OHIO EFDA BOARD PREPARATION EXAM QUESTION AND
04/24/2026
ANSWER
Ohio efda board preparation exam question and
answer latest 2026
For maxillary teeth what position should the patient be in
Supine
What is the most common grasp
The pen grasp and the modified pen grasp
How to stabilize the rubber dam
Ligating the tooth farthest from the clamped tooth
What are bases and liners used for
Bases and liners are used to protect the pulp or to aid in its recovery, or both.
What is pulpitis?
Inflammation of the pulp
A minimal depth restoration
Extends about 0.5mm- 1.5mm into dentin
4/24/2026
1
, OHIO EFDA BOARD PREPARATION EXAM QUESTION AND
04/24/2026
ANSWER
Moderate depth
1mm into dentin, but more than 0.5mm from the pulp
Near pulpal exposure
Less than 0.5mm away from the pulp
What is the criteria for a cavity varnish
Used to protect the pulp from being adversely affected by materials
Normal bond strength for glass ionomer is greater than of zinc phosphate
True
Silver
41% - 71% combines easily with mercury
Copper
Lower copper; less than 9% high copper; 12-30%. Decrease expansion ( creep) less marginal
breakdown
Tin
4/24/2026
15-30% aids in combining the mercury with the alloy
2
, OHIO EFDA BOARD PREPARATION EXAM QUESTION AND
04/24/2026
ANSWER
Zinc
0-1% prevents oxidation during the manufacturing process reduces brittleness
Combination of tin and mercury result in
Gamma 2 phase, which leads to increase in flow and corrosion and a decrease in strength that
predisposes the restoration to fracture
What is creep
Creep is the slow change inn dimensions of the amaglam due to prolonged exposure to stress
What happens when amalgam get contaminated with moisture
Bubbles of hydrogen from the water cause excessive delayed expansion
The compressive strength of amalgam 20 mins after placement
6%
What is the vice
Is a box shaped at the lower end of the retainer that has an opening for threaded spindle to move in
and out of.
4/24/2026
What functions as a receptacle for the side and ends of the matrix
Guide slot in the vice
3
04/24/2026
ANSWER
Ohio efda board preparation exam question and
answer latest 2026
For maxillary teeth what position should the patient be in
Supine
What is the most common grasp
The pen grasp and the modified pen grasp
How to stabilize the rubber dam
Ligating the tooth farthest from the clamped tooth
What are bases and liners used for
Bases and liners are used to protect the pulp or to aid in its recovery, or both.
What is pulpitis?
Inflammation of the pulp
A minimal depth restoration
Extends about 0.5mm- 1.5mm into dentin
4/24/2026
1
, OHIO EFDA BOARD PREPARATION EXAM QUESTION AND
04/24/2026
ANSWER
Moderate depth
1mm into dentin, but more than 0.5mm from the pulp
Near pulpal exposure
Less than 0.5mm away from the pulp
What is the criteria for a cavity varnish
Used to protect the pulp from being adversely affected by materials
Normal bond strength for glass ionomer is greater than of zinc phosphate
True
Silver
41% - 71% combines easily with mercury
Copper
Lower copper; less than 9% high copper; 12-30%. Decrease expansion ( creep) less marginal
breakdown
Tin
4/24/2026
15-30% aids in combining the mercury with the alloy
2
, OHIO EFDA BOARD PREPARATION EXAM QUESTION AND
04/24/2026
ANSWER
Zinc
0-1% prevents oxidation during the manufacturing process reduces brittleness
Combination of tin and mercury result in
Gamma 2 phase, which leads to increase in flow and corrosion and a decrease in strength that
predisposes the restoration to fracture
What is creep
Creep is the slow change inn dimensions of the amaglam due to prolonged exposure to stress
What happens when amalgam get contaminated with moisture
Bubbles of hydrogen from the water cause excessive delayed expansion
The compressive strength of amalgam 20 mins after placement
6%
What is the vice
Is a box shaped at the lower end of the retainer that has an opening for threaded spindle to move in
and out of.
4/24/2026
What functions as a receptacle for the side and ends of the matrix
Guide slot in the vice
3
