Brainscape's Knowledge GenomeTM

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


See full index

CSA clinical aspects > CSA failure of restorations > Flashcards

CSA failure of restorations Flashcards

1
Q

Why do we restore teeth?

A
  • improve aesthetic shape/shade/angulation
  • function
  • Stop lesion progression and prevent its recurrence
  • Restore occlusions/ health of periodontium
  • Restore patient comfort and satisfaction
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what depends on how long do restorations last?

A

o Success – Restoration should fulfil objective
o Survival rate – How long does restorations last
o Longevity – How long does restoration last?
o Failure – Inability to meet desired outcome

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

What is median survival rate for amalgam

A

15 years

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

What is amalgam recommended for ?

A

posterior teeth with heavy occlusal forces and patient with high caries risk

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

What is failure rate of composite?

A

50% AFTER 10 YEARS

MEDIAN survival is 8 years

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

what is median survival of GIC?

A

30-42 months in permanent teeth

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

What can’t GIC withstand easily?

A

occlusal forces

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

when does amalgam have a smaller survival rate?

A

for smaller cavities

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

what are the implications of restorative failure?

A

time/cost/material choice/technique/remaining tooth structure

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

What factors affect restoration longevity?

A

o Patient factors
o Operative factors
o Material factors

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

What are patient risk factors?

A
  • Caries risk:
  • Heavy occlusal forces:
  • Tooth to be restored
  • Cavity size and location
  • Pulpal health
  • Periodontal problems
  • Allergies
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What sort of heavy occlusal forces are there?

A

bruxism, risk of fracture under heavy load

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

what does a failed restoration on anterior teeth mean?

A

patient will seek treatment earlier

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

What does location of cavity mean?

A

cavity near gingival margin affected by moisture control

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

What sort of allergies are there?

A
  • Oral lichenoid reaction

* Allery to amalgam or gold alloys, or sensitivity to HEMA in resin composites/fissure sealant

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

What are the allergies usually like?

A

painless and benign

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

What are operative factors to consider?

A
  • know qualities and properties of material
  • Correct cavity design
  • Optimal handling of material
  • Use of exemplary clinical techniques in placement & finishing
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is correct cavity design for amalgam?

A

undercuts for amalgam & must be deeper than 2mm

o Retention/ Removal of unsupported enamel and weakened cusps

19
Q

What are material factors to consider?

A
  • Thermal expansion
  • Compressive strength
  • Rigidity (modulus of elasticity)
  • Surface hardness and surface wear characteristics
  • Flexural strength
20
Q

What does thermal expansion lead to?

A

micro leakage and fracture

21
Q

what is compressive strength ?

A

amount of force material can take before breaks

22
Q

What are factors linking to micro leakage?

A

adhesion property , e.g. composite has a good bonding to tooth so less micro

23
Q

Does amalgam have good adhesive properties?

A

ability to seal itself around margins, known as creep

24
Q

What does creep reduce for amalgam?

A

secondary caries

25
Q

what can form between restorations and tooth surface over time?

A

gaps

26
Q

What is creep ?

A

pulling away of restoration due to occlusal forces

27
Q

what is a result of creep?

A

ditching , food packing can occur here

28
Q

Way in which restorations fails due to disease?

A 
o	Caries
o	Tooth wear 
o	Periodontal disease 
o	Pulpal problem  
o	 Trauma
29
Q

What can overhanged restorations act as ?

A

PFS

30
Q

Way in which restorations fail due to technicalities ?

A

o fractured restoration
o Marginal breakdown (micro leakage
o Defective contours
o failure of retention

31
Q

How do you detect a restoration failure?

A
  • Ppt. symptoms:
  • Visual and tactile inspection:
  • Transillumiation
  • Radiographic examination
  • Occlusal examination:
32
Q

What are patient symptoms?

A

o Pain
o Aesthetic concerns
o Discolouration
o Fracture

33
Q

What are visual and tactile inspections?

A 
o	caries,
o	Marginal breakdown
o	Lost restoration
o	 Excessive discoloration
o	Open contacts and overhangs
34
Q

What is transillumination ?

A

light behind teeth and seeing

35
Q

What is radiographic examination?

A

caries apical and periodontal status, overhangs present

36
Q

What is occlusal examinatiion?

A

occlusal with adjacent teeth, State of tissue, Loss of anatomy of tooth

37
Q

what is the most common reason for restoration failure?

A

caries

38
Q

What is secondary caries?

A

caries next to a restoration

39
Q

How does secondary caries form?

A

o due to incorrect handling/packing/choice of material/dentist didn’t remove all the caries and sealed it up

40
Q

What is the risk for secondary caries like?

A

3.5 times greater for composite

41
Q

what are aesthetic reasons to why restorations fail?

A 
•Causes of colour changes
o Loss of marginal integrity
o Micro leakage of composite resin restorations
o Marginal staining
o Loss of surface luster and polish
42
Q

When do we repair restoration?

A

o No obvious spreading of gross caries
o Sufficient volume of retained restoration remaining and strong enough to resist masticatory forces
o can bond new restoration into ‘old’ restoration and tooth
o No aesthetic mismatches

43
Q

When do we replace a restoration ?

A

if caries is present

CSA clinical aspects (13 decks)

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