Dental Materials - FINAL EXAM
QUESTIONS AND ANSWERS
Why do we do sealants? CORRECT ANSWERS It is one of the best-prevented things
we can do for teeth.
How do we preform sealants? CORRECT ANSWERS 1. Clean the tooth
2. Isolate the tooth
3. Dry the tooth
4. Use etchant for 30-60 seconds
5. Wash the tooth
6. Dry the dry
7. Apply composite
8. Cure with light
9. Use explorer to make sure hard
10. Check occlusion with articulating paper
How many pits are in a tooth? CORRECT ANSWERS 4
What is the acid or etchant used when sealing a tooth? CORRECT ANSWERS 37%
Orthophosphoric
What is the purpose of acid-etching? CORRECT ANSWERS Used to bond materials to
enamel. We want the filling material to be able to run down into the enamel and cure it
so that it can't come out.
What are Direct Material? (Give 3 examples) CORRECT ANSWERS Materials that are
used in chair of operatory
Ex. Composites, Amalgam, Sealants, Impression Making, etc.
What causes failure of sealants? CORRECT ANSWERS Saliva contamination and high
occlusion on sealant material
When do we typically do our first sealant? CORRECT ANSWERS 6-8 years of age
When etching, how do you know when you've done so properly? CORRECT
ANSWERS A white, chalky, or frosty look to the tooth; under a microscope it will show a
"honeycomb" appearance.
What are Indirect Materials? (Give 3 examples) CORRECT ANSWERS Materials that
are made in the laboratory
Ex. Dentures, Crowns, Bridges, Partial dentures, Bleaching/whitening trays, mouth
guards, etc.
, What are crowns made out of? CORRECT ANSWERS Zirconia & Lithium disilicate
What are partial dentures made out of? (Base, teeth, metal) CORRECT ANSWERS The
base is made of Methyl Methacrylate(pink part);
The teeth are plastic or porcelain;
The metal is made of chrome-cobalt metal
What are implants made out of? CORRECT ANSWERS Titanium and Titanium Alloy
What is ADA and what do they do? CORRECT ANSWERS American Dental
Association;
They are the seal of approval given by the ADA to certify materials.
Who is CDC and what do they do? CORRECT ANSWERS Center for Disease Control
They set regulations and issue suggestions; they have no authority.
Who is the EPA and what do they do? CORRECT ANSWERS Environmental Protection
Agency;
They regulate the disposal of solutions and hazard waste.
Who is the FDA and what do they do? CORRECT ANSWERS Food and Drug
Administration;
They regulate all medications and medical devices, such as implants and bone graft
materials.
What is the ISO? CORRECT ANSWERS International Standard Organization;
They attempt to unify standards throughout its member countries.
Who is OSHA and what do they do? CORRECT ANSWERS Occupational Safety and
Health Administration;
Regulating body that enforces the requirements established for employers to protect
their employees; They protect employees from blood & OPIM (other potentially
infectious material)
What are the four categories based on their atomic structure and bonds of materials?
CORRECT ANSWERS 1. Metals
2. Ceramics
3. Polymers/Plastics
4. Composites
What is Etchant? CORRECT ANSWERS An acid or corrosive chemical used in etching.
Stress and strain CORRECT ANSWERS Putting a strain on the composite that
eventually makes it break.
QUESTIONS AND ANSWERS
Why do we do sealants? CORRECT ANSWERS It is one of the best-prevented things
we can do for teeth.
How do we preform sealants? CORRECT ANSWERS 1. Clean the tooth
2. Isolate the tooth
3. Dry the tooth
4. Use etchant for 30-60 seconds
5. Wash the tooth
6. Dry the dry
7. Apply composite
8. Cure with light
9. Use explorer to make sure hard
10. Check occlusion with articulating paper
How many pits are in a tooth? CORRECT ANSWERS 4
What is the acid or etchant used when sealing a tooth? CORRECT ANSWERS 37%
Orthophosphoric
What is the purpose of acid-etching? CORRECT ANSWERS Used to bond materials to
enamel. We want the filling material to be able to run down into the enamel and cure it
so that it can't come out.
What are Direct Material? (Give 3 examples) CORRECT ANSWERS Materials that are
used in chair of operatory
Ex. Composites, Amalgam, Sealants, Impression Making, etc.
What causes failure of sealants? CORRECT ANSWERS Saliva contamination and high
occlusion on sealant material
When do we typically do our first sealant? CORRECT ANSWERS 6-8 years of age
When etching, how do you know when you've done so properly? CORRECT
ANSWERS A white, chalky, or frosty look to the tooth; under a microscope it will show a
"honeycomb" appearance.
What are Indirect Materials? (Give 3 examples) CORRECT ANSWERS Materials that
are made in the laboratory
Ex. Dentures, Crowns, Bridges, Partial dentures, Bleaching/whitening trays, mouth
guards, etc.
, What are crowns made out of? CORRECT ANSWERS Zirconia & Lithium disilicate
What are partial dentures made out of? (Base, teeth, metal) CORRECT ANSWERS The
base is made of Methyl Methacrylate(pink part);
The teeth are plastic or porcelain;
The metal is made of chrome-cobalt metal
What are implants made out of? CORRECT ANSWERS Titanium and Titanium Alloy
What is ADA and what do they do? CORRECT ANSWERS American Dental
Association;
They are the seal of approval given by the ADA to certify materials.
Who is CDC and what do they do? CORRECT ANSWERS Center for Disease Control
They set regulations and issue suggestions; they have no authority.
Who is the EPA and what do they do? CORRECT ANSWERS Environmental Protection
Agency;
They regulate the disposal of solutions and hazard waste.
Who is the FDA and what do they do? CORRECT ANSWERS Food and Drug
Administration;
They regulate all medications and medical devices, such as implants and bone graft
materials.
What is the ISO? CORRECT ANSWERS International Standard Organization;
They attempt to unify standards throughout its member countries.
Who is OSHA and what do they do? CORRECT ANSWERS Occupational Safety and
Health Administration;
Regulating body that enforces the requirements established for employers to protect
their employees; They protect employees from blood & OPIM (other potentially
infectious material)
What are the four categories based on their atomic structure and bonds of materials?
CORRECT ANSWERS 1. Metals
2. Ceramics
3. Polymers/Plastics
4. Composites
What is Etchant? CORRECT ANSWERS An acid or corrosive chemical used in etching.
Stress and strain CORRECT ANSWERS Putting a strain on the composite that
eventually makes it break.
