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BDS 4: Fixed/Rem Pros > Bridges > Flashcards

Bridges Flashcards

1
Q

What type of bridge design is this?

A

Cantilever

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2
Q

Describe the abutment tooth status, occlusion and OH when a RBB may be indicated

A
  • Patients with sound abutment teeth (no restorations)
  • Occlusion well controlled
  • Good oral hygiene
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3
Q

What are the disadvantages of a RBB?

A
  • Aesthetic concern if metal retainer shines through abutment tooth
  • Chance of debonding
  • Longevity concerns
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4
Q

What is panavia used for?

A

Cementation of a RBB

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5
Q

What is the ideal shape of a pontic?

A

Ovate shape is ideal

(oval outline)

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6
Q

What type of bridge design is this?

A

Fixed-fixed

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7
Q

Why may you have to accept a shortened dental arch in elderly patients?

Choose not to have prosthesis as space replacement

A

In older patients with reduced manual dexterity it may be appropriate to accept a short dental arch

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8
Q

What type of radiograph would you need prior to preparation for a bridge?

A

Ensure you have a contemporary periapical radiograph of the teeth to be prepared

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9
Q

What are some advantages of bridges over implants?

A

Less clinical time

Cheaper than implants

Failure of treatment is less catastrophic

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10
Q

Why may a RBB fail?

A
  • Pontic is involved in guidance (Mandible excursion movement)
  • Parafunctional habits
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11
Q

What type of bridge design is this?

A

Fixed-fixed

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12
Q

What is the role of a connector in a RBB?

A

The connector is the metal element that joins the wing and the pontic substructure.

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13
Q

What type of bridge design would you consider for missing teeth accros the midline?

A

Fixed-fixed

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14
Q

What type of bridge design is this?

A

Fixed-fixed

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15
Q

What type of bridge design is this?

A

Cantilever

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16
Q

What is a wing from a RBB normally fabricated from?

A

Non precious metal alloy

(Nickel-Chromium alloy or cobalt-chrome)

17
Q

What are the materials for a pontic component of a bridge?

A

The pontic is usually porcelain fused to metal substructure

18
Q

Describe how differential movement affects a cantilever bridge

A

Differential tooth movement results in less stress on the bond

Higher success rate (in most situations)

19
Q

What type of bridge design is this?

A

Fixed-movable

20
Q

What are some factors that affect the longevity of bridge?

A

Design (cantilever, fixed-fixed)

Surface coverage (partial or complete)

Connector height (short /long)

Preparation of abutment tooth

Metal surface treatment (sandblasting, silicoating)

Rigidity of framework

Occlusal considerations

Extend of span

Operator experience

21
Q

What are the advantages of a RBB?

A
  • Minimally invasive
  • Inexpensive (compared to conventional)
  • Little clinical time
  • High success rate (predictable outcome)
22
Q

What are some contraindications of RBBs? (4)

A
  • Heavily restored abutment teeth
  • Lack of clinical crown height in the abutment teeth
  • Significant bruxism and parafunctional activity
  • Teeth with extensive bone loss
23
Q

What RBBs have the most favourable prognosis?

What teeth are being replaced

A

Maxillary incisor replacement

24
Q

How many teeth can be included in a posterior RBB?

A

A RBB can only replace a single posterior tooth

25
Q

Why is a cantilever bridge considered less mechanically sound compared to a fixed-fixed bridge?

A

In a cantilever bridge the load is transmitted to one abutment whereas in a fixed-fixed thereare multiple abutments allowing an equal load across these teeth.

26
Q

What are the 3 components of a RBB?

A

Connector

Wing

Pontic

27
Q

Why should tooth position be considered when treatment planning with bridges?

A

It is important to consider if spacing and alignment of natural teeth are favorable to success/longevity of treatment

28
Q

What dental defects may a RBB be indicated in?

A

Hypodontia (not microdontia)

29
Q

What type of bridge design is this?

A

Cantilever

30
Q

In terms of a RBB contacting with an opposing tooth what should be avoided?

A

Avoid sharing contacts between retainer (wing) and tooth

31
Q

Cantilever bridges can be either mesial or distal which ones have better longevity?

Mesial meaning Pontic is mesial
Distal meaning Pontic is distal

A

Mesial cantilevers

32
Q

Which of these cements are:

Dual-cure or Self-cure

Fluoride-releasing or Does not contain fluoride

A

Panavia F 2.0 is a dual-cure, fluoride-releasing adhesive resin cement

Panavia 21 is self-cure and does not contain fluoride

33
Q

How may the periodontal status of an abutment tooth affect your tx planning?

A

Abutments with active periodontal disease should be avoided

As increased functional loading = increased rate of periodontal destruction

34
Q

What do bridges rely on for retention?

A

Rely on composite resin cements

BDS 4: Fixed/Rem Pros (6 decks)

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