dental materials

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dental materials
2011-02-03 00:35:32
chapter three application manipulation

week three
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  1. Materials are classified by their application, how they will be utilized and fabricated, and their expected lingevity, what are three classification types?
    • preventive
    • therapeutic
    • restorative
  2. Fluorides and pit and fissure sealants are what type of material?
  3. medicated bases or topical treatments for periodontal disease, and other materials used in the treatement of disease are what type of material?
  4. What type of material is the largest classification and applies to any filling, inlay, crown, bridge, implant, or partial or complete denture that restores or replaces lost tooth structure, teeth, or oral tissue?
  5. restorations may be further classified to what 2 subdivisions?
    • direct
    • indirect
  6. materials fabricate directly in the mouth are what type of restorative material? give examples?
    • direct
    • amalgam
    • composite
  7. materials fabricated outside of the mouth then placed in the oral environment are what type of restorative material? give examples
    • indirect
    • porcelain fused to metal crowns
  8. What type of restoration is expected to be a long-lasting replacement for missing, damaged, or miscolored teeth?
    permanent restoration
  9. What type of restoration is placed for a limited time from several days to months?
    intermediate restoration
  10. Many components are classified as _______ and base.
  11. What component is responsible for the speed at which the reaction of the 2 components occurs and is often the liquid component?
  12. When components are mixed together, a reaction occurs, what are 2 types of reactions it might be?
    • physical
    • chemical
  13. reaction such as the evaporation or cooling or liquid
  14. reaction such as creating new primary bonds; a catalyst + base
  15. before a material reaches its ultimate state, the process goes through 2 stages; both of which are defined in units of time. What are these stages?
    • manipulation
    • reaction
  16. which stage includes the mixing time and working time?
    manipulation stage
  17. Which stage includes the initial set time and final set time?
    reaction stage
  18. the length of time the auxillary has to bring the components together into a homogenous mix
    mixing time
  19. the time permitted to manipulate the material in the mouth
    working time
  20. time that begins when the material no longer can be manipulated in the mouth
    initial set time
  21. time that occurs when the material has reached its ultimate set
    final set time
  22. mixing slowly and cooling the components may _______ the working time; ; and the addition of a catalyst may _________ working time.
    • increase
    • decrease
  23. true or false. moisture contamination from saliva and blood, during initial set time may have an adverse effect on many dental materials, causing them to fail
  24. What is essential for avoiding fractures of restorative materials?
    appropriate patient postoperative instructions on when and what to eat, or how to place pressure on the restoration
  25. variables in the manipulation of the material begin with the ________ of the components
  26. In the manipulation and ratio of materials, it is very important to follow what instructions?
  27. In general, high temperatures and humidity will _________ the reaction of the material, and low temperatures and humidity will _______ the reaction
    • accelerate
    • retard