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35 Cards in this Set
- Front
- Back
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Explain the importance of the study of dental materials for the allied health practitioner.
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Safety: handling, disposal,
Maintenance: cleaning, polishing Delivery: behavior of material, Manipulation, assisting of delivery of material Patient Education: options of material choices |
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Explain why it is necessary that the allied oral health practitioner have an understanding of dental materials for the delivery of dental care.
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To help ensure the ultimate success of a patients dental work
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EBDM |
Evidence-Based Decision Making |
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ADA |
American Dental Association |
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FDA |
Food and Drug Administration |
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ISO |
International Standards Organization |
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What are the qualities of the oral environment that make it challenging for long-term clinical performance of dental materials?
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Materials must be compatible in an environment of moisture and differing stresses, temperatures, and acid levels. The degrees of compatibility depend on how and how long the materials are expected to be used.
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What are the long-term clinical requirements of therapeutic and restorative materials?
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Therapeutic agents- Used to treat disease, are used for short periods
Restorative agents- used to reconstruct tooth structures, expected to remain in contact with tissues for indefinite lengths of time |
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What is tensile force? |
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What is compressive force? |
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What is shearing force? |
Force side to side, like scissors |
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What is stress? |
The internal force, that resists the applied force |
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What is strain? |
Distortion when an object cannot resist stress |
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What is ultimate strength? |
Maximum amount of stress a material can withstand without breaking |
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What are the effects of moisture and acidity on dental materials?
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The breakdown of most restorative materials is directly related to the effects of moisture, acid, and stress.
-low solubility -materials planned for long term retention -corrosion -tarnish- discoloration due to oxidation |
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What is thermal conductivity? |
Rate at which heat flows through a material.
This may cause sensitivity because of foods and drinks. |
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What is mechanical adhesion? |
The use of undercuts or other projections into which materials are locked in place. |
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What is chemical adhesion? |
Dental cement, "glue" |
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What is bonding retention? |
When you go through the process of etching, placing bonding materials, and then placing the bonding material on tooth. |
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What is microleakage? |
Leakage of fluids and bacteria into the gaps of teeth caused by improper placement of restorations. |
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What are the components of OSHA? |
To work together to attain a certain objective, to prevent injuries and illness in the workplace |
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What are the ways that chemicals can enter the body? |
-Inhalation -Absorption through the skin -Ingestion -Through a break in the skin |
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What are primary bonds?
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Primary: the stronger bonds that hold atoms together
b/c they involve the exchanging or sharing of electrons. Ex: Ionic bonds, covalent bonds, metallic bonds |
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What are second bonds?
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Weaker bonds that no transfer or sharing of electrons occurs. Leads to deformation or fracture.
Ex: Hydrogen bonds |
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What are the 3 types of matter? |
Solid, liquid, and gas |
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What is hardness? |
The resistance of a solid to penetration. It contributes to abrasion resistance because it less likely to abrase |
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What is elasticity?
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Ability of a material to recover its shape after deformation from an applied force
Ex: impression materials |
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What is ductility? |
The ability of an object to be pulled or stretched under tension without rupture |
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What is malleability? |
The ability to be compressed and formed into a thin sheet without rupture |
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What is toughness? |
Ability of a material to resist fracture |
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What is resilience? |
Resistance of a material to permanent deformation |
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What is viscosity? |
The ability of a liquid material to flow |
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What is thixotropic? |
Property of a liquid to flow more readily under mechanical force |
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What are the requirements necessary for a consumer product to qualify for the ADA Seal of acceptance?
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-Submit ingredients list and other product information.
-Supply object data from unclinical and laboratory studies 1. Conduct clinical trials as needed in strict compliance with ADA guidelines and procedures 2. Provide evidence that manufacturing and laboratory facilities are properly supervised. 3. Submit all product packaging and labeling for review and approved by the ADA and comply with ADA. |
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What is thermal expansion?
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The tendency of matter to change in volume in response to change in temp, through heat transfer.
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