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Fixed Prosth, Module I > Tissue Management, Impression Making, Definitive Casts and Dies (Pt. I) > Flashcards

Tissue Management, Impression Making, Definitive Casts and Dies (Pt. I) Flashcards

1
Q

Introduction

oImpression must include:
n Sufficient \_\_\_\_ tooth structure immediately adjacent to the margins
pTo identify contour of tooth and prepared surfaces
n All teeth in \_\_\_\_
pAllows casts to be accurately \_\_\_\_
pLingual surfaces anterior teeth
nInfluence \_\_\_\_
n Soft tissues immediately surrounding
tooth preparation
A

unprepared
arch
anterior guidance

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2
Q

Include unprepared tooth structure to develop ____

A

contours

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3
Q

Avoid:

(1) ____
(2) Tears
(3) ____
(4) Other imperfections

For optical impressions, avoid: ____

> >

Inaccuracies in ____

A

air bubbles
thin spots
artifacts
restoration fabrication

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4
Q

Introduction

oMoisture control
n One of the most important aspects of \_\_\_\_ making
n Control \_\_\_\_
n Control \_\_\_\_
n Moisture may result in \_\_\_\_
A

successful impression
saliva
bleeding
VOIDS

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5
Q

(1)Tissue Health

oMust evaluate health of surrounding soft tissues
o____ must be treated and resolved before fixed prostheses placed
oAttempt to minimize ____ damage during preparation
n Especially with ____ preparations, may be unavoidable
oWell-____ provisional restoration imperative to restoring gingival health

Soft tissues must be returned to optimum state of health prior to impression making

A

periodontal disease
soft tissue
subgingival
contoured

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6
Q

(1)Tissue Health
Poor contours contribute to ____ and ____ of gingival tissues

Must reduce ____ prior to impression

A

inflammation
recession
inflammation

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7
Q

(1)Tissue Health

oOften better to ____ impression making and improve oral health
n Quality ____restorations
n Reinforce homecare

oMinor gingival hemorrhage
n ____
n Infiltrating a ____ directly into gingival papilla

A

delay
provisional
astringent
local anesthetic

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8
Q

(2)Saliva Control

oSeveral techniques for dry field
n \_\_\_\_
n \_\_\_\_
n 􏰀\_\_\_\_􏰁 angles
n Different \_\_\_\_ available
pAntisialagogic action pPrescribe cautiously
A

cotton rolls
saliva ejectors
dry
medications

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9
Q

(3)Displacement of Gingival
Tissues

oOften needed to gain access to prepared tooth oCan be achieved by
n Mechanical
p____ (most effective)
p____ with direct pressure

n Chemical
p____ or epinephrine cause
localized soft tissue shrinkage

n Surgical
p____, excision with scalpel or electrosurgery or laser

A

gingival retraction cord
foam or paste

aluminum sulfate
curettage

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10
Q

(3)Displacement of Gingival
Tissues

oDisplacement cord
n Non-____ cord
n Chemically impregnated cord or dipping cord in astringent
pContain ____ or iron salts
and cause transient ischemia
n____ the gingival tissue pEpinephrine-containing cord
nUse with caution due to ____

oSulcus closes within ____ seconds, once removed
n Make impression ____

A 
impregnated
AI
shrinking
tachycardia
30
immediately
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11
Q

(3)Displacement of Gingival
Tissues

o\_\_\_\_
(hemodent)and \_\_\_\_ (astringident)
n Medicaments which help control seepage of \_\_\_\_
p\_\_\_\_ hemostatic gel
p\_\_\_\_ tissue damage
A 
aluminum chloride
ferric sulafte
gingival fluid
coagulative
minimum
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12
Q

(3)Displacement of Gingival
Tissues

oContact between the astringent and prepared tooth surfaces must be minimized to maintain ____
n Subsequent dentinal tubule sealing may be desirable to decrease ____

A

smear layer

post op sensitivity

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13
Q

(3)Displacement of Gingival
Tissues

oTechniques
n Single cord technique 
n Double cord technique
pThin cord placed without \_\_\_\_ at bottom of gingival crevice
n Left during \_\_\_\_
n Minimize \_\_\_\_

pSecond ____ cord placed on top for lateral tissue displacement
n Removed prior to ____

A

overlap
impression
seepage

larger
impression-making

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14
Q

(3)Displacement of Gingival
Tissues

oIsolate prepared teeth
n ____
n ____

oGently dry
n Do not excessively ____
pPostoperative sensitivity

oCut length of cord sufficient
to ____ tooth
oDip cord in astringent and squeeze excess with gauze
n If place dry cord, moisten before ____ to prevent tearing epithelium

A 
cotton rolls
saliva ejector
dessicate
encircle
removal
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15
Q

(3)Displacement of Gingival Tissues

oLoop the cord around the tooth
oGently push cord into sulcus
n Start \_\_\_\_ 
peasier
n Angle instrument toward \_\_\_\_ to push directly into sulcus
n Second instrument may aid placement
A

interproximally

tooth

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16
Q

(3)Displacement of Gingival Tissues
oTissue must be displaced gently but with sufficient firmness to place just ____ to gingival margin
oAvoid overpacking due to tearing of gingival attachment
n ____ recession
oRepeated use may also cause gingival recession

A

apical

irreversible

17
Q

Impregnated ____ cord prepacked into entire crevice

Impregnated ____ cord on top

A

extra thin

thin

18
Q

(3)Displacement of Gingival
Tissues

oEvaluation
n When looking at tooth,
view from occlusal aspect
pNo \_\_\_\_ folded over
n When remove cord, should be able to see entire preparation margin \_\_\_\_
A

soft tissue

circumferentially

19
Q

(3)Displacement of Gingival Tissues
oOther tissue displacement methods:
n (a)Displacement paste
p____-containing paste injected into ____
n (b)Electrosurgery
pRemoves ____ of gingival sulcus to improve access
nPossible ____ n

(c)Soft tissue laser
pCan remove ____ amount of tissue before impression making

A 
aluminum chloride
sulcus
inner epithelial lining
gingival recession
controlled
20
Q

(3)Displacement of Gingival
Tissues
(a)Displacement Paste
oProvides good ____ with less discomfort than cord
oProvides ____ tissue displacement than cord
oCan make subsequent lab steps more ____

Foam placed and pressure placed with ____

A

hemostasis
less
problematic
hollow cotton roll

21
Q

(3)Displacement of Gingival Tissues
(b)Electrosurgery
Tissue only removed from ____ of sulcus

Tip of electrode passed through the ____

A

inner surface

hyperplastic tissue

22
Q

(3) Displacement of Gingival Tissues
(b) Electrosurgery

 oContraindicated with \_\_\_\_
oNot suitable on \_\_\_\_ attached gingiva
n Ex. Labial \_\_\_\_
oCannot use with \_\_\_\_ due to possible electric shock
oProfound soft tissue \_\_\_\_ mandatory
A 
electronic medical devices
thin
maxillary canines
metal instruments
anesthesia
23
Q

3) Displacement of Gingival Tissues
(c) Laser

Trough made with ____ before impression making

Results in ____ or no patient discomfort and is more ____ than conventional displacement for hemostasis

A

laser
minimal
effective

24
Q

Impression Making
Procedure

oEvaluate custom tray in mouth to verify fit
n Correct as needed
oTray adhesive applied
n Extend few mm onto ____ surface of tray
oIsolate abutment teeth oPlace

A

external

gingival retraction cord

25
Q 
Impression Making
Procedure
oMix impression material n (1)2 paste technique
pMix catalyst and base together
nBlend thoroughly

nFor light body
oLoad syringe
nFor heavy body
oLoad tray

A

YA

26
Q

Impression Making
Procedure
oMix impression material n (2)Automix technique
pCartridge inserted into gun- like device
n Bleed cartridges before tip placed
pBase and catalyst extruded into mixing tip
n Place light body directly on tooth with ____
oOr in syringe
n Heavy body into ____

A

tip

tray

27
Q

Impression Making
Procedure

oMix impression material n (3)Machine mixing technique
p\_\_\_\_ mixing technique
pConvenient 
pProduces \_\_\_\_
impressions
A

alternative

void-free

28
Q

Impression Making
Procedure

oRemove ____
oGently dry preparation with ____
oPlace tip of syringe nozzle against ____

A

displacement cord
compressed air
margin

29
Q

Impression Making
Procedure

oInject material slowly
n Insert tip at \_\_\_\_ first
pPrevents material from flowing down over prep and trapping air bubbles
n Tip moved to follow the \_\_\_\_ rather than traveling ahead of it
n Cover all margins
n Extend additional material
pEdentulous spaces
pLingual anterior teeth
pOcclusal surfaces posterior teeth
A

distal embrasure

material

30
Q

Impression Making
Procedure

oSeat tray
n MUST REMAIN ____ while material undergoes polymerization
p____ minutes depending on material
p**____ impression removal is a common cause of impression distortions

A

immobile
6-12
premature

31
Q

Impression Making
oClosed-Mouth Impression Technique (Dual arch or Triple Tray)
n For ____ units
n Made at ____
pAt patient’s OVD
n Impression material supported by thin ____
pInaccurate if patient closes down on ____ of tray
n Need to perform laboratory steps VERY CAREFULLY
pNo ____relationships recorded n Controversial

A 
single
maximum intercuspation
mesh frame
side
eccentric
32
Q

Impression Making
Disinfection

oDisinfect all impression materials according to recommendations for each material
oImmediately rinse with ____ and dry
oSuitable chemicals such as ____ or iodophor sprays
n See if compatible with impression material pPolyether or 􏰀hydrophilic􏰁 addition silicone
impression materials should be sprayed
n Do not soak in ____
oEssential for preventing ____ and exposure
oShould not affect impression accuracy if done correctly

A

tap water
glutaraldehyde
glutaraldehyde
cross-infection

33
Q

Impression Making
Disinfection

TABLE!

A

ya

34
Q

Impression Making
Preclinical Technique

oTry in custom tray in dentoform
n Adjust as needed
oBrush thin layer PVS adhesive and air dry ____ minutes.
oPlace #1 retraction cord around #19 once and then, cut
oBlock out interdental spaces of #22-#27 with beading wax
n Not to extend onto the ____ surfaces

A

10

occlusal/incisal

35
Q 
Clinic materials (PVS)
Clinic materials (Polyether)
tables!
A

ya

36
Q

Impression Making
Summary
oDifferent methods to gain access of ____ margins
n ____, chemical,____ pNarrow cord with mild astringent recommended
oCustom tray should be used with ____ impression materials
oAll impression materials should be rinsed, dried, disinfected
oGood impression crucial to accurately fitting restoration

A

subgingival
mechanical
surgical
elastomeric

Fixed Prosth, Module I (13 decks)

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