DS4101: Prosthodontics UPDATED Exam Questions and CORRECT Answers
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Course
DS4101
Institution
DS4101
DS4101: Prosthodontics UPDATED Exam
Questions and CORRECT Answers
Define Kennedy Classes I - IV - CORRECT ANSWERExtra rules for Kennedy Classes? - CORRECT ANSWER- Classification should follow
rather than precede any exos of teeth that might alter the original classification
If third molar mi...
DS4101: Prosthodontics UPDATED Exam
Questions and CORRECT Answers
Define Kennedy Classes I - IV - CORRECT ANSWER-
Extra rules for Kennedy Classes? - CORRECT ANSWER- Classification should follow
rather than precede any exos of teeth that might alter the original classification
If third molar missing and not to be replaced, it is not considered in classification
If third molar present and to be used as abutment, considered in classification
If second molar missing, not to be replaced, not considered in classification (e.g. if opposing
second molar is likewise missing and is not to be replaced)
Most post edentulous area (or areas) always determines classification
Edentulous areas other than those that determine classification referred to as modifications,
designated by number
Extent of modifications not considered, only number of additional edentulous areas
No modifications areas can be included in class IV arches
What are the 7 components of a typical RPD? - CORRECT ANSWER- 1. major connector
CLASP ASSEMBLY
2. minor connector
3. rests
4. retentive arms
5. reciprocal arms
6. indirect
7. base and teeth
What are the requirements for major connectors? - CORRECT ANSWER- - rigidity and
provide cross-arch stability and force distribution
,- Do not interfere with or irritate tongue
- Not substantially alter natural contour of lingual surface of md arch or palatal vault
- Cover no more tissue than is absolutely necessary
- Do not compromise gingival margins - issue with new thermosens - tissue borne
- Do not contribute to food trapping - sometimes an issue with inclined teeth
- Made from compatible allow (gold is best material - certain amount of malleability)
What are some design guidelines for major connectors? - CORRECT ANSWER- - Free from
movable tissue
- Avoid impingement of gingival tissue
- Bony and soft tissue prominence avoided if possible, appropriate relief made
- In mx, border of major connector at least 6mm from free gingival margin
- In md, border of major connector at least 3mm from free gingival margin
- Borders should run parallel to gingival margins of remaining teeth
- If gingival margins must be crossed, crossed at right angles to minimize coverage of
marginal tissues
- Anterior border of mx major connector should terminate on posterior slope of prominent
rugae
- Make major connector as symmetrical as possible
What types of mandibular major connectors are available? - CORRECT ANSWER- Lingual
bar
Lingual plate
Sublingual bar
Lingual bar w/ continuous cingulum bar
Cingulum bar
Labial bar
When should you use a lingual bar and when should you use a lingual plate? - CORRECT
ANSWER- - If enough space - lingual bar (8mm) otherwise, lingual plate
- Depends on number and prognosis of remaining teeth
, lingual plate features? - CORRECT ANSWER- - Superior border knife edge and contoured to
intimately contact lingual surface above the cingulum
- Closes interprox space to level of contact points
- When diastema exists interrupted lingual plate for aesthetics
- Should end just below the contact points
What are the different types of maxillary major connectors? - CORRECT ANSWER- Palatal
strap
Anterior-posterior palatal strap
Palatal plate
U-shaped plate (horse shoe plate)
Palatal bar
Anterior-posterior bar
What are minor connectors? - CORRECT ANSWER- small bits that attach clasps to the rest
of the framework - includes saddles
What types of minor connectors are there? - CORRECT ANSWER- Proximal plate (broad
contact - antirotation properties)
embrasure minor connectors
- triangular cross section, join major connector at right angles
saddle - mesh and lattice types
What are the benefits of having a lingually shifted proximal plate? - CORRECT ANSWER- -
increase rigidity
- enhance reciprocation
- improve aesthetics
how much relief is required for acrylic? - CORRECT ANSWER- 1mm to allow space for
resin acrylic however should only begin 1.5-2mm from the abutment teeth (so there is some
metal-tissue contact)
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