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Removable I > Exam 1 > Flashcards

Exam 1 Flashcards

1
Q

5 ideal features of PRELIMINARY impression tray:

A
  1. Rigidity
  2. Ability to be sterilized OR disposable
  3. Compatible with impression material
  4. Easily modified
  5. Smooth for comfort/protection of oral tissues
    (“RACES”)
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2
Q

An edentulous stock tray should be _____ mm larger than the outside surface of the residual ridge.

A

4-5 mm

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3
Q

3 advantages of irreversible hydrocolloid impression:

A
  1. Low $$$
  2. Hydrophilic (Water <3)
  3. Setting time/viscosity modifiable w/o affecting properties of material adversely
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4
Q

2 disadvantages of irreversible hydrocolloid impression:

A
  1. lack of surface detail

2. poor dimensional stability (syneresis/imbibition)

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5
Q

Wax rim measurements:

A

Maxillary rim height: 22 mm
Mandibular rim height: 18 mm

Anterior: 6 mm wide at midline
Posterior both 8 mm wide, centered over crest of ridge

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6
Q

The anterior incisal position of the mx wax rim should be _______ mm from the center of the incisive papilla measured in a horizontal plane.

A

8-10 mm

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7
Q

Camper’s PLANE extends between…

A

the acanthion (tip of ant. nasal spine) to the center of BOTH external auditory meatuses.

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8
Q

Camper’s LINE (aka “Ala-tragus Line”) extends between…

A

the inferior border of the ala of the nose to the tip of the tragus on the ear.

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9
Q

Frankfort Horizontal Plane extends between…

A

the inferior border of the orbit (orbitale) to the superior point of the external auditory meatuses.

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10
Q

Camper’s Line (ala-tragus line) is ____ degrees under the Frankfort Horizontal Plane.

A

10 degrees

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11
Q

T/F: The ala-tragus line (Camper’s line) is PARALLEL to the Frankfort Horizontal.

A

FALSE

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12
Q

T/F: The anterior radiological landmark for Camper’s plane is the orbitale.

A

FALSE

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13
Q

The anterior reference point for Camper’s plane is __________ to the anterior reference point for the Frankfort Horizontal.

A

inferior

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14
Q

Ideal temperature for the water bath used in border molding:

A

140 degrees F

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15
Q

Bennett angle for our articulators:

A

15 degrees

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16
Q

The change in edentulous residual ridges leading to “outward position of mandible and inward position of maxilla”:

A

prognathic (protruding mandible)

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17
Q

Distal end of mx denture at posterior should end _____ mm anterior to fovea palatinae.

A

1-2 mm

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18
Q

The labial surface of mx wax rim should be finished as:

A

flat

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19
Q

The tendon of this muscle helps ensure the retro-molar pad is a primary stress bearing area for the mn complete denture:

A

temporalis

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20
Q

Resistance to vertical movement of a denture base TOWARDS the ridge:

A

support

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21
Q

resistance to displacement of denture base AWAY from ridge:

A

Retention

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22
Q

Resistance to horizontal or rotational forces:

A

stability

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23
Q

4 materials used for border molding:

A
  1. Polyether
  2. Soft Liners (plasticized acrylics)
  3. Green Stick Compound
  4. PVS heavy body (High viscosity PVS)
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24
Q

Consequences of tooth loss:

A
  1. Residual Ridge Resorption
  2. Changes in intra-oral structures
  3. Decreased masticatory function
  4. Loss of facial support and muscle tonus
  5. Psycho-social effects
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25
Q

3 edentulous impression techniques:

A
  1. selective pressure
  2. mucostatic
  3. functional (“walking”)
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26
Q

The “mucostatic” denture impression technique is:

A

low pressure

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27
Q

Which edentulous impression technique is a “closed mouth” one?

A

functional

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28
Q

When the soft palate is almost COINCIDENT with the vibrating line, which class?

A

Class III

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29
Q

When the soft palate is FURTHEST from the vibrating line, which class?

A

Class I

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30
Q

How long should you wait for PVS adhesive to set in the custom tray before making the impression?

A

10 minutes

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31
Q

4 purposes of the record bases with wax rims:

A
  1. establish level/height of occlusal plane
  2. establish neutral zone/arch form
  3. establish VDO
  4. preliminary CR record
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32
Q

2 foods used to evaluate mastication efficiency:

A

carrots and peanuts wtf lol

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33
Q

2 primary components forming the matrix of SET Triad denture base resin:

A
  1. urethane dimethacrylate

2. acrylic resin beads

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34
Q

3 features of the acrylic resin beads in set Triad denture base resin:

A
  1. ease to trim with burs
  2. retention to PVS
  3. can repair/add more
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35
Q

What 2 muscles move anteriorly that may lead a pt with over-extended dentures to complain about pain when swallowing?

A

superior constrictor and palatoglossus

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36
Q

2 bones of skull an upper complete denture directly res upon the overlaying mucoa:

A

palatine process of maxilla
and
horizontal plates of palatine bone (???)

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37
Q

the mylohyoid muscle fibers run to the tongue horizontally in the:

A

anterior

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38
Q

The Whipmix earbow uses what anterior reference?

A

nasion

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39
Q

Maximal masticatory forces for natural dentition is 200 N and for dentures is:

A

60-80 N

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40
Q

complete denture wearers only generate approximately ___ % of the bite force generated by dentate individuals.

A

20%

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41
Q

Maximal bite force is ___x less for complete denture wearers than for persons with natural teeth.

A

6x less

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42
Q

2 rigid edentulous final impression materials used in mucostatic impression:

A
  1. ZOE (metallic oxide paste)

2. Plaster (impression type)

43
Q

Mastication can change with age becasue muscle tone can decrease by upwards of ___ % between middle and old age

44
Q

Term for ability of people to identify 3D shapes in the mouth.

A

oral stereognosis

45
Q

Ratio of women to men for systemic lupus erythematosus:

46
Q

T/F: A class III residual ridge morphology has a radiographic height of 11-15 mm measured at the least vertical height of the mandible.

47
Q

T/F: The Fox Occlusal PLane is used to mimic the plane of the upper member of your articulator.

A

FALSE (Fox Occlusal Plane is an instrument, NOT an anatomic landmark)

48
Q

Actual chewing time per meal in sec:

A

450 seconds

49
Q

As a consequence of tooth loss, residual ridge resorption causes the mandible to become shorter and …

50
Q

Eight muscles meet at the corner of the mouth at:

51
Q

Disinfectant used for alginate impressions:

52
Q

Histologically, oral tissues are allowed for keratinization to increase if complete dentures are not worn for:

53
Q

As presented in lecture, the study of masticatory performance of a dentate group at an average of 90% demonstrated less performance by denture wearers at an average rate of only __ %.

54
Q

Sjogren’s Syndrome has a peak incidence between ___ years of age

55
Q

The top portion of your Hanau articulator that the max magnetic mounting plate screw down on represents which horizontal plane?

56
Q

4 materials used for record bases:

A
  1. Hard baseplate wax
  2. Light-polymerized resin
  3. Auto-polymerizing acrylic resin
  4. Heat-processed acrylic resin
57
Q

Name of “green” wax used for CRR?

58
Q

Deglutition occurs about ____ x per day

A

500-600 x per day

59
Q

The purpose of a facebow/earbow is to orient the mx cast to the ______ hinge axis of the articulator.

A

transverse

60
Q

Tooth contacts during swallowing are usually of ______ duration compared to those occurring during chewing.

61
Q

Shaping of the border areas of an impression material by functional or manual manipulation of the soft tissue adjacent is…

A

border molding

62
Q

The distobuccal border of the buccal vestibule is primarily influenced by the _______ (muscle).

63
Q

Buccal retention of the mandibular denture base in the posterior has some depression for ___________ and __________.

A

buccinator muscle and buccal fat pad

64
Q

The distal portion of the occlusal table bilateral is bounded by what anatomic structure?

A

Pterygomandibular raphe

65
Q

What is a denture?

A

an artificial substitute for missing natural teeth and adjacent tissues

66
Q

Definition of Complete Denture Prosthodontics

A

Knowledge and skills pertaining to the restoration of the edentulous arch with a removable dental prosthesis.

67
Q

Complete denture aka…

A

Complete removable dental prosthesis

68
Q

Complete dentures are:

A
  1. full mouth rehab
  2. reversible treatment
  3. inexpensive treatment
  4. can be used along with implant restoration
69
Q

Residual Ridge Resorption: tension causes…

A

bone apposition/deposition

70
Q

RRR: compression causes…

A

bone resorption

71
Q

Mandibular RRR is ____x faster than maxially RRR

72
Q

RRR: Mandibular ridge becomes _____ and _______

A

shorter and wider

73
Q

RRR: Maxillary ridge becomes ______ and ______

A

shorter and narrower

74
Q

Masticatory performance:
complete dentures = __%
natural dentition = ___%

A

complete dentures = 60%

natural dentition = 90%

75
Q

Which structure of the mandible is a primary support area AND a landmark which does NOT move?

A

retromolar pad

76
Q

anatomic landmark distal to the junction of hard and soft palate near the fovea palatine

A

vibrating line

77
Q

How long should an edentulous pt NOT wear their dentures before getting a final impression of their ridges?

78
Q

Why should an edent. pt NOT wear their denture for 24 hours prior to getting a final impression?

A

microscopic inflammation

79
Q

Which impression technique do we use to make custom trays?

A

selective pressure impression technique

80
Q

2 purposes of border molding (aka muscle trimming):

A
  1. establish accurate flange length and border thickness

2. achieve retention through border seal

81
Q

Diagnostic casts should be at least ____ mm thick, extend ___ mm minimally from the vestibule, and have a land area with minimum ____ mm width.

A

10 mm thick
2-3 mm vertically from the vestibule
3-5 mm land area width

82
Q

purpose of record bases + wax rims:

A
  1. establish occlusal plane
  2. establish neutral zone / arch form
  3. preliminary CR and VDO maxillomandibular relation records
83
Q

Maxillary lip support: nasolabial angle should be _____ degrees

A

90-100 degrees

84
Q

phonetics of fricatives

A

fricatives = /f/ and /v/ “fifty-five”

85
Q

Anterior Plane landmarks:

A
  1. inter-pupillary line

2. lip line

86
Q

Posterior Plane landmarks:

A
  1. 1/2-2/3 of retromolar pad height at the mn 1st molar area
  2. half of inter-arch distance
  3. Camper’s Plane
87
Q

Distance measured between two points when teeth are in contact, determined by dentist for an edentulous pt, a physiologic range

88
Q

How do you determine VDO?

A
  1. Mechanical = measurement of existing dentures + accurate radiograph records
  2. Functional = Physiologic rest position, phonetics, biting force, swallowing threshold, biting force can be measured using a Boos Bimeter
89
Q

Position when the head is upright and all muscles are in equilibrium/tonic contraction and condyles are neutral and unstrained

A

Vertical dimension of rest (VDR)

90
Q

VDO =

A

VDR - interocclusal rest space (aka freeway space)

91
Q

VDR is always ____ mm greater than VDO

92
Q

name for space between the mx and mn posterior teeth when patient says “s”

A

Speaking Space

93
Q

How do you adjust when VDO is too high?

A

lower the Mandibular wax rim

94
Q

Symptoms of excessive VDO:

A 
"GET CDC"
Generalized soreness
Elongated face
TMJ/muscle soreness
Can't open wide for food
Difficulty swallowing
Clicking of teeth when speaking
95
Q

Symptoms of insufficient VDO:

A 
"A RAID"
Angular cheilitis
Reduced lower face height
Angry facies, frowning
Inadequate space for post, denture teeth
Deep nasolabial folds
96
Q

Primary requirements of good CR record:

A
  1. record correct horizontal relation of mn to mx
  2. exert equalized vertical pressure
  3. retain record in undistorted condition until casts are accurately mounted
97
Q

Accuracy of CR:

A
  1. interocclusal bite registration on record rims (71% accurate)
  2. intraoral gothic tracing (86.5%)
  3. interocclusal wax record w/ all upper and 6 lower anterior teeth (96%)
    Do VDO FIRST, then CR!!!
98
Q

bitter tasting elastomeric impression material

99
Q

smelly elastomeric impression material

A

polysulfide

100
Q

How to get good impression:

A
  1. use accurate custom tray
  2. impress only healthy, “rested” tissue
  3. make sure impression method matched the circumstances
101
Q

Hanau’s Quint:

A
  1. incisal guidance
  2. condylar guidance
  3. cusp height
  4. occlusal plane
  5. compensating curve
102
Q

Total time teeth are subjected to functional forces of mastication and deglutition during a day.

A

10-20 minutes

103
Q

Risk Factors for Candidiasis:

A
  1. Xerostomia
  2. Broad spectrum antibiotic use
    (3. steroid inhaler use) not in textbook, but true
  3. denture wearing
  4. high-carb diet
  5. smoking tobacco

Removable I (2 decks)

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