NDAEB FINAL PAPER 2026 QUESTIONS WITH
FULL ANSWERS
◉ What two ways are liners supplied as. Answer: A two-paste
system or a light-cured material.
◉ Where is dental varnish placed. Answer: Within the entire
preparation.
◉ What does a dental varnish do. Answer: 1. Seals dentinal tubules.
2. Reduces microleakage around a restoration.
3. Acts as a barrier to protect the tooth from highly acidic cements
such as zinc phosphor.
◉ Is varnish placed before or after the dental liner?. Answer: Always
after the liner.
◉ True or false: Dental varnish interferes with the bonding and
setting reaction of composite and glass ionomer restorations?.
Answer: True. Varnish is contraindicated with composite and glass
ionomer restorative material.
◉ What is the other named used for a desensitizer?. Answer: Primer.
,◉ What does a desensitizer do?. Answer: It seals the dentinal
tubules thus preventing oral fluids from seeping between the tooth
and the restoration.
◉ What 3 ways does base provide pulpal protection?. Answer:
Protective base: placed when necessary to protect pulp before the
restoration is placed, postop sensitivity and damage to pulp may
occur without it.
Insulating base: placed in deep cavities to protect tooth from
thermal shock.
Sedative base: help soothe pulp that has been damaged by decay or
has been irritated during the process of removing decay.
◉ 4 different types of base materials:. Answer: Zinc oxide-eugenol
(ZOE) - insulating/sedative base. Eugenol has a soothing effect on
painful, irritated pulp. Cannot be used with composite restoration,
glass ionomer, or other resin resto's.
Zinc Phosphate - insulating base. very acidic, can be irritating to
pulp. necessary to place cavity liner prior.
Polycarboxylate - protective/insulating base. Nonirritating and can
be placed under all types of restorations.
Glass ionomer - excellent adhesion to enamel and to dentin. fluoride
release.
,◉ Where is a base placed in a cavity prep?. Answer: Entire pulpal
floor is covered with a thickness of 1-2mm.
◉ What is tooth etchant a critical component for a restoration?.
Answer: It helps restorative material create a better chemical bond
with the tooth structure.
◉ What does dental etchant do?. Answer: Removes the smear layer
in preparation for a composite resin or sealant.
◉ What is the most common recommended time for dental etchants
to be placed on a tooth?. Answer: 15-20 seconds.
◉ What is the 'smear layer'?. Answer: A very thin layer of debris
composed of fluids and tooth components that remain on the dentin
after cavity preparation has been completed.
◉ The 3 types of dental cements accords to their properties and
intended use in dentistry:. Answer: Type I: "luting agent", meant to
act as an adhesive to hold an indirect restoration to the tooth
structure or to adhere brackets to a tooth surface. This includes
temp and perm cements.
Type II: cements that could be used as a restorative material, such as
IRM.
, Type III: include liners and bases that are placed within the cavity
prep.
◉ Variables that may affect final cementation:. Answer: Mixing time,
humidity (addition of water to powder or loss of water from liquid),
powder-to-liquid ratio, & temperature.
◉ Can a glass ionomer cement be used as a restorative material?.
Answer: Yes. This would be "Type II" and is meant for restoring
areas of erosion in Class V.
◉ What advantages are there to using a glass ionomer material?.
Answer: - Fluoride release.
- Less trauma or shock to pulp.
- Very thin film thickness.
- Low solubility in the mouth.
◉ ZOE Cements:. Answer: Type I: (Tempbond) used for temporary
cements as it lacks strength and long-term durability.
Type II: includes added reinforcing agents, thus it is used for
permanent cementation of cast restorations or appliances.
FULL ANSWERS
◉ What two ways are liners supplied as. Answer: A two-paste
system or a light-cured material.
◉ Where is dental varnish placed. Answer: Within the entire
preparation.
◉ What does a dental varnish do. Answer: 1. Seals dentinal tubules.
2. Reduces microleakage around a restoration.
3. Acts as a barrier to protect the tooth from highly acidic cements
such as zinc phosphor.
◉ Is varnish placed before or after the dental liner?. Answer: Always
after the liner.
◉ True or false: Dental varnish interferes with the bonding and
setting reaction of composite and glass ionomer restorations?.
Answer: True. Varnish is contraindicated with composite and glass
ionomer restorative material.
◉ What is the other named used for a desensitizer?. Answer: Primer.
,◉ What does a desensitizer do?. Answer: It seals the dentinal
tubules thus preventing oral fluids from seeping between the tooth
and the restoration.
◉ What 3 ways does base provide pulpal protection?. Answer:
Protective base: placed when necessary to protect pulp before the
restoration is placed, postop sensitivity and damage to pulp may
occur without it.
Insulating base: placed in deep cavities to protect tooth from
thermal shock.
Sedative base: help soothe pulp that has been damaged by decay or
has been irritated during the process of removing decay.
◉ 4 different types of base materials:. Answer: Zinc oxide-eugenol
(ZOE) - insulating/sedative base. Eugenol has a soothing effect on
painful, irritated pulp. Cannot be used with composite restoration,
glass ionomer, or other resin resto's.
Zinc Phosphate - insulating base. very acidic, can be irritating to
pulp. necessary to place cavity liner prior.
Polycarboxylate - protective/insulating base. Nonirritating and can
be placed under all types of restorations.
Glass ionomer - excellent adhesion to enamel and to dentin. fluoride
release.
,◉ Where is a base placed in a cavity prep?. Answer: Entire pulpal
floor is covered with a thickness of 1-2mm.
◉ What is tooth etchant a critical component for a restoration?.
Answer: It helps restorative material create a better chemical bond
with the tooth structure.
◉ What does dental etchant do?. Answer: Removes the smear layer
in preparation for a composite resin or sealant.
◉ What is the most common recommended time for dental etchants
to be placed on a tooth?. Answer: 15-20 seconds.
◉ What is the 'smear layer'?. Answer: A very thin layer of debris
composed of fluids and tooth components that remain on the dentin
after cavity preparation has been completed.
◉ The 3 types of dental cements accords to their properties and
intended use in dentistry:. Answer: Type I: "luting agent", meant to
act as an adhesive to hold an indirect restoration to the tooth
structure or to adhere brackets to a tooth surface. This includes
temp and perm cements.
Type II: cements that could be used as a restorative material, such as
IRM.
, Type III: include liners and bases that are placed within the cavity
prep.
◉ Variables that may affect final cementation:. Answer: Mixing time,
humidity (addition of water to powder or loss of water from liquid),
powder-to-liquid ratio, & temperature.
◉ Can a glass ionomer cement be used as a restorative material?.
Answer: Yes. This would be "Type II" and is meant for restoring
areas of erosion in Class V.
◉ What advantages are there to using a glass ionomer material?.
Answer: - Fluoride release.
- Less trauma or shock to pulp.
- Very thin film thickness.
- Low solubility in the mouth.
◉ ZOE Cements:. Answer: Type I: (Tempbond) used for temporary
cements as it lacks strength and long-term durability.
Type II: includes added reinforcing agents, thus it is used for
permanent cementation of cast restorations or appliances.
