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Open Questions Flashcards

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1
Q

What are the advantages of Alginate? (3)

A 
cheap
setting time can be controlled
hydrophilic
easy
non-toxic
good surface detail
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2
Q

What are the disadvantages of Alginate? (3)

A

unstable
setting time depends on operator
poor R tear

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3
Q

What are the advantages of Polyethers?

A

hydrophilic
accurate
thixotropic behavior
easy

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4
Q

What are the disadvantages of Polyethers?

A

allergies
fast setting
poor R tear

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5
Q

What are the advantages of Polysulphides?

A

accurate
cheap
long expiration

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6
Q

What are the disadvantages of Polysulphides?

A

hydrophobic
smell unpleasant
non esthetic

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7
Q

What are the advantages of Silicon C?

A

cheap
easy
good tear strength

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8
Q

What are the disadvantages of Silicon C?

A

hydrophobic
low dimensional stability
less accurate

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9
Q

What are the advantages of Silicon A?

A 
acceptable taste
fast
easy to use
accurate
thixotropic behavior
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10
Q

What are the disadvantages of Silicon A?

A 
difficult to mix
hydrophobic
hydrogen release
expensive
difficult to take out of the mouth
latex gloves use only
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11
Q

How are additional silicones commonly reffered as?

A

polyvinyl siloxane

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12
Q

How are irreversible hydrocolloids commonly reffered as?

A

alginates

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13
Q

4 types of elastic materials you know?

A

hydrocolloids (irreversible, reversible)
silicones
polysulphides
polyethers

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14
Q

Which crowns can you use if the tooth is vital?

A

ceramic, zirconia, pfm

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15
Q

Which crowns can you use if the tooth is non-vital?

A

similar but will need opaque layer addition to cover any possible discolouration or post if ceramic not used

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16
Q

Types of removable prosthodontics for replacing a missing tooth:

A

acrylic

cocr

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17
Q

Types of fixed prosthodontics for replacing a missing tooth:

A

implants
conventional bridge (cantilever or fixed)
resin bonded bridge (maryland)

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18
Q

What are the advantages of implants?

A

adjacent teeth not involved at all
aesthetics
good term prognosis

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19
Q

What are the disadvantages of implants?

A

contraindicated wthen OH is poor and to heavy smokers
surgery involved
expensive

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20
Q

What are the disadvantages of conventional bridge?

A

most destructive option

can lead to devitalisation

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21
Q

What are the advantages of conventional bridge?

A

long term prognosis

aesthetics

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22
Q

What are the advantages of resin bonded bridge?

A

quick
predictable
least invasive
aesthetic

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23
Q

What are the disadvantages of resin bonded bridge?

A

can debond easier

metal may be visible - aesthetics

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24
Q

What kind of info do you need when a patient comes to your office?

A
  • complain, dental history, medical history, social history, history of presenting complain
  • clinical examination
  • extraoral examination
  • intra-oral examination: soft and hard tissues
  • special tests
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25
Indications for least invasive method:
good OH neighboring teeth are non-restored single posterior tooth replacement
26
Contraindications for least invasive method:
teeth periodontally involved bruxism abutment teeth are heavily restored
27
Which elastic material do you use for a crown/bridge?
additional silicones
28
Which elastic material do you use for a removable prosthesis?
alginates
29
What are the techniques for mandible manipulation in centric relation?
chin point guidance chin point guidance with anterior jig bimanual manipulation using a spint
30
Maximum Intercuspal Position definition:
=max contact of all teeth together for that individual's occlusion
31
Centric Relation definition:
=bilateral, unstrained mandible position in which the condylar disc is in the most sup ANT position in the glenoid fossa and the initial 20mm of incisal opening is pure hinge axis
32
Which position do we use when we want to make large changes to the occlusion?
RCP
33
What kind of approach is RCP?
re-organised approach
34
Which position do we use when we want to conform the patient's occlusion?
ICP
35
What kind of approach is ICP?
conformative approach
36
What type of defective margins do you know?
over contour over extended under extened open margin
37
What type of cements do you know?
Hard Cements - ex: GIC, Resin Cements | Soft Cements - ex: Zinc Oxide w/ or w/o Eugenol
38
Indications of Soft cements:
- temporaty crowns | - definitive restorations if: symptomatic tooth or trial assessment is required
39
Indications of Hard cements:
- definitive cementation - acid base rxn - polymerisation rxn - combination of above rxns
40
Indications of Glass Ionomer Cement:
single metal or pfm crowns fixed-partial and metal-ceramic dentures patients w/ high risk caries
41
Advantages of Glass Ionomer Cement:
high compression strength reasonable working time Fluoride release
42
Disadvantages of Glass Ionomer Cement:
low tensile strength not resistant to acid dissolution sensitivity to early moisture contamination
43
Indications of Resin Cement:
porcelain veneers ceramic, Zr2O3 and composite onlays resin bonded bridges ceramic, Zr2O3 or fixed-partial dentures
44
Advantages of Resin Cement:
high compressive and tensile strength R to water dissolution R to acid dissolution
45
Disadvantages of Resin Cement:
high technique sensitive marginal leakage due to polymerization shrinkage variable film thickness
46
What type of ceramics do you know?
1. Glass matrix ceramics - ex: feldspatic, synthetic: lithium disilicate, glass infiltrated 2. Polycrystallined ceramics - ex: alumina, stabilized zirconia 3. Resin Matrix ceramics
47
Definition of a crown:
=artificial replacement to restore missing tooth structure using materials such as ceramics, metal, combination of them
48
Types of crowns:
zirconia, all metal, all ceramic, pfm, partial coverage crown(onlay, inlay)
49
most conservative crown to most destructive crown:
zirconia, all metal, all ceramic, pfm, porcelain fused to zirconia
50
Indications for a dental crown:
protection of remaining tooth structure aesthetics abutments for rpd to alter the occulsal plane
51
Measuring and monitoring tooth surface loss:
study casts, wear indices, photographs, direct measurements
52
Basic Erosive Wear Examination (BEWE):
0 no tooth surface loss 1 initial loss of tooth surface 2 distinct defect, hard tissue loss <50% than tooth surface area 3 hard tissue loss >50% of the surface area
53
How can you check the fit of the crown?
visual: margins, direct or w/ mirror, magnification instruments: explorer, correct size tip and angle approach
54
3 reasons for intervention in tooth wear cases:
altered appearance sensitivity / pain loss of function
55
Different types of tooth surface loss?
attrition, abfraction, abrasion, caries, trauma, iatrogenic damage, acid dissolution
56
Attrition description and sings:
=horizontal wear and flattening of incisal edges or cuspal tips of teeth from tooth to tooth contact
57
Acid Dissolution description and sings:
=loss of tooth surface due to chemical processes in facial and cervical areas Extrinsic factors: dietary and environmental -upper ant: B -post: O + P Intrinsic factors: pathological - caries, vomiting -upper ant: P -post: O cupping of incisal edges and cusps tips perimolysis (small enamel rim around lesions) smooth, shiny and rounded lesions
58
All Ceramic advantages:
aesthetics, no allergies, biocompatible
59
All Ceramic disadvantages:
destructive method, low repair potential, wear on opposing dentition, translucent, abbrasive to opposing teeth
60
Monolithic Zirconia disadvantages:
expensive, wear on opposing teeth, translucent
61
Monolithic Zirconia advantages:
aesthetics, no allergies, biocompatible, durable
62
Monolithic Zirconia VS All Ceramic crowns
monolithic zirconia: more expensive and its durable all ceramic: repair potential lower and destructive method

Fixed Prosthodontics (2 decks)

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