Chapter 4 Acrylic resins

The flashcards below were created by user haitianwifey on FreezingBlue Flashcards.

  1. Name some properties of acrylics
    • Easily colored
    • Acrylic resins are hard, brittle, glassy polymers
    • They are biocompatible
  2. In acrylics the monomers are linked together to form
  3. The most common acrylic monomer is
    methyl methacrylate
  4. Example of non dental use is
  5. What turns on the initiator
  6. What starts the reaction by opening up the carbon double bond
  7. The monomer is the
    An organic molecule containing carbon-carbon double bond
  8. When the initiator frees the electron it creates a
    free radical (C-C*).
  9. What reactions that acrylics use is
    Addition Polymerization
  10. What are acrylics used for
    • removable prosthetics
    • custom trays
    • orthodontic appliances
  11. What are the types of activators
    • —Heat
    • —Light—
    • Chemical
  12. Setting is the process of
  13. When polymers are crosslinked , a bunch of chains all become
    one big molecule
  14. Crosslinking agents are
    side groups of polymers that are made are made of molecules that tie the growing chains together into one solid mass
  15. Crosslinked agents result in a product that has
    Increased strength, increased toughness of material, and reduced brittleness of the final product
  16. ________allows for more flexible dentures, more resilient to impact
  17. Copolymers is the
    use of two or more different monomers when polymerizing final product
  18. The addition polymerization reaction leads to some monomer being leftover in final product called
    Residual Monomer
  19. As propagation continues, the solidifying mass _______ and the end product is ______
    • shrinks
    • smaller
  20. What are some uses for plastic polymers in dentistry
    • —Denture bases
    • —Artificial teeth—
    • Sealants—
    • Tooth colored restoratives ex. composite fillings
    • —Orthodontic appliances
    • —Reline materials—
    • Impression materials
  21. Cold Cured Acrylic Resin is also called
    Self cure and chemical cure
  22. What are Cold Cured Acrylic Resin used for
    —Used for repairs on denture bases, orthodontic appliances, custom trays, temporary crowns
  23. Cold Cured Acrylic Resin are supplied
    powder and liquid
  24. The liquid of a Cold Cured Acrylic Resin contains
    • Monomer = Methylmethacrylate
    • Inhibitor = Hydroquinone
    • Activator = a tertiary amine
  25. The powders of a Cold Cured Acrylic Resin contains
    • Polymethylmethacrylate resin (PMMA)
    • Initiator = Benzoyl peroxide
    • Coloring agents
    • Copolymers
  26. What are some comparisons of Cold Cure Acrylic vs Heat activated acrylic
    • Cold cure acrylic has less shrinkage than heat cured acrylic
    • Cold cure acrylic has more residual monomer than with heat activated acrylic
    • Cold cure acrylic has less heat thanheat activated acrylic, however, heat is still generated
  27. What are Heat Cured Denture Resin used for
    to fabricate tissue coverage of full and partial denture saddles (everything except the teeth)
  28. How is Heat Cured Denture Resin supplied as
    powder and liquid
  29. What is the activator for the Heat Cured Denture Resin
    hot water bath
  30. The liquid of a Heat Cured Denture Resin contains
    Monomer = Methylmethacrylate (MMA)  Inhibitor = Hydroquinone (preservative)                  Cross Linking Agent
  31. The powder of a Heat Cured Denture Resin
    • Polymethylmethacrylate resin (PMMA) 
    • Initiator = Benzoyl Peroxide
    • Coloring Agents
    • Copolymers
  32. Dual cure is cured by both
    • light and chemical cure.
    • Light starts the cure, and it is finished chemically.)
  33. Porosity is a major concern because it leads to
  34. What are the Physical Properties of Denture Acrylic
    • —Low Impact Strength – easily broken—
    • Low Abrasion Resistance – take care when cleaning
    • —Warping – never store or clean with hot water—
    • Porosity – microporosity allows for growth of microorganisms
  35. Complete dentures are made up of what two parts
    • —the denture teeth and
    • the denture base
  36. What is the denture base
    the pink part of the denture that sits on the alveolar ridge
  37. What follows the extraction of teeth
    Resorption of ridge
  38. Acrylic teeth are _________  into the base
    chemically bonded
  39. The most common types of teeth is
    acrylic teeth
  40. The occlusal forces of acrylic teeth as compared to porcelain teeth are
    softer and much kinder to the opposing teeth and ridge
  41. Porcelain teeth are held in place
    only by mechanical retention (a pin)
  42. Which is more porous acrylic or porcelain
  43. What are the steps to fabricating a denture
    • —Custom Tray and Final Impression—
    • Preliminary Impression and Cast—
    • Wax Rims and Records
    • —Wax Try-In—
    • Processing, Finishing, Polishing
    • Delivery, Follow-up
  44. The preliminary impression and cast is taken with
    —a stock tray
  45. The final impression with a custom tray is taken with what type of material
    —vinylpolysiloxane or ZOE
  46. What is —used to record the maxillary and mandibular relationship and arranging teeth
    wax rims
  47. Wax rims are made with
    Wax or Acrylic
  48. Wax rims are also called
    occlusal rims
  49. What is sometimes used to impress the borders of a final impression
    Impression compound
  50. We make dentures with what kind of arylic
  51. Processing the denture involves
    removing the wax and replacing it with acrylic
  52. A removable partial denture uses some of the remaining teeth to serve as ______ to assist the retention of the prosthesis
  53. An RPD is composed of a ______ and ______ that are holding the denture teeth
    • metal framework
    • acrylic saddle areas
  54. Undercuts are located
    Right under the height of contour
  55. A chairside reline uses what type of acrylic
    cold cure and light cure
  56. A lab reline uses what type of acrylic
  57. What is tissue conditioning reline material used for
    • Often done first to heal tissue prior to an acrylic reline procedure
    • A person getting an immediate denture
    • medicated, very temporary medicament is placed in the denture over traumatized or recently surgerized tissue
    • Only last a month
  58. How long can a soft liner last for
    12-24 months
  59. epulis fissuratum
    overgrowth of tissue due to ill fitting dentures sitting on the musoca
  60. Repairing acrylic Prosthesis used _______ acrylic material as _____ to repair the fracture
    • chemical activated/cold cure
    • glue
  61. What are the steps to repairing Acrylic Prosthesis
    • 1.)Clean the surface – may have to grind as little
    • 2.)Apply monomer
    • 3.)Apply new acrylic material
    • 4.)Finish and polish
  62. Dentures should be out of the mouth for _____ hours daily and stored in ______
    • 8
    • water
Card Set:
Chapter 4 Acrylic resins
2018-01-17 14:10:38
Chapter Acrylic resins
Den materials
Chapter 4 Acrylic resins
Show Answers: