DHG 212 Final Exam, Dental Hygiene Program, Academic Year 2026 – Study
Guide and Practice Questions
what resources are used to choose dental materials? - correct answer ✔✔ ISO, FDA, ADA, WHO
- International agencies
- Standards to develop specifications and testing at the international level
- Maintain procedures meet requirements - correct answer ✔✔ FDI World Dental
Federation/Organization for Standardization (ISO)
- Medical device Amendment 1976 (includes dental devices)
Class I: lowest risk - gloves, prophy paste
Class II: moderate risk - amalgam and composite
Class III: most regulated - implants and bone-grafting - correct answer ✔✔ U.S. Food and Drug
Administration (FDA) 1906
1930: ADA established guidelines for testing of products and warded first Seal of Acceptance in
1931
2005: ADA for consumer products only
2006: ADA professional product review includes lab date and clinician feedback - correct answer
✔✔ American Dental Association (ADA) Est. 1859
Strengthened the work to reduce risks to human health and the environment from the use and
release of mercury by recommending alternatives to amalgam containing restorations - correct
answer ✔✔ World Health Organization (WHO)
- Designed to help consumers make informed decisions about the safety and efficiency of
products
, - Testing products
- Within safe limits
- FOR CONSUMERS NOT PRACTITIONERS - correct answer ✔✔ ADA seal
what material has the highest ultimate compressive strength? - correct answer ✔✔ amalgam
measurement of change in volume in relation to change in temperature - correct answer ✔✔
coefficient of thermal expansion
what material has closet CTE to enamel? - correct answer ✔✔ porcelain ceramic
what materials has closest thermal conductivity to enamel? - correct answer ✔✔ composites
(like tooth structure)
best thermal conductor - correct answer ✔✔ gold
What temperature and humidity accelerates material in mixing? - correct answer ✔✔ high
temps/humidity
What temperature and humidity slow down material in mixing? - correct answer ✔✔ low
temp/humidity
a chemical agent that slows down a chemical reaction - correct answer ✔✔ retards reaction
symptoms of acute toxicity - correct answer ✔✔ dizziness, fainting, headache, nausea, and
vomiting
who provides SDS? - correct answer ✔✔ OSHA, manufacturer
Guide and Practice Questions
what resources are used to choose dental materials? - correct answer ✔✔ ISO, FDA, ADA, WHO
- International agencies
- Standards to develop specifications and testing at the international level
- Maintain procedures meet requirements - correct answer ✔✔ FDI World Dental
Federation/Organization for Standardization (ISO)
- Medical device Amendment 1976 (includes dental devices)
Class I: lowest risk - gloves, prophy paste
Class II: moderate risk - amalgam and composite
Class III: most regulated - implants and bone-grafting - correct answer ✔✔ U.S. Food and Drug
Administration (FDA) 1906
1930: ADA established guidelines for testing of products and warded first Seal of Acceptance in
1931
2005: ADA for consumer products only
2006: ADA professional product review includes lab date and clinician feedback - correct answer
✔✔ American Dental Association (ADA) Est. 1859
Strengthened the work to reduce risks to human health and the environment from the use and
release of mercury by recommending alternatives to amalgam containing restorations - correct
answer ✔✔ World Health Organization (WHO)
- Designed to help consumers make informed decisions about the safety and efficiency of
products
, - Testing products
- Within safe limits
- FOR CONSUMERS NOT PRACTITIONERS - correct answer ✔✔ ADA seal
what material has the highest ultimate compressive strength? - correct answer ✔✔ amalgam
measurement of change in volume in relation to change in temperature - correct answer ✔✔
coefficient of thermal expansion
what material has closet CTE to enamel? - correct answer ✔✔ porcelain ceramic
what materials has closest thermal conductivity to enamel? - correct answer ✔✔ composites
(like tooth structure)
best thermal conductor - correct answer ✔✔ gold
What temperature and humidity accelerates material in mixing? - correct answer ✔✔ high
temps/humidity
What temperature and humidity slow down material in mixing? - correct answer ✔✔ low
temp/humidity
a chemical agent that slows down a chemical reaction - correct answer ✔✔ retards reaction
symptoms of acute toxicity - correct answer ✔✔ dizziness, fainting, headache, nausea, and
vomiting
who provides SDS? - correct answer ✔✔ OSHA, manufacturer
