EFDA OREGON STUDY QUESTIONS WITH
CORRECT ANSWERS
Etchant ? - CORRECT ANSWER -Critical for enamel and dentin in the cavity prep for good
chemical bond.
Glass Ionomer used as a base? - CORRECT ANSWER -Good adhesion to enamel and dentin,
release fluoride and has bonding strengths.
Zinc-oxide-eugenol type 1used as a base? - CORRECT ANSWER -Sedative, insulating helps with
irrated pulp. CANT USE UNDER GLASS IONOMER AND COMPOSTIE.
Zinc phosphate type 2 used as a base? - CORRECT ANSWER -Good base for it thermal insulation
qualities and can be used under polycarboxylate, ionomer and it can irrate the pulp.
Trituration - CORRECT ANSWER -Means mixing dental alloy with mercury.
Amalgamation - CORRECT ANSWER -Actual chemical reaction that occurs between the alloy and
mercury.
Alloy - CORRECT ANSWER -Combination between alloy and mercury.
Polycarboxylate used as a base? - CORRECT ANSWER -Has elastic properties and contains
fluoride and can be put under any restoration. Also proactive and insulating.
IRM used as a base? - CORRECT ANSWER -last for 6-12 months and is temp. Also has a sedative
base.
, Sedative base ? - CORRECT ANSWER -Help with soothing the pulp for decay that is irrating the
pulp.
Insulating base? - CORRECT ANSWER -Placed in deep cavity preps to protect the tooth from
thermal shock.
Protective base? - CORRECT ANSWER -Placed before the restoration is place to protect the pulp.
Primer? - CORRECT ANSWER -Can also be know as desensitizer. Placed under restorative
material.
Fluoride varnish? - CORRECT ANSWER -Release fluoride on enamel, root structure and the
dentin surfaces.
Varnish? - CORRECT ANSWER -Organic solvent, seals dentin tubules and reduces microleakage.
Micro- mechanical? - CORRECT ANSWER -Retention between the tooth structure and the
restoration.
Three things dental bases can do for the tooth? - CORRECT ANSWER -1. protective base
2. insulating base
3. sedative base
Calcium Hydroxide? - CORRECT ANSWER -Used as a base/ liner, promotes secondary dentin.
Smear layer? - CORRECT ANSWER -Very thin layer of debris on newly prepared dentin.
CORRECT ANSWERS
Etchant ? - CORRECT ANSWER -Critical for enamel and dentin in the cavity prep for good
chemical bond.
Glass Ionomer used as a base? - CORRECT ANSWER -Good adhesion to enamel and dentin,
release fluoride and has bonding strengths.
Zinc-oxide-eugenol type 1used as a base? - CORRECT ANSWER -Sedative, insulating helps with
irrated pulp. CANT USE UNDER GLASS IONOMER AND COMPOSTIE.
Zinc phosphate type 2 used as a base? - CORRECT ANSWER -Good base for it thermal insulation
qualities and can be used under polycarboxylate, ionomer and it can irrate the pulp.
Trituration - CORRECT ANSWER -Means mixing dental alloy with mercury.
Amalgamation - CORRECT ANSWER -Actual chemical reaction that occurs between the alloy and
mercury.
Alloy - CORRECT ANSWER -Combination between alloy and mercury.
Polycarboxylate used as a base? - CORRECT ANSWER -Has elastic properties and contains
fluoride and can be put under any restoration. Also proactive and insulating.
IRM used as a base? - CORRECT ANSWER -last for 6-12 months and is temp. Also has a sedative
base.
, Sedative base ? - CORRECT ANSWER -Help with soothing the pulp for decay that is irrating the
pulp.
Insulating base? - CORRECT ANSWER -Placed in deep cavity preps to protect the tooth from
thermal shock.
Protective base? - CORRECT ANSWER -Placed before the restoration is place to protect the pulp.
Primer? - CORRECT ANSWER -Can also be know as desensitizer. Placed under restorative
material.
Fluoride varnish? - CORRECT ANSWER -Release fluoride on enamel, root structure and the
dentin surfaces.
Varnish? - CORRECT ANSWER -Organic solvent, seals dentin tubules and reduces microleakage.
Micro- mechanical? - CORRECT ANSWER -Retention between the tooth structure and the
restoration.
Three things dental bases can do for the tooth? - CORRECT ANSWER -1. protective base
2. insulating base
3. sedative base
Calcium Hydroxide? - CORRECT ANSWER -Used as a base/ liner, promotes secondary dentin.
Smear layer? - CORRECT ANSWER -Very thin layer of debris on newly prepared dentin.
