Old Exam Questions Flashcards
Which of the following are done last?
a) framework try in
b) create rests
c) CR record
d) altered cast
d) altered cast
How far distally should the denture base extend in a class 1 distal extension case?
2/3 of the retromolar pad
How far distally should the retention extend for a distal extension case?
Extends to 2/3 from the guide plate to 2/3 of the retromolar pad
Which of the following is the hardest to obtain with a distal extension case?
VDO record
What is the definition of a cast stop?
Essential to prevent displacement or deformation of the metal framework using resin-packing procedures
Wax patterns are made on the:
refractory cast
What is the definition of support for direct retainers?
Resist vertical movement toward the soft tissues
Which of the following is true?
a) the completed RPD must be passive
b) should not exert forces on the teeth or soft tissues
c) the tip of each retentive clasp should lie passively in a measured undercut
d) a&b
e) all of the above
e) all of the above
T/F: Class I lever is ideal. RPI is an example of a class I lever
False (both)
Wrought wire needs an elongation factor of:
more than 6%
What are the causes of cheek biting?
- lack of horizontal overlap
- mandibular teeth located too far buccal
Which of the following does not call for a rebase?
Dentition or moveable
anterior guidance means:
the anterior teeth disclude the posterior teeth when the mandible moves in protrusion
Which of the following are involved in SUPPORT?
a) rest
b) major connector
c) denture base
d) all of the above
d) all of the above
Which of the following is most commonly used to make denture bases?
PMMA
Which of the following is true above PIP?
a) PIP means pink indicating paste
b) should be put on cameo surfaces
c) should be put in great amounts
d) should be put on in brush strokes
d) should be put on in brush strokes
If clasps are tight on a class III with circumferential clasp, use what to adjust?
a) 139 pliers
b) hemostat
c) 200
d) remake
a) 139
The surveyor is used for:
a) undercuts
b) interferences
c) path of draw
d) all of the above
d) all of the above
If there isn’t a lot of interarch space, what is used for the denture base?
metal
T/F: All distal extension cases require clinical remount. All class III might require clinical remount.
First- true
Second-false
Chromium-Cobalt (Cr-Co) shrinks:
2.2-2.4%
Which occurs last?
a) altered cast technique
b) CR record
c) framework fabrication
d) rest created
a) altered cast technique
What do you need for a clinical remount?
Interocclusal record
Which of the following would NOT be an advantage of Chromium-Cobalt alloys?
a) low density (weight)
b) high modulus of elasticity (stiffness)
c) low material cost
d) resistance to tarnish
e) increased flexibility
e) increased flexibility
Kelly’s combination syndrome would present as all except:
a) lack of osseous tissue in the anterior maxilla
b) loose tissue in the posterior maxilla
c) intrusion of the mandibular anteriors
d) cystic palatine nerve
loos tissue in the posterior maxilla
Patients wearing a complete maxillary denture opposing a mandibular distal extension prosthesis:
Kelly’s combination syndrome
The characteristics associated with Kelly’s combination syndrome:
- bone loss in the pre-maxilla
- dropping of the posterior maxilla (tuberosities)
- extrusion of the lower anterior teeth
- posterior bone loss in mandible under RPD
- papillary hyperplasia of the maxilla
- decreased OVD
- facial asthetics often altered dramatically (cystic palatine nerve)
T/F: Guide plane should be 1/2 distance between cusp tips; Guide plane is as wide as rest:
True- both
T/F: Gingival margin to superior border of lingual bar is 3-4mm; Measure the distance on the cast.
First-true
Second-false (measurements should be taken in mouth)
Beaded border depth:
1 mm
If you have a large inoperable tori, you need to use:
horseshoe
I-bar with distal extension does NOT use:
DF undercut
Papillary hyperplasia is all EXCEPT:
Destructive bone disease
T/F: Cingulum rest is placed between incisal & middle 1/3 of incisors:
False
A positive rest is used for a cingulum rest is used because:
it prevents lateral movement
A surveyed crown is indicated when:
a) the survey line is in the gingival 1/3
b) no undercuts exist on abutment teeth
c) with the help of enameloplasty, one cannot have the changes necessary for the abutment teeth without cutting into the dentin
d) all of the above
d) all of the above
Indirect retainers have all of the following characteristics except:
A DO rest on the posterior abutment
Hyperplastic tissue should be removed prior to construction of your RPD to:
provide a firm stable base for the denture
Internal surface of RPD should be at:
90 degrees (butt joint)
Tooth contouring (i.e. survey lines) should be done ____ the surgery crown is made
before
Why do we tripodize the cast?
To be able to recreate the path of insertion
Gagging occurs due to:
a) decreased VDO
b) faulty impression
c) overextension
d) all of the above
d) all of the above
What gets removed during the altered cast technique?
distal extensions
You can determine if you need to reline if:
the indirect retainer doesn’t contact the tooth when you push on the distal extensions
