Dental Material Exam 1 Questions AND Correct Answers
_____ Clean surface is rinsed with water.
_____ Etched surface is rinsed with water.
_____ Bonding resin is applied.
_____ Enamel is cleaned with pumice.
_____ Cleaned surface is dried with air.
_____ Etched surface is dried with air.
_____ Restorative material is applied.
_____ Etchant is applied. - ✔✔1. Enamel is cleaned with pumice
2. Clean surface is rinsed with water
3. Clean surface is dried with air
4. Etchant is applied (15-30 sec)
5. Etched surface is rinsed with water
6. Etched surface is dried with air
7. Bonding resin is applied
8. Restorative material is applied
10. The following are all historical fallacies about dentinal bonding
except one. Which one is the EXCEPTION?
(a) Composites irritate the pulp
(b) Dentin should not be etched
(c) The smear layer is "dentinal debris"
,(d) The smear layer should be left to protect the pulp - ✔✔(c) The
smear layer is "dentinal debris"
14. _______________ is the force used to condense an amalgam in a
preparation.
15. A hardened cement having "low" _________________ can firmly
hold a patient's gold crown in place for years in a wet environment.
16. ________________ is the term given to the increase of stress
around defects within an object.
(a) Solubility
(b) Compression
(c) Stress concentration
(d) Viscosity - ✔✔14. Compression
15. Solubility
16. Stress Concentration
A combination of a pit and fissure sealant and a composite restoration
is termed:
a) Flowable composite
b) Condensable composite
c) Compomer
d) Preventive resin restoration - ✔✔d) Preventive resin restoration
,A dental polymer with many cross-links as compared to one with no
cross-links would be a dental material that is:
a) Flexible but strong
b) Flexible and weak
c) Stiff and strong
d) Stiff but weak - ✔✔c) Stiff and strong
A drop of water on a Popsicle is an example of:
a) Poor wetting (low contact angle)
b) Good wetting (high contact angle)
c) Good wetting (low contact angle)
d) Poor wetting (high contact angle) - ✔✔c) Good wetting (low
contact angle)
A dull sound when an instrument is being used on these surfaces
should be evident with which of the following materials?
a) Gold foil and base metal alloys
b) Enamel and dentin
c) Amalgam and cast gold
d) Composite and glass ionomer - ✔✔d) Composite and glass ionomer
A mixture of two liquids that do not blend together to form one liquid
is termed a (an):
, a) Composite
b) Emulsion
c) Colloid
d) Solution - ✔✔b) Emulsion
A notable advantage of using ceramic materials in dentistry is the
property of:
a) Transparency
b) Translucency
c) Opacity
d) Brittleness - ✔✔b) Translucency
A partial charge resulting from an uneven distribution of electrons
around an atom forms a bond known as:
a) Metallic
b) Secondary
c) Covalent
d) Ionic - ✔✔b) Secondary
A restorative material that initially releases some fluoride- like glass
ionomers but bonds and sets like composites is called:
a) Flowable composites
b) Condensable composite
_____ Clean surface is rinsed with water.
_____ Etched surface is rinsed with water.
_____ Bonding resin is applied.
_____ Enamel is cleaned with pumice.
_____ Cleaned surface is dried with air.
_____ Etched surface is dried with air.
_____ Restorative material is applied.
_____ Etchant is applied. - ✔✔1. Enamel is cleaned with pumice
2. Clean surface is rinsed with water
3. Clean surface is dried with air
4. Etchant is applied (15-30 sec)
5. Etched surface is rinsed with water
6. Etched surface is dried with air
7. Bonding resin is applied
8. Restorative material is applied
10. The following are all historical fallacies about dentinal bonding
except one. Which one is the EXCEPTION?
(a) Composites irritate the pulp
(b) Dentin should not be etched
(c) The smear layer is "dentinal debris"
,(d) The smear layer should be left to protect the pulp - ✔✔(c) The
smear layer is "dentinal debris"
14. _______________ is the force used to condense an amalgam in a
preparation.
15. A hardened cement having "low" _________________ can firmly
hold a patient's gold crown in place for years in a wet environment.
16. ________________ is the term given to the increase of stress
around defects within an object.
(a) Solubility
(b) Compression
(c) Stress concentration
(d) Viscosity - ✔✔14. Compression
15. Solubility
16. Stress Concentration
A combination of a pit and fissure sealant and a composite restoration
is termed:
a) Flowable composite
b) Condensable composite
c) Compomer
d) Preventive resin restoration - ✔✔d) Preventive resin restoration
,A dental polymer with many cross-links as compared to one with no
cross-links would be a dental material that is:
a) Flexible but strong
b) Flexible and weak
c) Stiff and strong
d) Stiff but weak - ✔✔c) Stiff and strong
A drop of water on a Popsicle is an example of:
a) Poor wetting (low contact angle)
b) Good wetting (high contact angle)
c) Good wetting (low contact angle)
d) Poor wetting (high contact angle) - ✔✔c) Good wetting (low
contact angle)
A dull sound when an instrument is being used on these surfaces
should be evident with which of the following materials?
a) Gold foil and base metal alloys
b) Enamel and dentin
c) Amalgam and cast gold
d) Composite and glass ionomer - ✔✔d) Composite and glass ionomer
A mixture of two liquids that do not blend together to form one liquid
is termed a (an):
, a) Composite
b) Emulsion
c) Colloid
d) Solution - ✔✔b) Emulsion
A notable advantage of using ceramic materials in dentistry is the
property of:
a) Transparency
b) Translucency
c) Opacity
d) Brittleness - ✔✔b) Translucency
A partial charge resulting from an uneven distribution of electrons
around an atom forms a bond known as:
a) Metallic
b) Secondary
c) Covalent
d) Ionic - ✔✔b) Secondary
A restorative material that initially releases some fluoride- like glass
ionomers but bonds and sets like composites is called:
a) Flowable composites
b) Condensable composite
