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dental careers ch51

Terms in this set (33)

procedure requiring a provisional prosthesis for a longer period of time?
implants or periodontal therapy
prefabricated temporary crowns
made of polycarbonate are used where appearance is important
the most common type of provisional coverage used for crown and bridge preparations
custom-made
the provisional should ______ below the margin of the preparation
not extend
the occlusal surface of the provisional coverage should be ____ the occlusal plane of the adjacent teeth
even with
one of the two most common materials used for custom provisional coverage
self-curing acrylic resin
final step after cementing the provisional coverage is
checking the occlusion
______ crowns are pre-formed crowns used for provisional coverage on anterior teeth, when appearance is important
polycarbonate
patient home-care instructions for someone with provisional coverage should instruct them to
pull floss through the contact, either to the facial or lingual side, once floss is placed below the contact
provisional crowns are commonly cemented with ____ cement
temporary
the purpose of provisional coverage is to
maintain function to the area of the mouth
the two types of provisional coverage include _____ and _____.
custom and prefabricated
a disadvantage of using custom provisional coverage is that
can be the most time-consuming to make
what is NOT true of prefabricated crowns
the crowns are available for bridges as well as for single units
the provisional that used a polymer shell filled with a hybrid composite resin that bonds with the pre-formed crown and too is a _____ crown
pre-formed polymer
stainless steel crowns are
commonly used for the primary teeth and used in cases where strength is essential
laboratory-fabricated coverage would be used when
several teeth have been prepared, such as in a multiunit bridge
the cervical margins of the provisional should have no more than ____ mm of space between the corn margin and the finish line of the preparation
0.5
when using a thermoplastic tray to fabricate a custom provisional, the tray is made
before the dentist prepares the teeth
advantages of using pre-formed crowns for provisional coverage include
reduces time required for the procedure and the pre-formed shell comes with anatomic features of natural teeth
pre-formed polycarbonate crowns
can be used as a mold to fabricate a custom provisional
when fabricating a provisional, undercuts on the proximal surfaces of adjacent teeth can cause ____ on the provisional
occlusal voids
home care instructions for a patient with provisional coverage should include
if the provisional should come off, contact the office immediately so it can be put back on
what should be done if the margins of the provisional are not adequate
additional material may be added at the inner aspect of the margin and then the provisional be reseated for setting
why is it necessary to keep the preliminary alginate impression moist
to keep the alginate from distorting
if the liquid/powder acrylic material is being used for the provisional, how many drops of liquid are used
10
the usual set time for the mixed acrylic before placement into the mouth
1-2 mins
once the acrylic-loaded impression is on the prepared tooth, it should remain on the tooth for approximately how long
3 mins
why is the provisional placed on the tooth in the patients mouth for the final curing stage
to avoid excess shrinkage of the provisional during the final curing stage
the provisional is trimmed to within ____mm of the gingival shoulder of the prepared tooth
1
the using a pre-formed provisional crown, the crown is tried on for shape and size ____- the tooth is prepared
after
the setting time for the resin placed in a pre-formed crown is approximately _____ seconds
90
indications for provisional coverage include
maintaining the function of the prepared tooth, preventing shifting or opposing teeth, and keeping the patient comfortable while the prosthesis is being made
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