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RPD > FRAMEWORK TRY-IN > Flashcards

FRAMEWORK TRY-IN Flashcards

1
Q

trips for the framework try in (3)

A

-the completed rpd must be passive
-should not exert forces on the teeth or soft tissues
-the tip of each retentive clasp should lie passively in a measured undercut

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2
Q

a — time between the impression and framework try in is desirable

A

short

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3
Q

allow adequate time for

A

appointment

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4
Q

PRE-APPOINTMENT EVALUATION

A

lab returns the framework on duplicate or fitting cast

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5
Q

block out relief wax is placed on the

A

master cast

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6
Q

This is then Duplicated Twice Using

A

Hydrocolloid. One
is Poured in Stone and one in High Heat Refractory
Material

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7
Q

The wax-up of the RPD
framework is completed
on the

A

refractory cast. The
wax relief and block out
is present on this cast.
This cast is usually white
and the material is high
heat investment.

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8
Q

The wax-up of
the RPD
framework is
completed on the

A

refractory cast

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9
Q

skipped
PRE-APPOINTMENT EVALUATION
dentist is first to evaluate fit on master cast
(4)

A

-path of placement
-action of retentive and reciprocating arms
-areas of interference/scraping of cast
-accuracy of seating

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10
Q

evaluate external/internal surfaces for

A

proper finish and construction

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11
Q

INTRAORAL FIT OF THE FRAMEWORK
armamentarium
(4)

A

good light
magnification
mirror and explorer
fitting and occlusion

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12
Q

FIT OF THE FRAMEWORK TO THE TEETH
(4)

A

-position direct retainers over abutments
-place fingers over rests and push along the path of placement
-framework should move smoothly with minimal resistance
-balanced resistance should exist

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13
Q

BALANCED RESISTANCE
(2)

A

-a more rigid retentive tip on one abutment than another will could tilting
0if the framework is not fully seated, the retainers will not be passive and will exert forces against the teeth

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14
Q

EVALUATE EXTERNAL SURFACE OF RPD
(5)

A

-major connector and minor connector
-rests
-direct retainers
-indirect retainer
0external finish lines

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15
Q

FINISH OF THE INTAGLIO SURFACE
(3)

A

-remove bubbles, blebs, and artifacts
-surface should be smooth and free from irregularities
-surface is not highly polished

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16
Q

POSSIBLE CAUSES FOR FRAMEWORK MISFIT
(4)

A

-faulty impression technique
-faulty casts
-tooth movement
-casting inaccuracy

17
Q

faulty impression (6)

A

-lack of uniform thickness of impression material
-intraoral distortion due to tray movement
-extraoral distortion due to faulty handling
-improper water to powder ratio
-improper spatulation
-failure to use double pour cast formation technique when making impressions in irreversible hydrocolloid

18
Q

TOOTH MOVEMENT
(3)

A

-excessive time lapse from impression to framework try in appointment
-tooth movement due to occlusal disharmonies/periodontal involved teeth
recent extractions

19
Q

-tooth movement due to occlusal disharmonies/periodontal involved teeth
(2)

A

-mesially inclined mandibular molars
-lone standing premolars

20
Q

CASTING INACCURACY
(2)

A

-expansion of investment
-shrinkage of Ni-Chrome alloys is 2.2-2.4% during casting

21
Q

FITTING THE RPD FRAMEWORK INTRAORALLY
(3)

A

-adjust the framework
-adjust the direct retainers
-adjust the occlusion

22
Q

COMMON AREAS OF FRAMEWORK INTERFERENCE
(4)

A

-internal surfaces of direct retainer shoulders
-internal surfaces of direct retainer bodies
-internal surfaces of minor connectors
-interdental papilla areas

23
Q

OTHER AREAS OF FRAMEWORK INTERFERENCE
(3)

A

-reciprocating arms
-lingual plating
-soft tissue

24
Q

DISCLOSING MATERIALS TO IDENTIFY
INTERFERENCES
(3)

A

-NEY spray
-Kerr discolsing wax
-occlude

25
Q

PROCEDURE TO LOCATE INTERFERENCES

A

-dry framework
-place thin layer of indicating material
-insert framework along path of insertion
-apply finger pressure
-remove framework and note areas of interference
adjust area of interference with a small bur or stone
-wipe framework clean and repeat procedure until the framework is seating
-the framework should seat w/o a click
-evaluate contact of direct retainers and reciprocating arms
-check for wedging- modification spaces
-adjust the occlusion

26
Q

-wipe framework clean and repeat procedure until the framework is seating
(2)

A

-no space around rests and plating
-use air to visualize

27
Q

OBJECTIVE FOR ADJUSTING THE
OCCLUSION WITH THE FRAMEWORK

A

assure that the same relationship exists in CR (occlusion) and eccentric functional movement with the framework in the mouth, as exists between the teeth when the framework is not present

28
Q

ADJUSTING THE OCCLUSION ON THE RPD FRAMEWORK
adjust for CR
(2)

A

-maintain bulk of rests for strength
-opposing teeth may need modification

RPD (22 decks)

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