Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Tim's Cards > Fixed Exam 1 > Flashcards

Fixed Exam 1 Flashcards

1
Q

What is Mutually Protected Occlusion?

A

Posteriors protect anteriors and vice versa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How do posterior teeth protect anterior teeth from a design perspective?

(3 things)

A

Posteriors have more roots

Occlusal table is larger

Orientation of the teeth is oriented along the vertical axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How do anterior teeth protect posterior teeth?

A

Disengage posterior teeth in mandibular excursive movements (canine guidance) - LONGEST ROOT

Moves fulcrum forward (less force)

Muscles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Why is it important to disengage the posterior teeth in excursive movements?

A

Prevent cusp breaks

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The disengagement of posterior teeth in mandibular excursive movements is done by…

A

Canine guidance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

When multiple posterior teeth are touching, this is called…

A

Group function

maximum intercuspation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How are anterior teeth designed to protect posterior teeth?

A

Canine has LONGEST ROOT and therefore takes lateral forced better

Fulcrum

Muscles - reduction of elevator mm. activity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How does moving the contact point anteriorly effect the force applied to the tooth?

A

Further away from fulcrum, the less force applied

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

When occlusal forces are moved forward to the anterior teeth, what feedback shuts off elevator muscles to decrease force?

A

Proprioceptive from the PDL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What discludes the posterior teeth in laterotrusive movements?

What discludes the posterior teeth in protrusive movements?

A

Canines

Incisors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Occlusal trauma is defined as exceeding the adaptive and reparative capacity of the _______

A

peridontium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Abnormal/Excessive occlusal forced acting on the teeth with Normal periodontal support

A

Primary Occlusal Trauma

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Primary occlusal trauma can be from a barfight or ….

A

Iatrogenic

*filling too high

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Normal occlusal force with decreased periodontal support is _____ Occlusal Trauma

A

Secondary

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are the 4 signs/symptoms of occlusal trauma?

A

Pulpitis

Mobility

Fremitus

Widened PDL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the difference between Mobility and Fremitus?

A

Fremitus is vibration in occlusion (more vibration than adjacent tooth)

*Fremitus can lead to mobility

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Average width PDL:

A

0.17 mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Class I tooth mobility:

Class II tooth mobility:

Class III tooth mobility

A

0.2 to 1 mm

greater than 1 mm

greater than 1 mm + axial displacement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

How would you treat Primary occlusal trauma?

A

Reduce forces

*back to MPO

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

How would you treat Secondary occlusal trauma?

A

Splint teeth (sharing forces)

*cross-arch stabilization

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

If all posterior teeth are removed you are likely to see….

A

Primary Occlusal Trauma

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

The mesial buccal cusp of a Mandibular tooth occludes with the ______ of the corresponding maxillary tooth.

A

MMR - mesial marginal ridge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

The distal buccal cusp of the Mandibular tooth occludes with _______ of the corresponding maxillary tooth

A

Central Groove

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Where do the maxillary functional cusps occlude?

A

Buccal of lower

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

T/F

Cusp to marginal ridge can either be to one or two marginal ridges

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

What is the most natural type of occlusion found in 95% of adults?

A

Cusp to marginal ridge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

What is the advantage to Cusp to Fossa?

A

forces near center of tooth and very little lateral forces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What are the disadvantages to Cusp to Fossa?

A

Rarely found naturally

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

What are the disadvantages to Cusp to Marginal Ridge?

A

Food impaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

When would you restore teeth to Cusp to Fossa relationship?

Cusp to Marginal Ridge?

A

Full mouth reconstruction

Daily

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q 
T/F
In class we had a minimum of 3 bilateral posterior and three anterior contacts (canines plus 1 incisor)
A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

T/F

Always deepen fossa, not functional cusps

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

T/F

Maintain triangular/marginal ridges by adjusting mesial/distal slopes as well as ridge

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

Why would we adjust the Lingual of the Maxillary anteriors before the incisal edge of the Mandibular anteriors?

A

Phonetics

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

BULL rule:

A

Buccal of Upper Lingual of Lower

*adjust these

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

When does a tooth need a crown (3 reasons)

A

Tooth structure (loss compromises integrity)

Esthetics

Change contours (Survey Crown- supports a removable partial denture)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

What causes the loss of tooth structure?

5 things

A

Caries

Attrition (bruxism) - grinding by friction

Abrasion (toothbrush) - mechanical process

Abfraction (load, flex, cervical area)

Erosion - chemical (acids) intrinsic/extrinsic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

Critical pH

A

5.5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

Composition of Enamel in dentin

A

70%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

An MOD loses ___% of structural integrity

A

70%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

MOD then endo is stronger

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

Erosion often concentrates where (intrinsic)

A

Lingual Max anteriors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

What type of crown supports a removable partial denture?

A

Survey Crown

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

What are the 6 steps to crown making a crown?

A

Preparation - Grind tooth circumferentially (crown prep)

Impression - mold (make)

Mount - turn impression into stone CAST, put on articulator

Wax up

Investment

Casting - burn off wax and fill space with metal

***porcelain cast for last step

45
Q

VDR:

VDO:

A

Vertical Dimension of Rest

Vertical Dimension of Occlusion

46
Q

When adjusting the anteriors you’d rather adjust the linguals of the maxillaries than the incisal of the mandibular for what 2 reasons?

A

Closest speaking space

Esthetics

47
Q

Difference between VDR and VDO =

A

2-3mm

48
Q

For the typodont adjustment there was a minimum of 3 bilateral posterior contacts _____ molar, _____ premolar

A

2 molars

1 premolar

49
Q

For the typodont adjustment there was a minimum of 3 anterior contacts - what were they?

A

Canines and 1 incisor

50
Q

The BULL rule is used in adjusting Laterotrusive movements, what is used when adjusting protrusive movements?

A

MUDL

Mesial of Upper, Distal of Lower

*adjust these

51
Q

What are the 3 primary functions of an impression tray?

A

Carry

Confine

Control

52
Q

What is the most expensive item in making impression?

A

PVS - polyvinyl impression material

53
Q

Boxing was is how wide?

A

2.5mm

54
Q

Stop dimensions on a tray should be 2-3 mm towards the central groove on the buccal of # __ and #___

A

2

55
Q

What are the 3 larger principles to keep in mind while making your preparation?

A

Biologic

Esthetic

Mechanical

56
Q

A crown preparation must be much larger if the pt is young b/c the _________

A

pulp is larger

57
Q

Pulpal insult depends on pt age, whether _____ is used, and type of crown.

A

water

58
Q

What are 2 reasons a preparation for a porcelain fused to metal crown needs at least 1.5 mm?

A

Color

Strength

59
Q

There is always a bevel on the _______ cusp in a crown prep.

A

Functional

60
Q

A chamfer forms a ______ angle

A shoulder forms a _____ angle

A

obtuse

right angle

61
Q

The obtuse chamfer is made from _____ and measures ____ mm

The right angle shoulder is made from _______ and measures ______ mm

A

metal, 0.5mm

porcelain, 1.2mm

62
Q

The chamfer is cut with the _____ bur and is _____ mm wide at the tip

The shoulder is cut with the _____ bur and is _____ mm wide at the tip

A

856, 1.0mm

KR6847, 1.2mm

63
Q

Porcelain is strongest when it is under _______

A

compression

*so portion should rest on flat surface

64
Q

Retention form resists dislodgment in a _____ dimension

A

parallel

65
Q

Resistance form resists dislodgment is in a ______ dimension

A

NOT parallel

*any other axis

66
Q

Occlusal convergence is related to Retention in a _______ manner

A

non linear

*more angle, drops off drastically

67
Q

Height of the prep is important for ________

A

Resistance

68
Q

The higher the _______ ratio, the better Resistance form we have

A

Height to Base

*the narrower and taller, the better the resistance form

69
Q

Do incisors or molars have better Resistance form in a prep?

A

Incisors

*better height to base ratio (won’t know over easily)

70
Q

T/F
A groove in a crown prep effectively increases the height to base ratio

(decreases base measurement)

A

True

71
Q

If the path of placement (draw, path of withdraw) is askew enough it will create an _______

A

undercut

72
Q

A negative imprint of an oral structure used to produce a positive

A

Impression

73
Q

Materials: An impression must be sufficiently ________

viscous enough to be _______

able to set to a rubbery/rigid consistency in less than ____ minutes

Also dimensionally stable (PVS is good, Alginate is ____)

Biocompatible

Cost effective

A

fluid

contained in tray

7

bad

74
Q

What material is used for making impressions?

A

Elastomeric

75
Q

A material that can return to its original form when stressed:

A

Elastic

76
Q

The opposite of elastic:

A

Plastic

77
Q

Plaster, compound, WAXES, and zinc eugenol are….

A

non-elastic

78
Q

What are the 2 types of Elastic materials?

A

Aqueous hydrocolloid

Non-aqueous elastomers

79
Q

What are 2 types of Aqueous Hydrocolloid materials?

A

Agar (reversible)

Alginate (irreversible)

80
Q

What are 3 types of Non-aqueous elastomers?

A

Polysulfide

Polyester

Polyvinyl siloxane (PVS)

81
Q

What are the two types of reactions PVS (polyvinyl siloxane) can go through?

A

Condensation - EtOH byproduct

Addition

82
Q

When using PVS, what is the preferred type of reaction to use?

Why?

A

Addition

*no EtOH (no byproduct whatsoever)

83
Q

Strain is the change in ______

Stress is the ____ applied

A

distance

force

**if elastic, will be linear

84
Q

Working time is when the impression material can be fully ______ without distortion

Setting time is when the material is firm enough to resist _______

A

seated

permanent deformation

85
Q

T/F

Working time is around 2.5 minutes, Setting time is around 7 minutes

A

True

86
Q

T/F

The set time in the mouth for impression material is faster because it is warmer

A

True

87
Q

The property of material that exhibits both viscous and elastic characteristics when undergoing deformation

A

Viscoelastic

*there is a time dependent strain

88
Q

PVS is a material that is both _____ and ______

This means there is a _____ dependent strain

A

viscous, elastic

time

89
Q

T/F

With PVS, the faster you remove the impression the less it distorts. You should remove it with a snapping motion

A

True

90
Q

A time-dependent shear thinning property (aka, time-dependent viscosity):

*PVS has some of this property - if stressed will flow at the beginning)

A

Thixotropic

this is the solid and liquid thing the kid was holding in his hand

91
Q

What are the 2 reasons for retraction cord?

A

Hemostasis (fluid control)

Create space for impression matl into sulcus

92
Q

T/F

Retraction cord is typically soaked in a hemostatic agent

A

True

93
Q

Two brand names for the vasoconstrictor soaked retraction cord are Hemodent and Viscostat Clear and contains 25% _______

A

Aluminum Chloride

*a vasoconstrictor

94
Q

Irreversible hydrocolloid

A

Alginate

95
Q

Our provisional material is a _______ composite resin

A

Bis-Acryl

96
Q

T/F
Bis-Acryl material for our provisional is a low exothermic, low shrinkage, good esthetic, bad brittleness, less stain resistant, limited shades, and cost is bad

A

True

97
Q

T/F

Smaller cord is 000 or 00 and larger is 0.

A

True

98
Q

Retention, think…

Resistance, thin…

A

parallel walls

height to base ratio

99
Q

Which will be the larger number, VDR or VDO

A

VDR - rest

100
Q

T/F

In protrusion there are only 2 reasons anterior protect posterior b/c incisors don’t have longest root like canines do

A

True

101
Q

Why does the functional cusp need to be beveled?

A

Bigger bulk around absorbing load.

102
Q

T/F

One disadvantage to a shoulder is making it smooth

A

True

103
Q

T/F

Unused alginate should be stored in a ziplock so that it remains at 100% humidity

A

True

104
Q

What is the custom tray material?

What is the photoinitiator wavelength?

A

UDMA - Urethane dimethacrylate

UV

105
Q

What is the purpose of adding adhesive to the triple tray?

A

Prevents material distortion by separating from tray

106
Q

856 bur has a ____ mm chamfer

the KR bur is for the _____

6 is rough and ____ is fine

A

1.0 mm

shoulder

8

107
Q

The triple tray captures the opposing arch, the prep, and jaw ______

A

relation

108
Q

The triple tray captures the opposing arch, the prep, and jaw ______

A

relation

109
Q

You need to ______ the mock tooth before making an impression.

A

Equilibrate

Tim's Cards (140 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions