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 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 during resin-packing procedures
Wax patterns are made on the:
refractory cast
What is the definition of support for direct retainers?
resists 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
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 locate too far bucal
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 about 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 the clasps are tight on a class III with circumferential clasp you use what to adjust?
a- 139 pliers
b- hemostat
c- 200
d- remake
139 pliers
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 isnt a lot of inter arch 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 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 CrCo alloys?
a- low density (weight)
b- high modulus of elasticity (stiffness)
c- low material cost
d- resistance to tarnish
e- increased flexibility
e- increased flexibilty
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
b- loose tissue in the posterior maxilla
T/F: Guide plane should be 1/2 distance between cusp tips; guide plane is as wide as rest
Both true
T/F: Gingival margin to superior border of lingual bar is 3-4 mm. Measure the distance on the cast.
First true. Second false
Beaded border depth is:
1mm
If you have 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 and middle one third of incisors
False
A positive rest for a cingulum rest is used because:
it prevents lateral movement
A surveyed crown is indicated when:
a- the surveyed 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 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 (survey lines) should be done ____ the survey crown is made
before
Why do we tripod the cast?
to be able to recreate the path of inserton
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 a reline if:
the indirect retainer doesn’t contact the tooth when you push on the distal extensions
