The definition of a combination case involves:
a.
fixed and removable restorations that compliment each other
b.
fixed and removable restorations on the same arch
c.
full or partial dentures in combination with opposing with fixed restorations
d.
both a an b
Which of the following is NOT true about combination cases:
a.
while covered in depth in most dental schools, they are infrequently encountered in actual practice
b.
for best results, fixed crown and bridges and partials should be fabricated at the same time
c.
both a and b
d.
none of the above
After evaluation and design using preliminary models, the first step in a combination case is to:
a.
block out edentulous areas with rope wax
b.
prepare and impress the teeth that shall receive the crown and bridge work
c.
both a and b
d.
none of the above
A pick-up impression:
a.
is sent to the lab to fabricate a partial denture
b.
is required prior to the fabrication of crown and bridge restorations
c.
will seldom be necessary when all of the proper steps are followed
d.
none of the above
Partial dentures are an important part of what can be offered to dental patients because:
a.
turn of the century dental patients had fewer teeth to work with than average older patients today
b.
they may be a more economical restorative option
c.
periodontally involved teeth may not be strong enough to be bridge abutments
d.
all of the above
If a person is missing his or her anterior teeth:
a.
a partial denture may be used instead of crown and bridge or implants
b.
a partial denture may be used as an interim therapy
c.
both a and b
d.
none of the above
When demonstrating the use of a monophase impression material:
a.
it was noted that no syringing is necessary for a pick-up impression
b.
it was recommended because it will not push tissue out of the way
c.
it was chosen because ease of removal was an important consideration
d.
all of the above
When taking the impression, it was suggested that:
a.
a double-arch tray should never be used for a combination case or a bridge
b.
crowns with attachments cannot be fabricated on a quadrant impression
c.
both a and b
d.
none of the above
Which of the following is NOT true regarding clinically-prepared rests:
a.
use a round bur to eliminate undercut and path of insertion problems
b.
the use of a small inlay bur with a modified shoulder was suggested
c.
rest preps should be deep enough that metal rests do not effect occlusion
d.
undercuts are to be avoided
Referring to the first combo case (upper esthetic and lower conventional partials):
a.
the upper anterior crowns were cemented when the finished partial was delivered
b.
a vertical space of 5-6 mm between opposing arches is required for VKS attachments
c.
no crowns were required for the lower
d.
all of the above
Given the choice, patients may wish to consider that:
a.
the way people smile, an esthetic partial is more important for a lower arch than an upper
b.
the clasps of a conventional partial are not as noticeable on the lower arch
c.
Akers and Roach clasps are common examples of esthetic attachments
d.
all of the above
When demonstrating the cementing of crowns in the first combo case:
a.
the preps were first cleaned with a disinfectant before being dried with a cotton roll
b.
obtaining bone-dry preps was not required when using a resin-reinforced glass ionomer
c.
the cement was cleaned up with the esthetic partial in place
d.
all of the above
When analyzing impression problems, it was NOT true that:
a.
a failed pick-up impression on a non-retentive partial was discussed
b.
inaccuracies were caused by the use of stock plastic trays and stiff or unsuitable impression materials
c.
the use of a “mush bite” was recommended for recording occlusal relationships
d.
where an attachment is to be used, at least 5 mm of vertical dimension is needed
Referring to the second combo case (upper and lower partials without attachments):
a.
the design of the case included a laboratory-prepared rest on a four-unit PFM anterior bridge
b.
a design survey of diagnostic models was shown
c.
design pre-approval using e-mailed occlusal, facial and lateral views of upper and lower models
d.
all of the above
An adaptation pattern relates to:
a.
the use of radiographs to consider the bony support for possible clasp teeth when designing a partial
b.
a method of support using interproximal preparations for occlusal and buccal/lingual rests
c.
the fabrication of a PFM crown under an existing partial clasp
d.
none of the above
In questions 16-20 about the last combo case (upper and lower partials, four teeth on upper arch):
a.
the use of implants to eliminate the need for visible metal clasps was shown
b.
VKS attachments were not used due to space constraints
c.
a cross-arch Roach ball attachment between two of four splinted crowns was shown
d.
none of the above
For the last combo case, it is NOT true that:
a.
both VKS attachments and laboratory-prepared rests were used to retain the lower partial
b.
a popular I-bar clasp on the facial of the lower partial was required for retention
c.
although a complicated case, no visible metal was required for the upper or lower partials
d.
the lab uses models to determine if there will be enough vertical space for attachments
Regarding the taking of a bite of the remaining teeth and the residual ridges, it was noted that:
a.
“mush” bites should be taken by having patients slowly bite down onto a VPS impression material
b.
the use of upper and lower bite rims was demonstrated and suggested
c.
both a and b
d.
none of the above are true
For the pick-up impression:
a.
upper splinted crowns were cemented with temporary cement or Duralon with Vaseline added
b.
a custom tray was shown and recommended
c.
use of a heavy body impression material was not recommended
d.
all of the above
For the try-in of the upper and lower partials:
a.
the second appointment included the try-in of the upper framework with a wax rim
b.
the PFM crowns were permanently cemented at the third and final appointment
c.
both a and b
d.
none of the above
