Dental Materials

  1. When is a provisional tooth used for esthetics?
    in the anterior teeth
  2. When a tooth is pressped for a crown it is cut down and is left wethout occlusal/incisal and proximal contact, this cal allow for what to happen in just days?
    tooth migration
  3. If the provisional that is made to maintain tooth position while the pt is waiting to get their crown what might happen?
    occlusal trauma
  4. If the provisional doesn't contact adjacent teeth what might occur?
    gingival irritation
  5. in regards to provisionals, overcontoured= _________________, undercontoured = _________________.
    • overcontoured: not allow for self cleansing
    • undercontoured: force food into gingiva
  6. A well ___________ provisional with ________ margins will protect from marginal ____________ and marginal _____________ of bacteria and oral fluids
    • adapted
    • good
    • fracture
    • leakage: microleakage
  7. Most crown preps extend below the gingival margin, periodontal tissues are susceptible to irritation from what 3 different types of provisional margins?
    What could this type of irritation lead to?
    • over contoured
    • over extended
    • over hanging
    • Irritation could lead to: gingival recession
  8. List 6 situations/circumstances in which a provisional restoration would be used.
    • endodontic access preparation
    • vitality of the tooth is in question
    • emergency care
    • awaiting permanent restoration
    • restoration of implants
    • restoration of primary teeth
  9. How long are provisional restorations recommended to last?
    for only 2-3 weeks: must have adequate strength to last that long
  10. List 5 different provisional materials. Which of these is limited to intracoronal placement only?
    • metals
    • polycarbonates
    • acrylics
    • composites
    • cement: intracoronal only
  11. List 4 different types of preformed provisional crowns. WHich of these is the most durable? And which is used most often for pedo? And which is most esthetic?
    • stainless steel: most durable; and most used in pedo
    • aluminum
    • polycarbonate: most esthetic
    • celluloid
  12. Which type of provisional crowns are time saving and used for a single tooth only?
    preformed crowns
  13. preformed crowns may require considerable adjustments to fit properly on the tooth, this includes what procedure?
    Stainless steel crowns: crimped and contoured at contacts and margins with contouring pliers
  14. preformed crowns usually require a reline of acrylic or composite, especially which 2 types of preformed crowns?
    • celluloid
    • polycarbonate
  15. Which type of provisional crowns are more successful, fabricated by direct or indirect techniqe, have superior esthetics, and are great for multi-unit temporary bridges?
    customized provisionals
  16. what is the most common choice for customized multi-unit and indirect provisional template material?
    vacuum formed plastic
  17. Which customized provisional technique includes using a template of the tooth taken before the prep, the template is then filled with provisional material then inserted back into the mouth?
    direct technique
  18. Which customized provisional technique is fabricated on a stone model, uses a template of the pre-prepped tooth, allows for longer working time and convenient and is more time consuming?
    indirect technique
  19. List 3 advantages of using acrylic provisional material. List 3 major patient complaints of using provisional material
    • Advantages:
    • good esthetics
    • ease of use
    • low cost
    • Pt complaint:
    • heat release
    • high shrinkage
    • odor
  20. What type of provisional material was made to offset the disadvantages of acrylics including low shrinkage and heat release during curing? What are 3 advantages of these types of provisional materials?
    • composite
    • Advantages: good strength, less wear, and biocompatible
  21. What type of provisionals are used for less extensive coverage such as endodontic procedures or inlays? What material is most often used for this and why?
    • intracoronal cement materials
    • zinc oxide eugenol: it is palliative to sensitivity or trauma
  22. How come zinc oxide eugenol should NOT be used as an intracoronal cement material if the final restoration will be bonded with RESIN cement?
    because eugenol inhibits the set of resins
  23. List 3 esthetic limitations about provisionals to inform the pt of.
    • imperfec color
    • anatomic contours
    • smoothness is poor
  24. What are eating instructions to give to the pt in regards to provisional restorations?
    • do not eat sticky or hard food in that area
    • if it falls off reseat with denture adhesive until they can make it to the dentist
  25. What are oral hygiene instructions to give the pt in regards to provisional restorations?
    pull floss THROUGH contact, not up and out
Card Set
Dental Materials
week thirteen