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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
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The "Guidelines for Mixing Dental Cements" tell you to:
b) dispense the powder first, and then the liquid
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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
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When dispensing most cement, generally the powder should be ____ before dispensing.
d) both b and c - fluffed and measured
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Which cement inhibits recurrent decay?
b) Glass ionomer
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Which is not true of the preparing the tooth for a composite resin cementation?
d) dry the tooth completely
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What are preliminary impressions used to make?
d) all of the above - diagnositc models, provisional coverage, orthodontic appliances
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Impression trays must be rigid enough to:
a) support the material in the patients mouth
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What are the three curing stages?
b) initial set, final set, final cure
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When taking a wax bite registration, the patient is directed to do what?
b) close normally and gently
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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
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_____ wax is preformed with a thin sheet of aluminum foil between the layers.
d) bite registration
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What is the first step to making a custom tray?
c) prepare a diagnostic model
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Which type of resin is formed into a diagnostic model using heat and a vacuum?
c) thermoplastic
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Plaster mix should not be:
c) completed in 30 seconds
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Air bubbles in a stone cast are caused by:
d) improper pouring of the impression
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What is a Maryland Bridge help in place by?
b) wing-like extensions bonded onto the lingual surfaces of the adjacent teeth
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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
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What device is used to determine the tooth color for ceramic crowns or bridges?
c) shade guide
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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
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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.
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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
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When using a thermoplastic tray to fabricate a custom provisional, the tray is made:
a) before the dentist prepares the tooth
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The provisional is trimmed to within __mm of the gingival shoulder of the prepared tooth.
a) 1
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When using a pre-formed provisional crown, the crown is tried on for shape and size _____ the tooth is prepared.
a) after
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The setting time for the resin placed in a pre-formed crown is appriximately ___ seconds.
d) 90
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What is the removable prosthesis that replaces all of the teeth on one dental arch?
b) removable full denture
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Which of the following choices is an extraoral factor that must be considered before recommending a removable prosthesis for a patient?
a) dietary habits
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What does a removable partial denture receive its support from?
d) both a and c - underlying tissues and remaining teeth
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The ____ is not a component of a partial denture.
a) post dam
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The artificial teeth are set in wax for the patient and the dentist to evaluate at the ____ appointment.
c) try in
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Retention of a maxillary denture depends on the suction seal known as the:
c) post dam
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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
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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
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____ is accompanied by placing a new layer of denture resin over the tissue surface of the appliance.
a) relining
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Simple repairs of broken denture acrylic are sometimes handled in the dental office laboratory by using:
b) cold-cured acrylics
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Approximately how many appointments are needed to fabricare a partial denture?
d) five
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Home care for the partial denture include:
a) storing the partial denture in water or in a moist, airtight container while not wearing it.
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A properly placed dental implant has a success rate of more than __%.
a) 90
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Dental Implants:
c) can prevent the bone loss and gum recession that often accompany bridgework and dentures
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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.
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Extraoral radiographs, which are needed to evaluate the height, width, and quality of bone, include which of the following views"
Tomogrpahic
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What is the process by which the living jawbone naturally grows around the dental implant?
d) osseointegration
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The entire endosteal implant process may take ____ to reach completion.
c) three to nine months
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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.
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Which of the following represents the correct sequence for implant placement from start to finish?
c) 1,3,2
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Implants are frequently made from titanium, either by itself or coated with:
b) hydroxyapatite
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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.
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The implant that is most commonly used to support a mandibular complete denture is the ____ implant.
c) subperiosteal
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During the first surgery for a subperiosteal implant, the alveolar ridge is exposed and:
b) an impression is taken of the alveolar ridge
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