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week 71 > Interim FDP Fabrication #3-5 > Flashcards

Interim FDP Fabrication #3-5 Flashcards

1
Q

What are the available materials for provisional #3-5 bridge?

A
  • Acrylic Resins:
    • PMMA
  • Bis-Acryl Composites
    • Chemical Activated
    • Visible Light Activated
    • Dual Activated
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2
Q

What are the advantages and disadvantages of PMMA Acrylic Resins?

A
  • Advantages:
    • can be relined and repaired
  • Disadvantages:
    • exothermic reaction
    • High degree of shrinkage (8%)
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3
Q

What are the advantages and disadvantages of Bis-Acryl Composites?

A
  • Advantages:
    • less shrinkage
    • minimal heat generated during setting
    • use auto mix for delivery
  • Disadvantages:
    • More brittle than acrylics
    • difficult to reline
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4
Q

Connector Design Requirements: Height vs width

A
  • Minimum Height: 3-4mm
  • Minimum Width: 3-4 mm
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5
Q

Connector Design: Cross Section Shape

A
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6
Q

What are the different Pontic design for FDP?

A
  • Hygienic
  • Conical
  • Saddle/Ridge-Lap
  • Modified Ridge-Lap
  • Ovate
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7
Q

Pontic Design: Biologic Factors

A
  • Cleansable tissue surface
  • Access to Abutment teeth
  • No pressure on ridge
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8
Q

Pontic Design: Mechanical Factors

A
  • Rigid
    • (resist deformation)
  • Strong Connectors
    • (prevent fracture)
  • Metal-ceramic framework
    • (resist porcelain fracture)
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9
Q

Pontic Design: Esthetic factors

A
  • Shaped like tooth it replaces
  • Appears to “grow” out of edentulous ridge
  • Sufficient space for porcelain
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10
Q

Hygienic Pontic:

A
  • aka Sanitary Pontic
  • no contact with ridge
    • 2-3mm space b/w ridge & Pontic
    • adequate space for hygiene w/o food trapping
  • used in non-aesthetic areas
    • posterior mandible
  • convex in all directions
    • m/d follow ridge contour
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11
Q

Conical Pontic

A
  • Passive contact w/ridge crest
  • rounded and cleansable
  • Triangular embrasures may trap debris
  • suited for thin mandibular ridges
  • non-esthetic regions
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12
Q

Ridge Lap Pontic

A
  • DO NOT USE
  • Forms a large concave contact w/ridge
  • non-cleansable
  • tissue inflammatio
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13
Q

Modified Ridge Lap Pontic

A
  • Passive contact Facial to ridge crest
  • Convex tissue surface
  • used in esthetic zone
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14
Q

Ovate Pontic

A
  • Highly Esthetic
    • Blunt rounded Pontic tip set into concavity in the ridge
  • Requires pre-prosthetic surgery
  • Maintains pressure on gingiva to mold tissue and interdental papillae
  • Cleansable by motivated patients
  • Pontic appears to be “growing” from ridge
  • eliminates the potential for unsupported porcelain in cervical portion of anterior Pontic
    • compared to modified ridge-lap
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15
Q

Overview Table for Pontic Design:

  • Recommended location
  • Advantages
  • Disadvantages
  • Indications
  • Contraindications
  • Materials used
A
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16
Q

What is the recommended location for hygienic Pontic?

A

Posterior Mandible

17
Q

Advantages & Disadvantages of Hygienic Pontic

A
  • Hygienic:
    • Good access for oral hygiene
  • Disadvantage:
    • Poor esthetics
18
Q

Indications and Contraindications for Hygienic Pontic

A
  • Indications:
    • Nonesthetic zones
    • impaired oral hygiene
  • Contraindications:
    • Where esthetics are important
    • minimal vertical dimension
19
Q

What materials are used in hygienic Pontic?

A
  • All Metal
20
Q

What is the recommended location for Saddle/Ridge-Lap Pontic?

A

Not recommended

21
Q

What are the advantages and disadvantages of Saddle/Ridge-Lap Pontic?

A
  • Advantages:
    • esthetic
  • Disadvantage:
    • not good for oral hygiene
22
Q

What are the indications and contraindications for Saddle/Ridge-Lap Pontic?

A

Not recommended

23
Q

What materials are used in Saddle/Ridge-Lap Pontic?

A

none

24
Q

What is the recommended location for conical Pontic?

A
  • Molars w/o esthetic requirement
25
Q

What are the advantages and disadvantages of conical Pontic?

A
  • Advantages:
    • good access for oral hygiene
  • Disadvantage
    • Poor esthetics
26
Q

What are the indications and contraindications for conical Pontic?

A
  • Indications:
    • posterior areas where esthetics is minimal concern
  • Contraindications:
    • poor oral hygiene
27
Q

What materials are used in conical poetics?

A
  • Metal Ceramic
  • all ceramic
  • all resin
28
Q

What is the recommended location for modified ridge-lap Pontic?

A
  • high esthetic requirement
    • anterior teeth
    • premolars
    • some maxillary molars
29
Q

What are the advantages and disadvantages of modified ridge-lap Pontic?

A
  • Advantages:
    • good esthetics
  • disadvantages:
    • moderately easy to clean
30
Q

What are the indications and contraindications for modified ridge-lap Pontic?

A
  • Indications:
    • most areas w/esthetic concern
  • Contraindications:
    • minimal esthetic concern
31
Q

what materials are used in modified ridge-lap Pontic?

A

Metal Ceramic

All porcelain

All resin

32
Q

What is the recommended location for ovate Pontic?

A
  • Very high esthetic requirement
    • maxillary incisors, canines, premolars
33
Q

What are the advantages and disadvantages of ovate Pontic?

A
  • Advantages:
    • superior esthetics
    • negligible food entrapment
    • ease of cleaning
  • disadvantages:
    • requires surgical prep
    • can’t use for residual ridge defects
34
Q

What are the indications and contraindications for ovate Pontic?

A
  • Indications:
    • Desire for optimal/best esthetics
    • high smile line
  • Contraindications:
    • doesn’t want to do surgery
    • residual ridge defects
35
Q

What materials are used in ovate Pontic?

A

Metal Ceramic

All porcelain

All resin

week 71 (8 decks)

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