3 - Bridgework 3 Flashcards

1
Q

What information is required about the occlusion when planning for bridgework?

A
  • face bow mounted study casts
  • incisal classification
  • canine guidance vs group function
  • opposing teeth over erupted?
  • any signs of parafunction
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2
Q

What should be evaluated in potential abutments?

A
  • angulation/rotation of abutment
  • root configuration
  • surface area for bonding (adhesive)
  • risk of pulpal damage (conventional)
  • quality of endodontics
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3
Q

What are the different types of pontic?

A
  • wash through
  • dome
  • modified ridge lap
  • ridge lap
  • ovate
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4
Q

What is the function of a pontic?

A
  • restore appearance
  • stabilise occlusion
  • improve masticatory function
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5
Q

What are the considerations when choosing a pontic design?

A
  • cleansability
  • appearance
  • strength
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6
Q

Describe the ideal cleansability of a pontic.

A
  • surface smooth (highly polished or glazed)
  • surface should not have join of metal or porcelain as occlusal load can damage (also plaque trap)
  • embrasure should be smooth and cleanable
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7
Q

Describe the ideal appearance of a pontic.

A
  • in the anterior pontic should look as tooth like as possible
  • in the posterior this is sometimes compromised for function
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8
Q

Describe the strength required of a pontic.

A

The longer the span of the pontic the thicker the material required to withstand occlusal forces

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9
Q

Describe a wash through pontic.

A
  • makes no contact with soft tissue
  • functional rather than for appearance
  • lower molar area
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10
Q

Describe a dome pontic.

A
  • acceptable when occlusal 2/3 of buccal surface is visible
  • coronal 2/3 normal, narrowing to a point at soft tissues
  • lower incisors, lower premolar, upper molar areas
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11
Q

Describe a modified ridge lap pontic.

A
  • buccal surface looks like tooth
  • lingual surface cut away
  • small contact with soft tissues at ridge
  • can have problems with food packing
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12
Q

Describe a ridge lap pontic.

A
  • has greater contact with soft tissues
  • still cleanable if designed correctly
  • less food packing than modified ridge lap
  • patient requires good OH
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13
Q

Describe an ovate pontic.

A
  • good for patients with excellent OH who require good aesthetic result
  • presses into gingiva causing moulding around tooth going the appearance of a gingival margin
  • requires Essix retainer with ovate pontic to pre-mould prior to definitive bridge
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14
Q

What are the different types of materials used for conventional bridges?

A
  • all metal
  • metal ceramic
  • all ceramic
  • ceromeric (historical)
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15
Q

What material is used in all ceramic bridges?

A
  • zirconia (LAVA)
  • lithium disilicate (E-max)
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16
Q

What material are used in ceromeric bridges?

A

BelleGlass

17
Q

What is a ceromeric material?

A

Composite and ceramic hybrid (historical)

18
Q

What are the different types of implant retained bridges?

A
  • screw retained
  • cement retained
19
Q
A