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no tissue stop
should not have a cast circumferential clasp anterior to the
fulcrum line
Space
ARTICULATOR (10) 28. The lingual bar major connector . A. Is too
thin B. Is too close to the free gingival margins of the teeth C.
Is too thick D. A & B
E. None of the above Answer = D; bar is too thin
buccal-lingually(bends) Needs to be 3-4 mm from the free gingival
margin 29. The framework exhibits which of the following? A. Proper
adaptation of the retentive clasp tip on tooth #22. B. A tissue
stop. C. Proper clasp design for tooth #29. D. None of the above.
Answer = d ; should not have a cast circumferential clasp anterior
to the fulcrum line no tissue stop space between 22& clasp tip.
30. The clasp utilized on tooth #29 . A. Is a cast circumferential
clasp B. Is a cast I-bar clasp C. Is a wrought wire circumferential
clasp Answer = a
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ARTICULATOR (11) 31. The occlusal plane is a. Located correctly,
to divide the interarch space. b. Too high c. Too low d. Set by
phonetics and esthetics, therefore, unable to determine if the
plane is correctly placed on mounted casts. Answer = b; set too
high for the retromolar pad mark. 32. On the patients right working
movement a. There is an interference between 28 & 5. b. There
is an interference between 29 &4. c. There is an interference
between 3& 30. d. There is an interference between 2 & 31.
Answer = C ; no picture 33. On the patients left working movement,
the right balancing contacts are a. 28 & 5. b. 29 &4 c.
3& 30 d. 2 & 31 e. none of the above. Answer = C ; no
picture
cusp tip is above the 1/2 mark for the retro molar pad
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ARTICULATOR (12) 34. Which of the following is true regarding a
Class IV partial denture. A. The retentive arms are usually wrought
wire unless the edentulous space is so large that the prosthesis is
considered an anterior denture base extension. B. The major
connector of choice in a maxillary class IV RPD is a palatal strap.
C. The retentive arm of choice for the embrasure clasp is an I-bar.
D. A rotational path partial design may be used. Answer = D; no
picture 35. The missing minor connector on this framework is: A.
acrylic resin retention loops B. cingulum rests C. lingual plate
Answer = a; acrylic retention mechanisms are minor connectors. 36.
When restoring this patient's occlusal scheme, A. The RPD should
not increase the patients occlusal vertical dimension. B. There
should be anterior denture tooth contact in centric relation. C.
You should use bilateral balanced articulation.
D. You may use porcelain teeth. Answer = A; when restoring with
RPDs without changing the vertical dimension, the natural teeth
must have the same contacts as without the partial otherwise the
vertical dimension would be changed. If only the Rpd is contacting,
the teeth and tissues under it will be sore.
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Articulator (13) 37. The occlusal scheme which best describes
this denture is: A. bilaterally balanced occlusion B. unilaterally
balanced occlusion C. monoplane occlusion D. canine guidance E.
none of the above Answer = D. the anterior teeth separate the
posterior teeth in lateral excursions. Not desireable for complete
dentures because it causes instabilty in lateral excursions. 38.
The maxillary posterior teeth appear to be . A. too long
occlusal-gingivally B. too short occlusal- gingivally C. positioned
too far palatally D. none of the above Answer = B. the occlusal
gingival length of the canine and premolars should be similar for
esthetics. 39. The correct occlusal scheme to utilize with these
denture teeth is . A. bilaterally balanced occlusion B.
unilaterally balanced occlusion C. anterior guidance D. none of the
above Answer = A Class I ridge relation, cusp teeth, large well
formed ridges, repeatable centric are the indications for cusp
teeth. This denture has 30 degree cusp teeth so they should be set
to bilateral balance.
contact of canines no contact posteriors
ugly
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ARTICULATOR (14) 40. The mesial-distal length of the denture
base acrylic resin minor connector on the patients left side should
be A. 2/3 to 1/2 the length of the residual ridge. B. extended to
the retromolar pad. C. 1/3 the length of the residual ridge. Answer
= A; the tissue stop should end to 2/3 the length of edentulous
ridge. If it is too long you will have to adjust the metal when
placing (difficult) easier to remove acrylic resin. 41. The
external finish lines on this framework . A. would allow for
acrylic to be mechanically retained in the framework. B. are
indistinct C. are too deep or over-contoured Answer = B; the
junction between metal and acrylic. The angle for acrylic should be
less than 90 degrees and have a mechanical undercut to retain the
acrylic. Remember that thin bevels of acrylic chip off. 42. The
superior border of this major connector . A. is not acceptably
adapted to the lingual surfaces of the anterior teeth B. is
correctly adapted to the lingual surfaces of the anterior teeth C.
is too low occlusal-gingivally Answer = a ; you need the lingual
plate to contact the lingual surfaces of the teeth in a scalloped
outline where the superior border covers the heights of the
cingulum then goes up to the interproximal contact.
too long
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ARTICULATOR (15) 43. An embrasure clasp should not be used in
what classification of removable partial denture? A. class I B.
class III C. class IV Answer = A; in a bilateral distal extension
partial you should not have a rigid clasp anterior to the fulcrum
line. This immediately disqualifies the embrasure clasp as an
option. This question is usually on removable tests. 44. Which of
the following is missing from the clasp on #29? A. minor connector
B. guide plane C. reciprocating arm D. retentive clasp arm E. rest
Answer = c -see picture. 45. The major connector in this case . A.
should cover and include prepared rest seats on teeth # 22 &
27. B. should be longer occlusal - gingivally. C. should be a
lingual bar. Answer = A; when designing partials you put a rest
next to the edentulous space and just covering the lingual of 22
& 27 is not enough. There needs to be prepared rest seats in
these teeth.
no reciprication
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ARTICULATOR (16) 46. According to the anatomic landmarks on the
cast, the maxillary anterior teeth in this denture are . A. too
large mesio - distally B. too small mesio - distally C. adequate
for this case D. placed too far lingually Answer = a ; if you
bisect the incisive papilla the line running through it will bisect
the middle of the canines.
47. On the patients right side, the posterior aspect of the
occlusal plane for these dentures is . A. too high B. too low C.
acceptable D. too narrow Answer = B. the teeth are set below the
retromolar pad marks. 48. What anatomical landmark, necessary for a
complete denture, is missing from the maxillary cast?
no pterygomaxillary notch
incisive papilla
A. fovea palatine B. incisive papilla C. 1 Pterygomaxillary
notch D. 2 tuberosities Answer = c; the maxillary cast must extend
back to the pterygomaxillary notch (bilaterally ) for adequate
retention.
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ARTICULATOR (17) 49. The RPD this case........ A. is missing an
indirect retainer. B. should have a prepared rest on #27 C. has
adequate external finish lines.
D. all of the above answer = D
50. The lingual bar major connector in this case should
a. directly contact the underlying soft tissues. B. have more
relief from the underlying soft tissues. C. engage soft tissue
undercuts if needed Answer = b. It should not directly rest on
lingual of the mandible because it will cause soreness. You can
directly lay on palatal tissues because they are highly keratinized
and slightly depressible (why you can bead a maxillary major
connector) 51. To reduce the movement of the denture base areas
away from the underlying soft tissues when chewing you should
........ A.prepare a cingulum rest on #27 and INCLUDE IT with the
lingual plate.
B.prepare a cingulum rest on #27 and change the major connector
to a lingual plate.
C.prepare a cingulum rest on #27 and extend the metal rest seat
area from #28 to include it. D.any of the above. Answer = D; For an
indirect retainer to function properly it must have a prepared rest
seat in the tooth to engage. Lingual coverage of anterior teeth
without a prepared rest seat does not constitute direct
retention.
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ARTICULATOR (18) 52. The major connector in this mandibular
Class I removable partial denture . A.has the correct thickness for
a lingual bar. B.is sufficient in distance from free gingival
margin. C.is missing an indirect retainer. D.all of the above.
Answer = C 53. The major connector in this mandibular Class I
removable partial denture is .
A.A lingual bar and its superior border is too close to the free
gingival margin.
B.A lingual bar and its superior border is placed correctly C.A
lingual bar and the placement of the superior border of the lingual
bar is of no importance to the soft tissues Answer = A 54. In this
Class I mandibular removable partial denture, rest preparations on
the cingulum of #22 & #27 . A. Would provide indirect retention
for the removable partial denture if included as part of the major
connector. B. Would provide direct retention for the removable
partial denture. C.Are not indicated in this case. Answer = A
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ARTICULATOR (19) 55. If the vertical space between the free
gingival margins and the functional position of the lingual frenum
were 4 mm, which major connector would be indicated? A. Lingual bar
B. Lingual plate C. Interrupted lingual plate
D. Labial bar Answer = B
56. If you were placing a circumferential C clasp #18 with a
retentive clasp arm on the distal-buccal of #18, the survey line on
tooth #18.............. A. Would be ideal as shown. B. Should be
located at the junction of the middle/gingival 1/3 of the tooth C.
should be located at occlusal 1/3 of tooth Answer = B 57. The guide
plane on the distal of tooth #29 is...
A. Too long occlusal-gingivally B. Sometimes used to engage
undercuts for retention C. Ideal for RPI clasps Answer = A
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ARTICULATOR (20) 58. The center of the incisive papilla is
marked on the denture. The position of the maxillary anterior teeth
would most likely result in. A. Lip incompetence because the teeth
are placed too far in a labial direction. B. Insufficient lip
support because the teeth are not far enough in a labial direction.
C. Whistling while pronouncing S sounds D. A and B Right
working
E. A and C Answer = E In general the average distance labial to
the incisive papilla is 8-12mm.
59. If the marks placed on the land of the mandibular cast
represent the center of the anterior edentulous ridge, then, which
of the following is true? A. The mandibular anterior flange is
correctly shaped. B. The mandibular anterior teeth are correctly
positioned. C. The mandibular anterior teeth are incorrectly
positioned. D. The position of the mandibular anterior teeth would
interfere with the patient's tongue.
Left working
E.C and D only
Answer = E 60. Which factors of the occlusion of the posterior
teeth are acceptably created in these complete dentures? A. The
balancing movements B. The working movements C. The protrusive
movements D. All of the movements E. None of the movements Answer =
E
protrusive