Mod E Unit 4 Theory Exam A

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Mod E Unit 4 Theory Exam A
2012-11-18 22:37:09
Mod Unit Theory Exam

Mod E Unit 4 Theory Exam A
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  1. A _____ is classified as a type I dental cement and acts as an adhesive to hold together the indirect restoration and the tooth surface.
    b) luting cement
  2. The "Guidelines for Mixing Dental Cements" tell you to:
    b) dispense the powder first, and then the liquid
  3. Which of the following cement types is/are the most versatile and the least irritating to the pulp?
    d) both a and b - ZOE cement and Composite Resin cement
  4. When dispensing most cement, generally the powder should be ____ before dispensing.
    d) both b and c - fluffed and measured
  5. Which cement inhibits recurrent decay?
    b) Glass ionomer
  6. Which is not true of the preparing the tooth for a composite resin cementation?
    d) dry the tooth completely
  7. What are preliminary impressions used to make?
    d) all of the above - diagnositc models, provisional coverage, orthodontic appliances
  8. Impression trays must be rigid enough to:
    a) support the material in the patients mouth
  9. What are the three curing stages?
    b) initial set, final set, final cure
  10. When taking a wax bite registration, the patient is directed to do what?
    b) close normally and gently
  11. What may be the result of alginate material not setting or setting too rapidly?
    d) all of the above - expired shelf life, humidity, improper storage
  12. _____ wax is preformed with a thin sheet of aluminum foil between the layers.
    d) bite registration
  13. What is the first step to making a custom tray?
    c) prepare a diagnostic model
  14. Which type of resin is formed into a diagnostic model using heat and a vacuum?
    c) thermoplastic
  15. Plaster mix should not be:
    c) completed in 30 seconds
  16. Air bubbles in a stone cast are caused by:
    d) improper pouring of the impression
  17. What is a Maryland Bridge help in place by?
    b) wing-like extensions bonded onto the lingual surfaces of the adjacent teeth
  18. Which of the following should be included on the laboratory prescription:
    d) all of the above - dentists name, license number, address, signature, type of prosthesis requested, date when the case is expected back
  19. What device is used to determine the tooth color for ceramic crowns or bridges?
    c) shade guide
  20. What is the purpose of a core buildup?
    c) both a and b - to support the cast crown and to provide a larger area of surface retention for cementation
  21. Which statement is true of packing retention cord?
    d) all of the above - it is important to place the retraction cord into the sulcus without damaging the surrounding gingival tissues; the placement and removal of gingival retraction cord are expanded functions and may be performed by a dental assistant trained in expanded functions; generally, the operator removes the cord while the assistant prepares the impression material.
  22. In general, the purposes of provisional coverage are to:
    d) all of the above - maintain and/or restore tooth function; provide comfort for the patient while the permanent restoration is being fabricated; protect the margins of the prepared tooth
  23. When using a thermoplastic tray to fabricate a custom provisional, the tray is made:
    a) before the dentist prepares the tooth
  24. The provisional is trimmed to within __mm of the gingival shoulder of the prepared tooth.
    a) 1
  25. When using a pre-formed provisional crown, the crown is tried on for shape and size _____ the tooth is prepared.
    a) after
  26. The setting time for the resin placed in a pre-formed crown is appriximately ___ seconds.
    d) 90 
  27. What is the removable prosthesis that replaces all of the teeth on one dental arch?
    b) removable full denture
  28. Which of the following choices is an extraoral factor that must be considered before recommending a removable prosthesis for a patient?
    a) dietary habits
  29. What does a removable partial denture receive its support from?
    d) both a and c - underlying tissues and remaining teeth
  30. The ____ is not a component of a partial denture.
    a) post dam
  31. The artificial teeth are set in wax for the patient and the dentist to evaluate at the ____ appointment.
    c) try in
  32. Retention of a maxillary denture depends on the suction seal known as the:
    c) post dam
  33. During fabrication of a complete denture, the dentist uses the baseplate wax-occlusal rim assembly in order to evaluate the ____, which includes centric, protrusive, retrusive, and lateral excursions.
    b) occlusal relationship
  34. A(n) is placed immediately after the extraction of the patient's remaining anterior teeth and must be replaced or relined in 3 to 6 months.
    b) immediate denture
  35. ____ is accompanied by placing a new layer of denture resin over the tissue surface of the appliance.
    a) relining
  36. Simple repairs of broken denture acrylic are sometimes handled in the dental office laboratory by using:
    b) cold-cured acrylics
  37. Approximately how many appointments are needed to fabricare a partial denture?
    d) five
  38. Home care for the partial denture include:
    a) storing the partial denture in water or in a moist, airtight container while not wearing it.
  39. A properly placed dental implant has a success rate of more than __%.
    a) 90
  40. Dental Implants:
    c)  can prevent the bone loss and gum recession that often accompany bridgework and dentures
  41. The ideal candidate for dental implants meets which of the following criteria?
    d) both a and b - has good stable health and adequate alveolar bone; is willing to commit to conscientious oral hygiene and regular dental visits.
  42. Extraoral radiographs, which are needed to evaluate the height, width, and quality of bone, include which of the following views"
  43. What is the process by which the living jawbone naturally grows around the dental implant?
    d) osseointegration
  44. The entire endosteal implant process may take ____ to reach completion.
    c) three to nine months
  45. A surgical stent:
    a) will be used as a guide that is positioned over the alveolar ridge to guide placement of the implant screws in their proper position.
  46. Which of the following represents the correct sequence for implant placement from start to finish?
    c) 1,3,2 
  47. Implants are frequently made from titanium, either by itself or coated with:
    b) hydroxyapatite
  48. Which of the following statements is true of the formation of dental plaque and calculus on implants?
    d) both dental plaque and calculus can form on dental implants.
  49. The implant that is most commonly used to support a mandibular complete denture is the ____ implant.
    c) subperiosteal
  50. During the first surgery for a subperiosteal implant, the alveolar ridge is exposed and:
    b) an impression is taken of the alveolar ridge