Brainscape's Knowledge GenomeTM

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


See full index

BDS3 CDS > prosthodontics > Flashcards

prosthodontics Flashcards

1
Q

effects of edentulism - 4

A

loss of masticatory function
self esteem
poorer quality of life
speech

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

cawood and Howell ridge resorption classifications

A

1 = before extraction
2 = immediately after extraction
3 = high well rounded ridge
4 = knife edge ridge
5 = low well rounded ridge
6 = depressed ridge

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

why is a parkinsons pt not suitable for dentures

A

dentures require good neuromuscular control

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

what compromises stability of lower denture

A

tongue movements

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

reasons to render a pt edentulous - 5

A

advanced perio/ hopeless teeth

rampant caries

severe and debilitating tooth wear

pre surgery - infection risk

pre chemotherapy - infection risk

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

4 reasons older people get caries

A

xerostomia

sjogrens syndrome

dementia

radiation caries

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

3 methods of complete denture construction

A

conventional
digital
replica

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

when would you make a conventional denture

A

no previous denture or previous denture unsuccessful

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

how would you modify a stock tray

A

green stick wax
soft red wax
putty
reduce with acrylic bur on straight hand piece

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

good impression material to use for retching pt

A

red composition

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

3 things to assess edentulous impression for

A

are all edentulous areas included
are sulcus areas included in denture recorded fully
are there any deficiencies - air blows

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

spacing for special tray when impression will be taken with alginate/heavy bodied elastomers

A

3mm

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

spacing for special tray when impression will be taken with light bodied elastomers

A

no spacing

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

advantages of taking a master impression - 3

A

accurate peripheral extension

records denture bearing area accurately

reduced material - more comfortable

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

aims when taking master impression - 3

A

all relevant areas recorded
no air blows
well rounded borders

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

information to gather when taking denture history - 3

A

age of denture
how many sets
success?

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

dental history for complete denture questions - 3

A

why teeth loss
when teeth lose
any retained roots, pain or swelling

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

what medical problems influence patient suitability for denture

A

neuromuscular problems
parkinsons
stroke
dementia

dry mouth

sjogrens

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

define support of a denture

A

resistance of vertical movement of a denture towards ridge

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

primary and secondary support area of upper compete

A

primary - hard palate
secondary -ridge crest

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

primary and secondary support areas of lower complete denture

A

primary - buccal shelf and retromolar pad
secondary - ridge crest

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

what is ICP

A

complete intercuspation of opposing teeth independent of condylar position

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

what is RCP

A

guided occlusal relationship occurring at most retruded position of condyles in joint cavity - most reproducible

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

define stability of denture

A

ability of denture to resist displacement by functional stresses in a horizontal direction

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

define retention of denture

A

the resistance to vertical displacement of denture away from tissues

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

define adaptation of denture

A

degree of fit between a prosthesis and supporting structures

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

clinical and lab stages of replica denture - 8

A

replica mould of old denture
lab makes replica block
master impression and bite registration
cast impressions and mount casts and set up
try in
process and finish dentures
delivery/insertion
review

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

denture try in checks

A

Lip support
appearance
even contact in RCP
speech
retention and stability
base extensions
lower teeth over ridge

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

denture insertion checks

A

appearance
even contact in RCP
speech
retention and stability
base extensions
comfort

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

denture review checks

A

pain redness ulcers
function
aesthetics
speech
OVD

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

mucocompressive impression meaning

A

pressure is applied and shape of tissue under load is recorded

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

mucostasis impression meaning

A

minimum pressure applied and tissue shape at rest is recorded

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

how could you alter impression technique for flabby ridge

A

use perforated tray over ridge

alginate in non-flabby area - mucocompressive

light bodied silicone on flabby area - mucostatic

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

conventional clinical and lab stages - 10

A

primary impressions
primary casts and special trays
master impression
master casts and record blocks
jaw registration
mount casts and set up teeth
try in
process and finish
insertion
review

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

when would you chose a close fitting tray oner 3mm spaced tray

A

resorbed ridges

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

steps of jaw reg - 7

A

adjust upper for retention
adjust upper for tooth position
adjust upper for occlusal plane

lower tooth position and horizontal jaw relationship

OVD
record registration
shade mould and setting

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

what does LIMBO stand for and when do you use this

A

Lip support
Incisal Level
Midline and canine lines
Buccal corridor
Occlusal plane

use when adjusting record block for complete conventional denture

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

recommended nasiolabial angle and edentulous nasiolabial angle

A

90

96 in edentulous

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

what reference do you use to check anterior occlusal plane

A

interpupillary line

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

reference for posterior occlusal plane

A

ala tragus line

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

what is the neutral zone

A

space between the lips and cheeks one one side and the tongue on the other - area where forces between tongue and cheeks/lips are equal

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

OVD definition

A

distance between set point on maxilla and set point on mandible when teeth/denture are in maximal intercuspation

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

RVD definition

A

when mandible is at rest, distance between point on mandible and point on maxilla

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

what can affect RVD measurement

A

stress
pain
anxiety
tense up facial muscles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

what are the effects of excessive freeway space - 3

A

reduced masticatory efficiency
overclosed appearance
TMJ pain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

effects of reduced FWS - 3

A

excessive load on denture bearing area
continuous muscle activity - pain
noisy dentures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

normal FWS

A

2-4mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

what articulator requires face bow

A

semi adjustable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

materials used for artificial teeth - 3

A

porcelain
composite resin
acrylic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

what do the numbers mean on mould guide top to Botton

A

mould
width of 6 ant teeth flat
width of L central
height of L central

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

factors influencing shade and shape selection

A

pt opinion
photographs
old dentures
existing teeth or partials

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
52
Q

what factors influence posterior teeth choice - 2

A

ridge width
neuromuscular control

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
53
Q

when would you consider cusp less teeth

A

when it is difficult to get reproducible jaw relationship

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
54
Q

before the patient arrives for a try in, what do you check the lab work for

A

correct patient
correct prescription
correct mould and shade
special instructions adhered to
damage?

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
55
Q

complete denture try in check list

A

retention and stability
base extensions
LIMBO
position of teeth
FWS
even contact in RCP
speech
aesthetics

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
56
Q

how would you test pt speech with denture

A

fricatives
count 60-70
days of week

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
57
Q

s sound when testing speech

A

too much FWS or too class 2 as too much air escaping

correct by adjusting ant tooth position or increasing OVD

58
Q

teeth contact during speech

A

reduce OVD and insufficient FWS

59
Q

what can you use to aid detection of areas causing discomfort from new denture

A

pressure indicating paste

60
Q

denture hygiene advice - 5

A

brush dentures daily - non abrasive

rinse after meal

soak dentures daily - 20 mins with alkaline peroxide or hypochlorite - 10 mins if metal - rinse then soak over night in cold water

leave dentures out at night

visit dentist regularly

61
Q

reasons poor denture hygiene - 4

A

poor manual dexterity
xerostomia
wearing dentures full time
lack of knowledge

62
Q

what forms the pellicle layer

A

salivary proteins and bacterial. products

63
Q

fusobacteria produces sulphur products, what is the effect of this on oral cavity

A

halitosis

64
Q

why do fungal spices adhere to dentures

A

candida has affinity for PMMA
acidic environment under denture favours candida activity

65
Q

why does debris accumulate on denture

A

denture surface not smooth
decreased salivary flow in elderly
fit surface nor exposed to cleaning effects of saliva

66
Q

what are the effects of poor denture hygiene - 4

A

caries
halitosis
denture stomatitis
periodontal disease

67
Q

most common mechanism for pneumonia in elderly

A

respiration of food, reflux and oral bacteria into lower respiratory tract

68
Q

how do dentures impact aspiration pneumonia

A

dentures act as reservoir for potential respiratory pathogens thus increasing risk of aspiration pneumonia

69
Q

3 ways to mechanically clean denture

A

soap and soft brush - toothpaste and not soft will scratch acrylic
microwave for 20 secs
ultrasonics

70
Q

chemical denture cleaners - 2

A

alkaline peroxide
alkaline hypochlorite - not for soft lining
acids - not for metal or soft linings

71
Q

what health benefits are there of removing dentures and soaking them over night

A

prevents stomatitis and aspiration pneumonia

72
Q

advantages of immediate denture -4

A

self esteem
function
post extraction healing
avoid drifting of teeth

73
Q

disadvantages of immediate denture

A

poor fit stock tray

74
Q

contraindications of immediate denture

A

MRONJ
dementia
pre chemo / pre radio

75
Q

when is rate of resorption most rapid

A

first 6 months

76
Q

steps of immediate denture to replace one or two anterior teeth that have been affected by trauma or tooth fracture

A

impressions U and L
intra occlusal record
choose shade
prescription to library with design and teeth gonna be extracted
extraction and insertion same day

77
Q

4 displacing forces that affect denture

A

gravity
muscle activity
function
sticky foods

78
Q

define adhesion - give 2 examples

A

physical attraction of unlike molecules for each other

saliva and mucous membrane
saliva and denture base

79
Q

define cohesion

A

physical attraction between like molecules

e.g. saliva film

80
Q

what is atmospheric pressure important for in dentures

A

border seal

81
Q

3 necessary aspects of denture fitting surface

A

full coverage of denture bearing area
good adaptation to mucosa
adequate post dam seal maxilla
adequate extension into lingual pouch

82
Q

another name for retromylohyoid fossa

A

lingual pouch

83
Q

5 factors that make retention and stability difficult

A

atrophic ridges
congenital cleft
fibrous ridge
gagging - can’t tolerate base extension
CoCr adapts less well than acrylic

84
Q

aids to denture adhesion and stability - 2

A

denture adhesives
linings
implants

85
Q

what directly impacts adaptation of denture

A

good impression

86
Q

why is it important to relieve the incisive papilla

A

compression of nasopalatine nerve and vessels by denture

leads to necrosis of areas supplied and paraesthesia of anterior palate

87
Q

what is a relief area

A

denture should be designed so masticatory load is relieved from these areas as these areas can be easily traumatised e.g. thin mucosa or fragile underlying structures or resorption under constant load

88
Q

what is the lingual frenum

A

fibrous band covered in mucosa
important not to be covered by denture as will cause pain and instability
denture must extend adequately around though without encroaching to ensure peripheral seal

89
Q

relief areas for upper denture

A

incisive papilla

90
Q

3 limiting structures for upper denture

A

buccal sulcus
labial sulcus
lingual and buccal frenum

91
Q

relief areas of lower denture - 2

A

mylohyoid ridge

92
Q

support areas of lower denture

A

primary - buccal shelf and retromolar pad
secondary - residual alveolar ridge

93
Q

3 limiting structures of lower denture

A

retromolar pads
buccal and labial and lingual frenum
buccal and labial sulcus

94
Q

4 objectives of complete dentures

A

adequate masticatory function
restore natural appearance
restore normal speech
comfort and preservation of supporting structure

95
Q

4 objectives of complete dentures

A

adequate masticatory function
restore natural appearance
restore normal speech
comfort and preservation of supporting structure

96
Q

4 factors affecting retention of complete dentures and give examples of each

A

physical - adhesion, cohesion, atmospheric pressure, gravity

anatomical - shape of edentulous area, undercuts

physiological - neuromuscular control, saliva viscosity and volume

mechanical - balanced occlusion, position of teeth to ridge and occlusal plane

97
Q

what is atmospheric pressure

A

hydrostatic pressure due to weight of atmosphere on earths surface

98
Q

where should teeth be positioned in respect to lower ridge - 2

A

directly above lower residual alveolar ridge
within neutral zone

99
Q

what should the horizontal distance be between the probe on the incisive papilla and and the probe against the incisor edge of the incisor edge of maxillary central incisors be?

A

1cm

100
Q

height and width of lower record block

A

18mm height
10mm width
2/3 of retromolar pad height

101
Q

height and width of upper record block

A

H ant. 22mm
H post. 18mm
W ant 5-7mm
w Post. 10mm

102
Q

anatomical landmark to use to mark centre line

A

distal of incisive papilla - 10mm to labial surface of incisor

103
Q

alma gauge use

A

determines the vertical and horizontal position of anterior teeth relative to a point on the denture base (e.g. incisive papilla).

104
Q

types of indirect restorations

A

veneers
inlays/onlays
crowns
post and core
bridge

105
Q

why place a veneer - 4

A

improve aesthetics
change tooth shape/colour
correct peg shape laterals
reduce/close diastema

106
Q

4 contraindications to venners

A

poor OH
high caries
gingival recession
heavy occlusal contacts

107
Q

onlay/inlay indications - 3

A

tooth wear
fractured cusps
restoration of RCT

108
Q

when to use crowns - 3

A

to protect weak tooth
improve aesthetics
retainer for bridgework

109
Q

contraindications to crown - 3

A

more conservative option availible
active caries/periodontal disease
lack of tooth tissue for prep

110
Q

what are the 6 principles of crown prep

A

preservation of tooth structure
retention and resistance
structural disability
marginal integrity
preservation of periodontist
aesthetic considerations

111
Q

why preserve tooth structure - 2

A

prevent unnecessary weakening of tooth
protect pulp

112
Q

result of over prep for crown

A

pulp and tooth strength compromised

113
Q

underprop of crown result

A

poor aesthetics
overbuild crown
insufficient thickness of crown

114
Q

meaning of retention of crown

A

prevents displacement of crown along long axis of tooth prep

115
Q

meaning of resistance of crown

A

prevents dislodgement of crown by forces on crown including occlusal

116
Q

ideal taper of walls of crown

A

6-10

117
Q

what property does limiting the number of paths of insertion of a crown improve

A

retention

118
Q

how do you give structural durability to a crown

A

functional cusp bevel
occlusal reduction
axial reduction

119
Q

how do you ensure periodontist is preserved when placing a crown - 3

A

margins smooth and fully exposed to cleaning
placed where dentist can finish them and patient can clean them
placed supra gingival or at gingival margin if possible

120
Q

what is an indirect restoration

A

restoration fabricated outside mouth by technician in lab

121
Q

what is an inlay

A

intracoronal restoration made in lab

122
Q

3 materials used for inlay and onlay

A

composite
gold
porcelain

123
Q

indications for an inlay - 2

A

premolar or molar
occlusal restoration

124
Q

what advantages do inlays have over direct restorations

A

superior materials and margin
won’t deteriorate over time

125
Q

ceramic inlay prep - isthmus and margin

A

1.5-2mm isthmus
shoulder or chamfer 1mm

126
Q

gold inlay prep

A

1mm isthmus
0.5 chamfer margin

127
Q

what is an onlay

A

extra coronal restoration made in lab - like inlays but with cusp coverage - require cuspel reduction

128
Q

indications for onlay

A

sufficient occlusal tooth substance loss
remaining tooth surface weak - caries

129
Q

what margin design is used for onlay or inlay

A

porcelain 1mm shoulder or chamfer
gold 0.5mm chamfer

130
Q

alternative to inlay/onlay - 2

A

large direct restoration
crown
extraction

131
Q

materials for veneer

A

ceramic
composite
gold

132
Q

4 intrinsic causes of enamel discolouration

A

tetracycline
fluorosis
ageing
non vital teeth

133
Q

labial reduction and incisor reduction for veneer

A

0.3 cervical - 0.5 labial mid
1-1.5 incisal

134
Q

alternative option for temporary veneer

A

spot bonded composite - no etch, use bond only and apply composite

135
Q

alternatives for veneer restoration

A

no treatment
microabrasion
ICON - penetrative resin restorations
crowns

136
Q

material for provisional restoration

A

chemically cured bis acrylic composite

pro temp

137
Q

materials for preformed provisional crown

A

polycarbonate
clear plastic
metal - SS

138
Q

problems with preformed crown

A

unlikely to fit accurately
large bank of crowns are needed - costly

139
Q

when are preformed crowns useful

A

when no impression is taken prior to tooth prep or damage

140
Q

what do you use to cement temporary crown

A

temporary luting cement e.g. temp bond

141
Q

advantages of indirect provisional restorations

A

accurate
low shrinkage
high strength

142
Q

indirect provisional restorations material - 3

A

composite
acrylic - common
meta

BDS3 CDS (11 decks)

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