraction)
Condensation increasing pressure during placement ( less expansion)
Contamination moisture ( increase expansion, especially in alloy that has zinc)
Temperature change( causes amalgam to change shape, allowing fluid to travel back
and forth inin and out between amalgam and tooth= percolation.
Enamel is the second hardest tissue in the body. - CORRECT ANSWER: False
Erosion - CORRECT ANSWER: Chemical loss of materialized tooth structure caused by
exposure to acid, bulimia, phosphoric citric acid, Gerd, meth mouth
Exothermic describes the setting reaction that occurs in what cement when use as a
base? - CORRECT ANSWER: Zinc phosphate
Green stones are used to finish a amalgam by removing __________ - CORRECT
ANSWER: Bulky or excess amalgam
How is the sheet of rubber dam material stabilized after placement of the clamp in the
mouth? - CORRECT ANSWER: Ligating the tooth furthest away from the clamp
How many cusps does a mandibular 1st molar have - CORRECT ANSWER: 5
If acid etchant has been used in, the tooth becomes contaminated with moisture what
should be done? - CORRECT ANSWER: Re-etch for 10-20 seconds.
If present, the cusp of Carabelli is located on, which molar - CORRECT ANSWER: ML
cusp area of the maxillary, first molar
