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Dentures > Test 1 > Flashcards

Test 1 Flashcards

1
Q

Treatment planning cast vs. complete denture patient cast

A

Denture patient cast needs to have accurate extensions and all vestibules present

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2
Q

How much clearance is ideal b/t stock impression tray and tissues

A

5-6 mm

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3
Q

Periphery wax on trays

A

Change internal contour to ensure proper spacing b/t tray and tissues and gain additional flange extension

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4
Q

Leave impression unattended?

A

Never

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5
Q

How long til pour alginate impression?

A

Within 10 mins

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6
Q

3 goals of a final impression

A

Exact replica of hard/soft tissues
Max acceptable coverage of supporting tissues
Minimal extension into surrounding movable tissues/muscle attachments

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7
Q

Characteristics of correct impression tray

A

Material is rigid, stable
Easily adjusted
Not bulky

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8
Q

3 final impression techniques

A

Mucostatic
Functional
Selective pressure

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9
Q

Selective pressure vs. other 2 techniques

A

Light to moderate pressure on specific areas of arches, no pressure on other areas.

Mucostatic is minimal to no pressure

Functional is pressure to supporting structures

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10
Q

Primary vs. secondary vs. non-stress bearing areas

A

1/2 can take functional forces. Non can’t take forces. Selective pressure directs forces to functional areas

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11
Q

Feature of a completed denture that increases factors of retention

A

Max. Tissue coverage

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12
Q

Distal maxillary extent of complete denture

A

Vibrating line

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13
Q

Why is relief wax removed

A

Creates chamber to reduce chance of physical pressure from impression tray to non-stress bearing tissues

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14
Q

Why are holes cut into impression tray

A

Reduces hydraulic pressure

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15
Q

Location of post. Palatal seal

A

Vibrating line is posterior limit. Actual location depends on patient

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16
Q

How to minimize roll of tissue in masseter areas

A

Pull tissue from beneath while seating

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17
Q

Good impression material characteristics

A 
Minimally viscous
Polymerized intraorally within 2-3 mins
Hydrophilic
Thixotropic
Doesn’t flow after removed
Not excessively rigid
Cheap
Tolerated by tissues
Exact in recording tissue details
Poured in stone multiple times
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18
Q

Disadvantages of using modeling compound as border molding material

A

Need prep, more equipment/materials

Once cooled, it’s hard to place and remove from undercut areas

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19
Q

Why should max denture not be extended onto movable soft palate

A

Retention compromised

Irritation and trauma to movable tissues

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20
Q

What 8 things do a record base and an occlusion rim help with

A 
Establishing facial contours
tooth selection
Establish/maintain vertical dimension
Interocclusal records
Arrangement of denture teeth
Verification of correct mounting
Esthetic trial insertion
Waxup mold for ext. surface of denture
21
Q

Characteristics of satisfactory record base (6)

A 
Stable on casts and intraorally
Rigid
Accurately adapted to casts
Comfy
Esthetic
Cover supporting tissues of arches
22
Q

What is the exception to blocking out undercuts

A

Labial portion of maxillary cast since base can be placed and removed at an angle

23
Q

Why is master cast soaked in water before making record base

A

Minimize formation of bubbles in completed record base

24
Q

Why must care be taken when trimming record base with acrylic bur

A

Over reduction

Can warp with excessive heating

25
Q

Position of central incisor to the middle of the incisal papilla

A

6-8mm

26
Q

High smile line indicates what

A

Minimum incisogingival height of max ant. Teeth to avoid gummy smile

27
Q

Overall mesiodistal width of the mandibular posterior teeth is governed by _

A

Amount of space available from distal end of canine to beginning of slope to retromolar pad

28
Q

Most common errors in denture tooth selection

A

Too light in shade

Too small in size

29
Q

What determines esthetics?

What determines fullness of lips?

A

Incisal edge is esthetics

Cervical portion determines fullness

30
Q

Two groups of patients don’t want symmetrical anterior teeth

A

Existing dentures

Those who are immediately replacing real teeth

31
Q

Prevalence of complete edentulism in >65 yrs

A

26%

32
Q

Stability, retention and support

A

Sta- lateral displacement and rotation during function
Ret - vertical displacement
Sup- vertical placement

33
Q

Appointments 1-5

A
  1. Examination, diagnosis, prelim impressions
  2. Max/mand final impressions
  3. Max/mand relations
  4. Wax trial denture try in
  5. Insertion/delivery
34
Q

Ridge arch forms (I-III)

A

I: square
II: tapered
III: ovoid

35
Q

Best ridge cross section form

Bad ones

A

U shaped

V is bad, flat, shallow/knife edge is also bad

36
Q

Soft palate throat forms (I-III)

A

I: large and normal, distal to line drawn across 5-12 mm distal edge of tuberosities

II: medium size and normal in form, 3-5mm distal to line b/t tuberosities

III: tissue turns down abruptly 3-5mm ANTERIOR to line b/t tuberosities

37
Q

_ forms the distal limit of the max buccal vestibule

A

Hamilcar notches

38
Q

T/F the buccal ridge resorbs faster than the ridge

A

FALSE - doesn’t because of muscle attachments

39
Q

The _ creates peripheral seal on mandibular denture

A

Retromolar pad

40
Q

Retro mylohyoid space classes

A

I: extra
II: normal
III: small

41
Q

Prognosis is based on what things

A 
Bearing surface anatomy
Tongue pos.
Floor of mouth posture
Neuromuscular control
Denture history
Pyschological classification
42
Q

On the diagnostic casts, peripheral roll should be _ mm and land area should be _ mm

A

2-3

4-5

43
Q

Wax rim thickness at molar, premolar and anterior region

A

8
6
3

44
Q

Camper’s line

A

Inferior border of ala of nose to superior border of Tragus of ear

45
Q

Goals of anterior tooth arrangement

A 
Esthetics
Phonetics
Comfort
Stability
Retention
46
Q

Mandibular anterior teeth should not be placed beyond _

A

The center of the vestibule

47
Q

Indications for non-anatomic (flat) teeth

A 
Severe arch discrepancies
Class III reverse articulation
Poor residual ridges
Poor neuromuscular control
Severely worn occlusion on previous denture
Potential for poor follow up
48
Q

The degree of anatomicality of teeth depends on

A

Ridge height/width

Dentures (1 decks)

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