Fluid Control Flashcards Preview

Fixed Prosth 2 > Fluid Control > Flashcards

Flashcards in Fluid Control Deck (41)
Loading flashcards...
1
Q
  • Controlling water and saliva during tooth preparation
  • Too much water – you can’t see and patient is drowning
  • Too little water – you can heat tooth and cause pulpal necrosis
A

Fluid Control

2
Q

Saliva and crevicular fluid management is crucial for making a quality
impression and for proper cementation
-Soft tissue management, such as gingival displacement, is important for
the preparation, impression, and cementation.

A

Gingival Control

3
Q

Managed with lasers, Electrosurge, or a scalpel to re-contour the
gingiva as well as move or remove it from the operative environment.

A

Soft tissue management

4
Q
Uses for \_\_\_\_\_\_\_:
-Still the gold standard for isolation and 
moisture control
-Caries, O&R, removing old restorations
-Placing a Core
-During Post and Core procedures
-When tissue retraction is difficult 
(hypertrophied tissue or a pseudopocket)
A

Rubber Dam

5
Q

_______ can be used during
preparation and cementation of
Inlays and Onlays.

-provides necessary
isolation for resin cement
procedures.

-used during
preparation for Inlay/Onlay.
Then, it is removed to check
occlusion and clearance.

A

Rubber Dam

6
Q

Primary way to manage fluid during

preparations is with ________

A

high speed suction

7
Q

Isolates both Max and Mand at the same time.
Retracts tongue and cheek
Continually aspirates fluids and oral debris
Obturates throat – prevents aspiration of material
**Used in clinics at UMKC

A

Isovac and Isolite

8
Q

T/F: Medications can be used to reduce saliva (anti-sialagogues)

A

True

9
Q

-Decreases stomach acid and other secretions
including saliva
-Contraindicated in patients with heart disease /
glaucoma/ asthma

A

GI Anticholinergics (Robinul / Pro-Banthine)

10
Q

-Safer that anticholinergics but have side effects like
sedation, blurred vision, allergic reactions
-Caution for hypertensive patients.

A

Clonidine (anti-hypertensive drug)

11
Q

________ is critical in the preparation and

design process of a crown or bridge.

A

Periodontal health

12
Q
Poorly contoured restorations are responsible for 
\_\_\_\_\_\_\_ reactions:
-Roughness and porosity of materials
-Inaccessibility for patient OH
-Lack of patient OH
-Defective crown margins
-Invasion of biological width
A

inflammatory

13
Q

________ for two weeks prior to crown
preparation can be useful in more significant
inflammation situations.

A

Chlorhexidine 0.12%

14
Q

Crown Finish line ideally no deeper than _____ the depth of the sulcus.
-Usually ___-____mm sub gingival

A

half
the depth
0.5 – 1.0

15
Q

______ gingiva– More
susceptible to damage and
recession.

A

Thin, scalloped

16
Q

Rapid marginal recession may occur as
soon as __ weeks. (results in
unpredictable tissue levels).

A

2 weeks

17
Q

These all cause ______

  • Damage during tooth preparation
  • Over contoured provisional
  • Over contoured final crowns
  • Injury caused by cord packing
  • Poor OH resulting in inflammation
A

Poor gingival control causing inflammation

18
Q

Tissue displacement must be _____.

A

gentle

19
Q

Purpose of _______ –

  • To Displace the Gingiva for margin exposure
  • As a cutting guide during tooth preparation
  • Tissue protection during margin placement
  • Visualization of finish line
  • Displacement of gingival tissue for impression
  • When margin is at or below the gingival contour
  • For impression and die trimming
  • Control of crevicular fluids
  • water, saliva, blood
A

Tissue Retraction

20
Q
Placement of \_\_\_\_\_\_ prior to 
preparation.
-Improves visibility
-Reduces tissue trauma
-Acts as a guide for margin placement
A

retraction cord

21
Q

T/F: Most often, begin with a rough
preparation supragingival to start. Then
pack cord. Proceed to finalization of
preparation and margin.

A

True

22
Q

_____ causes horizontal and vertical displacement of tissues to visualize the margin placement
Allows subgingival margins without significant damage to tissues
Can be left in place for final impression using 2 Cord technique
Aiming for no deeper than half the depth of the sulcus.

A

Cord

23
Q

Tissue covering subgingival margins must be
retracted or displaced horizontally by _______:
-Provides space for enough impression
material to record this anatomy.
-Removes fluids and anatomy to accurately
record the crown margins.
-Helps arrests heme
-Aid in cleanliness and dryness prior to
impression.

A

Packing Cord:

24
Q

_______ medicaments control crevicular fluids

and seepage

A

Hemostatic

25
Q
Retraction Cord soaked in \_\_\_\_\_\_
Advantages:
-Can be kind to tissues
-Sulcus not overly harmed and left clean
-No additional tissue loss
Disadvantages:
-Extra epinephrine systemically for patient.
A

Epinephrine

26
Q
\_\_\_\_\_\_ are substances that cause constriction of soft tissues. They have a massive use in 
bleeding control in various dental procedures such as impression making in fixed prosthodontics, 
class V restorations and root surface restorations, etc.
A

Astringents

27
Q

What astringent do we use?

A

Aluminum chloride

28
Q
Advantages:
-Moderate hemostasis and tissue shrinkage
-Precipitates protein
-Contracts blood vessels
-Extracts fluid from tissues
-Leaves sulcus clean
-Sulcus not overly harmed
-Does not inhibit PVS polymerization
Disadvantages:
-Nasty taste
A

Buffered aluminum chloride

29
Q
Advantages:
-Stypic (clotting agent)
-Applied to cut tissue for best hemostasis
Disadvantages:
-Leaves a dark residue (esthetic issue)
-Causes dentin discoloration (delayed)
-don’t use with veneers or esthetic 
anterior cases.
-Inhibits setting of PVS impression materials
-leads to inaccurate impressions
Dentin darkening
A

Ferric Sulfate (15%) Astringedent

30
Q

Which astrigent is used for fixed prosthodontics?

A

Aluminum chloride

31
Q

:Possible high acidity of gingival retraction fluids (GRFs) and the high
affinity of iron for hard tooth tissues, resulting in an interaction with
bacterial byproducts and precipitation of insoluble ferric sulfide in
the porous demineralized dentin.

A

Dentin Darkening

32
Q

Provide adequate thickness of impression material and access to the
preparation margin.
Reduces tears and distortions of impression material
Sulcus is opened in a cone shape

A

Retraction cord

33
Q

-Use of single cord for entire circumference
-In deeper sulcus, a second cord could be
used in select area
-Remove all cords for impression
-Best used in shallow sulcus

A

Single Cord Technique

34
Q

_______ Technique
-#000 or #00 pre-packed into sulcus.
-Second cord placed over the top of existing cord
-For impression, top cord is removed. Second cord
(lower, smaller cord is left in place for the
impression).
-If smaller cord is picked up in impression, it is cut off
prior to pouring up in stone
-Remember – must remove first cord after impression
and before patient goes home! Severe
inflammation and pain can occur.
-This technique is considered the gold
standard for impression taking. All other
techniques are compared to this.

A

Double Cord

35
Q

Should local anesthetic used in tissue retraciton?

A

Yes:
Patient comfort
Aids in heme and salivary flow reduction

36
Q

SHould you pack cord at a straight up and down angle?

A

No; 45 degree angle

37
Q

Packing _____ starting point will keep cord in place3-5 minutes.

A

toward

38
Q

Allow cord to sit and be isolated (dry and heme free) for how long?

A

3-5 minutes.

39
Q

-Burns tissue away
-Burnt tissue odor
-Cauterizes (no bleeding after)
-Tissues heal quickly
-Predictability of final tissue contour or location is
unpredictable
-Inexpensive! (maybe $500 versus $5,000 for laser)
-Easy to use

A

Electrosurge

40
Q

Vaporizes tissue
”Cut” around the tooth is usually ragged
Laser can be slow to cut. Best for fine detail work. If there
is a lot of tissue to contour or remove, use Electrosurge.
Hemorrhage is not a problem
Tissue heals well
Laser available in UMKC Clinic

A

Laser

41
Q

Intentional use of a handpiece to remove excess gingiva
Hemorage can be a problem here
Tissues will heal, but may have some discomfort to patient
Healing contour and levels is unpredictable
Final impression not likely to happen same day. Patient
will have to come back for assessment of healing
results and of tooth preparation and impression.

A

Rotary