Dental Materials Final

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Grctiff
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53224
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Dental Materials Final
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2010-12-04 11:23:26
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Dental Materials Final
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  1. What are the uses of dental waxes?
    boxing impression, bite registration, making of die, hold things together
  2. What is the composition of waxes?
    Natural (plants, insects, minerals), synthetic (oils and fats)
  3. What is melting range?
    temperature at which each component of wax will soften and flow
  4. What is flow?
    Wax moves over on material
  5. What is the classification of waxes?
    Pattern, processing, impression
  6. What is pattern wax?
    inlay, casting, base plate
  7. what is processing waxes?
    boxing, utility, sticky
  8. What is impression waxs?
    corrective, bite registration
  9. What is the use of Impression Material?
    Reproduce oral cavity and hard/soft tissue
  10. What are the classification of Impression Materials?
    Elastic, Rigid
  11. What are the classifications of Elastic Impression?
    Irreversible, Reversible
  12. What are the different types of Impression Trays?
    Quadrant, mesh, metal, plastic, water cooled, custom
  13. What is a negative impression?
    The original impression
  14. What is a positive impression?
    stone poured impression
  15. What is a cast/model?
    stone
  16. What is a die?
    Single tooth crown
  17. Polyvinle
    • -Irreversible
    • -Hydrophilic
    • -Things Needed: impression tray, delivery system
    • -Insert it into delivery system
    • -Brand Name: Express
    • - no pouring, storeing it doesnt matter
  18. Rubber Base (Polysulfide)
    • -Irreversible
    • -Hydrophobic
    • -Composition: Polysulfide = dentures
    • -Things Needed: custom tray, diamond head spatila, onion pad, tongue blade
    • -Manipulation: insert in tray and place in mouth. injection is crown and bridge
    • -Brand Name: Rubber Base
  19. Alginate
    • -Irreversible
    • -Hydrophilic
    • -Composition: agar (sea weed), potatsium sulfate
    • -Things Needed: metal tray, beaver tail, rubber powder, water, vile, bowl
    • -Manipulation: powder into liqud
    • -Brand Name: Gel Trate
  20. Hydrocolloid (Agarloid)
    • -Reversible
    • -Hydrophobic
    • -composition: agar, borax, potassium
    • - things needed: unit, 18 gauge needed
    • -name of unit: Hydrocolloid Conditioning Unit
  21. Baths/Times/ Temps of Hydrocolloid
    • 1. liquifing 212 degrees
    • 2. storing 150 degrees
    • 3. tempory 110-115 degrees
  22. What tray is needed for Hydrocolloid?
    Water cooled Rimlock
  23. What are the phases of Material?
    Sol, Gel, sol
  24. Rigid Impression Material
    • -Composition: thermal plastic
    • -uses: hold things together, bite registration, die
    • -how material comes supplied: cake, compoud (stick)
    • -can be softened by flame or hot water
  25. What is Gypsum?
    made from anything from Earth (rock,stone)
  26. What is the Chemical Properties of Dihydrate?
    CAS04-2H20
  27. What is the chemical property of hemihydrate?
    CAS04-1/2H20
  28. What are the classifications of gypsum products?
    impreesion plaster, model plaster, dental stone, high strength, high expansion
  29. What is the manipulation of gypsum products?
    powder into liquid with a specific bowl
  30. What is the setting order?
    inital, final, working
  31. What are the methods of pouring casts?
    double, single, boxing
  32. What does reversible mean?
    can go back to original state
  33. what does irreversible mean?
    cant take material back to original state
  34. what does elastic mean?
    will flow easier and does pick up undercuts
  35. What does rigid mean?
    doesnt pick up undercuts
  36. What does hydrophilic?
    Does not mind water
  37. What does Hydrophobic mean?
    Does not like water
  38. What is the size of Maxiallary trays?
    1-5 (one being the largest)
  39. What is the size of Mandibular trays?
    20-25 (20 being the largest)
  40. What tray does Poly Sulfide use?
    Custom
  41. What tray does Poly Vinyl use?
    stock, disposable, tri-tray
  42. What kind of tray does Alginate use?
    metal, disposable, stock
  43. What is the purpose of sealants?
    to seal non carrious pits and fissures for primary and permanent teeth. prevents cavities and dental decay
  44. What is polymerization?
    the way the chemican sets
  45. What is light activated?
    light cured- 1 component apply to tooth and activate by light
  46. What is Chemical activated?
    self cure- usually 2 compnents and room light
  47. what is the composition of sealants?
    bis-GMA, UDMA
  48. What is the working time of sealants?
    • self cure- 2 minutes
    • light cure- 20 seconds
  49. What is the placement order of sealants?
    • 1. throughly clean the surface of tooth with non floralated tooth (pummus)
    • 2. rings tooth, clean pummus off
    • 3. dry tooth
    • 4. apply acid edjent material for 60 seconds.
    • 5. rinse tooth
    • 6. throughly dry tooth
    • 7. apply sealant material
    • 8. cure
    • 9. check occlusal portion of tooth
  50. What are the types of sport mouth guards?
    stock, boil and bite, custom made
  51. What gage of material do you use for sporth mouth guards?
    .080
  52. What is the procedure for fabriciation for sport mouth guards?
    taking alginate impression, pour stone case, fabricate for mouth guard
  53. What are the different types of material bite guards come in?
    hard arycllic, hard/soft lamenents, and thermal plastic sheets
  54. What is the procedure for fabrication of bite guards?
    take alginate impression, pour stone cast, but must be sent to lab for fabriciation because the matieral is so hard.
  55. how do bleaching trays work?
    Whitents teeth, 97& of enamel is minders, proxides or non-proxides agents
  56. What are the types of stains?
    hydrogen proxide, carbon proxide, non hydrogen proxide systems, urea peroxide
  57. True/False. Stains that are yellow/brown are easier to bleach then blue/gray or black stains.
    True
  58. What are the types of bleaching procedures?
    home bleaching, in-office, non vitle teeth
  59. What is home bleaching?
    10-22% carbon peroxide with a custom tray, wear 30 minutes twice a day
  60. What is in office bleaching?
    45 minutes to an hour. 35% carbonbind peroxide with high intensity light-light causes sensitivity
  61. What is non vitle teeth bleaching?
    teeth w/ root canal- toothe must be opened again and solution goes in it to lighten it back up
  62. What are the steps in fabrication of bleaching trays?
    • 1. take good impression
    • 2. pour in stone (microstone)
    • 3. place seperating medium on teeth called Block Out
    • 4. fabricate a mouth protector
  63. What size material do you use for bleaching trays?
    .040
  64. What are the classifications of restorative materials?
    intermediate, temporary, permanent
  65. What does intermediate mean?
    between restoration and tooth
  66. What does temporary mean?
    short duration
  67. What does permanent mean?
    long duration
  68. Zoe B&T
    • - comes in powder and liquid
    • -manipulate by 1:1 powder into liqud
    • - uses: sedative base,, thermal instilator on top of base b/c it prevents sensitivity
  69. IRM
    • comes powder and liquid.
    • composition: powder (zinx oxide) liquid (uginal)
    • 1:2(drops)
    • uses: temporary restoration
  70. Temp Bond
    • comes: congel
    • compostion: congel form has catalyst and base
    • uses: temporary cement, creamy consistincy
    • only one that acts as a cement
  71. What is Alloy?
    mixture of two or more metals
  72. What is Amalgam?
    restorative material that is composed of silver based alloy mixed with mercury
  73. What is the composition of amalgam?
    • 40-50%= silver content(strength)
    • 12-30%= tin(physical properties)
    • 10-30%=copper(hardness)
    • 0-2%=oxidation
  74. Safe lever in 40 hr work week:known as the threshold limit value (TLV):
    0.005 mg/m3
  75. Equipment used to mix amalgam is called an:
    Amalgumator
  76. The act of mixing amalgam is called:
    turoration
  77. What are the types of mixes for amalgam?
    • under triturated (dry and crumbly)
    • properly triturated (satin like)
    • over mixed(to wet)
  78. What is bringing to a uniform mass mean?
    mulling
  79. How does amalgam come supplied?
    powder, tablet, prepackaged
  80. What are the spills for amalgam?
    • single spill=400mg
    • 2 spill=600 mg
    • 3 spill= 800mg
  81. What is the ratio for Ketac Bond?
    1:1
  82. What is the ratio for Bitrebond?
    1:1
  83. Resin Base
    • Brand Name: Maxem
    • Supplied: single system, syringe
    • composition: resin base (fluorides)
    • manipulated: put plunger, push, mixes
  84. Glassionomers
    • auto cured
    • brand name: Keytascem
    • supplied: powder/liquid, capsul
    • compostion: varies
    • manipulated:1:3(drops) bring in my 1/3
  85. Fugi
    • supplied: powder/liquid, capsule, clicker
    • manipulated:1:2(drops) bring in my 1/2
    • *mix on glossy pad with certain spatula
  86. Relie X
    • Brand name:Vitremere
    • light senstitive
    • manipulated: 2:2
  87. Zinx Poly
    • Brand name: durelon
    • supplied: powder/liquid and syringe
    • composition: zinx oxide(pwdr) poly arclyic acid w/ h20 co-palmer(liquid)
    • 1:1 cal
  88. Zinc Phosphate
    • supplied:powder/liquid
    • composition: zinc oxide(pwdr) phosphoric acid (liquid)
    • manipulated: 1mound:8(drops)
  89. What are the classifications of gold?
    biocapability, solders, metals used in ortho, implant materials
  90. what does Pt stand for?
    platinum
  91. what does Pd stand for?
    pladiu,
  92. what are primary base metals?
    copper, nickel, silver, zinc, tin, titanium
  93. What is more compatable with oral tissue but tend to corrode?
    Nobile metals (biocapatibility)
  94. Women have allergies to what 10:1 over men?
    Nickel
  95. What are the base metals added to nickel chromal alloys?
    Beryllium (biocapatibility)
  96. What is an alloy used to join metals together?
    solders
  97. What are formed after a metal cast has been made - bendable to desired shape - partials?
    wrought metals
  98. What reacts with inorganic filler organic matric which causes the materials to adhere to each other?
    silane coupling agent
  99. What is the measurment of gold content?
    Karat
  100. What is the percent of gold times 10?
    fineness
  101. What are symetrical to the midline?
    anterior borders
  102. What are parallel to the buccal surface of the posterior teeth?
    Lateral borders
  103. What are parallel to the opposite cuspid?
    Posterior Corneres
  104. What are square with the midline?
    Posterior Borders
  105. What are the parts of the Model Trimmer?
    Grinding wheel, casing, platform

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