Brainscape's Knowledge GenomeTM

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


See full index

BDS3 Restorative > Fixed Prosthodontics > Flashcards

Fixed Prosthodontics Flashcards

1
Q

What is the definition of fixed prosthodontics?

A
  • Area of prosthodontics focused on permanently attached (fixed) dental prostheses
  • AKA indirect restorations
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the types of fixed prosthodontics?

A
  • Veneers
  • Inlays and Onlays
  • Crowns
  • Post and cores
  • Bridgework
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is included in the history and examination?

A

usual plus

  • Occlusion
  • Inter-arch space
  • Inter-tooth space (mesio-distal)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is important to look for in extra-oral exam for fixed pros

A

lips

  • vermillion borders
  • commisures
  • smile line
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are you looking for in occlusion upon examination?

A

Incisal relationship
Excursions of the mandible

  • Protrusion
  • Retrusion
  • Lateral

Canine guidance?
Group function?

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

What special investigations can you do?

A
  • Sensibility testing
  • Radiographs
  • Study models
  • Facebow
  • Diagnostic wax up
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What additional info is useful before diagnosis?

A
  • Diet diary
  • Plaque and gingivitis indices
  • Full mouth periodontal chart
  • Clinical photographs
  • Microbiology, biopsy, haematology
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the layout for treatment planning?

A

IMMEDIATE

  • Relief of acute symptoms
  • Consider endodontics and extractions
  • Consider immediate denture/bridge

INITIAL (Disease Control)

  • Extraction of hopeless teeth
  • OHI and dietary advice
  • HPT
  • Management of carious lesions and defective restorations with direct restorations or provisional restorations
  • Endodontics
  • Denture design, wax up for fixed prosthodontics

RE-EVALUATION

  • Re-assessment of periodontal status, confirm denture/bridge design

RECONSTRUCTIVE

  • Perio surgery
  • Fixed and removable prosthodontics

MAINTENANCE

  • Supportive periodontal care and review of restorations
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

In what cases are veneers useful?

A
  • Improve aesthetics
  • Change teeth shape and/or contour
  • Correct peg-shaped laterals
  • Reduce or close proximal spaces and diastemas
  • Align labial surfaces of instanding teeth
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the Gurel minimal preparation technique?

A
  • Wax up
  • Stent
  • Intra-oral mock up
  • Preparation into mock up (can use depth cut burs)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

When should you not use veneers?

A
  • Poor OH
  • High caries rate
  • Interproximal caries and/or unsound restorations
  • Gingival recession
  • Root exposure
  • High lip lines
  • If extensive prep needed (>50% of surface area no longer in enamel)
  • Labially positioned, severely rotated and overlapping teeth
  • Extensive TSL/insufficient bonding area
  • Heavy occlusal contacts
  • Severe discolouration
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Why restore teeth with inlays/onlays?

A
  • Tooth wear cases (Can Increase OVD)
  • Fractured cusps
  • Restoration of **root treated **teeth
  • Onlays provide cuspal coverage
  • Replace failed direct restorations
  • Minor bridge retainers (not recommended)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Why would we not restore teeth with inlays/onlays?

A
  • Active caries and periodontal diseases
  • Time (Tooth preparation and laboratory fabrication required)
  • Cost
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Why restore teeth with crowns?

A
  • To protect weakened tooth structure
  • To improve or restore aesthetics
  • For use as a retainer for fixed bridgework
  • When indicated by the design of a RPD
    - Rest seats
    - Clasps
    - Guide planes
  • To restore tooth function e.g. restore in OVD
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Why would you not restore with crowns?

A
  • Active caries and periodontal disease
  • More conservation options available
  • Lack of tooth tissue for preparation
  • Unable to provide post and core
  • Unfavourable occlusion
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the principle of crown preparation?

A
  • Preservation of tooth structure
  • Preservation of the periodontium
  • Retention and resistance
  • Structural durability
  • Marginal integrity
  • Aesthetic considerations
17
Q

Why should we preserve tooth structure?

A
  • Can weaken tooth structure unnecessarily
  • Can damage pulp
18
Q

What does under preparation of the tooth result in when doing a crown prep?

A
  • Poor aesthetics
  • Over built crown with periodontal and occlusal consequences
  • Restorations with insufficient thickness
19
Q

Why is retention important when crown prep?

A
  • Prevents removal of restoration along path of insertion or long axis of tooth prep
20
Q

Why is resistance important when crown prep?

A
  • Prevents dislodgement of restoration by forces directed in apical or oblique direction
  • Prevents movement of restoration under occlusal forces
21
Q

How can retention and resistance be created in crown prep?

A
  • Taper (ideal inclination of opposing walls 6-10°
  • Length of walls
  • Path of insertion
  • Grooves and slots
22
Q

Why is length of walls important for crown prep?

A
  • Longer walls interfere with tipping displacement
23
Q

What is path of insertion for crown prep?

A
  • Imaginary line along which restoration is placed onto or removed from preparation
  • All features must coincide with the line
24
Q

How is retention improved?

A
  • Limited number of paths of insertion
25
Q

Why is structural durability important for crown ?

A
  • Resto must contain bulk material that is adequate to withstand forces of occlusion
26
Q

How is structural durability achieved?

A
  • Occlusal reduction
  • Functional cusp bevel
  • Axial reduction(follow contour of tooth)
27
Q

What are the finish line configurations for marginal integrity in crown prep?

A
  • Knife edge
  • Bevel
  • Chamfer
  • Shoulder
  • Bevelled shoulder
28
Q

What is the successful criteria for margins of the restoration?

A
  • Smooth
  • Fully exposed to a cleansing action
  • Placed where dentist can finish
  • Placed supra-gingival or gingival margin where poss
29
Q

What are the reduction measurements for Metal crowns (full veneer gold crowns)?

A

Axial - 0.5mm
Occlusal functional cusps 1.5mm
Occlusal non functional cusps - 0.5mm
Finish line - Chamfer 0.5mm

30
Q

What are the reduction measurements for Ceramic crowns (traditional porcelains)?

A

Axial - 1mm
Occlusal functional cusps - 1.5mm
Occlusal non-functional cusps - 1mm
Finish line - Shoulder 1mm

31
Q

What are the reduction measurements for Metal ceramic crowns?

A

Axial - 1.3mm
Occlusal functional cusps - 1.8mm
Occlusal non functional cusps - 1.3mm
Finish line - Chamfer 0.5mm and Shoulder 1.3mm, 0.4mm metal, 0.9mm porcelain

32
Q

What are the reduction measurements for all ceramic crowns?

A

Axial - 1.5mm
Occlusal functional cusps - 2mm
Occlusal non-functional cusps - 1.5mm
Finish line - Chamfer 1-1.5mm

33
Q

Why should we replace teeth with bridgework?

A
  • Aesthetics
  • Occlusal stability (Prevent tilting and overeruption of adjacent and opposing teeth)
  • Function
    • Mastication
    • Speech
    • Wind instrument players
  • Periodontal splinting
  • Restoring occlusal vertical dimension
  • Patient preference
34
Q

Why would we not replace teeth with bridgework?

A
  • Damage to tooth and pulp
  • Secondary caries
  • Effect on the periodontium
  • Cost
  • Failures
35
Q

What are the different bridge designs?

A
  • Cantilever
  • Fixed-fixed
  • Adhesive/Resin-bonded/Resin retained
  • “Conventional”
  • Hybrid
  • Fixed-moveable
  • Spring cantilever
36
Q

What should you include in your informed consent to the patient?

A
  • Verbal
  • Written
  • Invasiveness / reversibility
  • Likely longevity and success rates (evidence based)
  • Possible complications/consequences
  • Time involved
  • Costs
  • Alternative options
37
Q

What are some things patients may claim if you don’t give informed consent?

A
  • Did not know what treatment was being provided
  • Did not know the cost implications
  • Received no warnings about the risks involved
  • Was not aware of alterative options
  • Did not give consent
38
Q

What’s dentogingival complex and biological width ?

A
39
Q

Reduction measurements for all different crowns?

A

BDS3 Restorative (4 decks)

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