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BDS4 Restorative - Supple > 1 - Bridgework > Flashcards

1 - Bridgework Flashcards

1
Q

What are the treatment options for a space from tooth loss?

A
  • no treatment
  • replacement
  • orthodontics
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2
Q

What are the reasons for treating tooth loss?

A
  • aesthetics
  • function
  • speech
  • maintenance of dental health
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3
Q

What are the options for replacing a tooth?

A
  • denture
  • bridge
  • implants
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4
Q

Define a bridge.

A

A prothesis that replaces missing tooth/teeth that is attached to one or more natural teeth/implants (abutments)

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5
Q

What are the different types of bridge (by retention)?

A
  • adhesive
  • conventional
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6
Q

What are the different types of bridge (by units)?

A
  • fixed fixed
  • cantilever
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7
Q

What are general indications for bridgework?

A
  • function and stability
  • appearance
  • speech
  • psychological reasons
  • systemic disease
  • cooperative patient
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8
Q

How does systemic disease impact the decision to use a bridge?

A

Some patients cannot tolerate removal prosthesis ie patients with epilepsy

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9
Q

What are local indications for bridgework?

A
  • big teeth
  • heavily restored teeth (conventional)
  • favourable abutment angulation
  • favourable occlusion
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10
Q

Describe favourable occlusion for bridgework.

A

No heavy contact

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11
Q

What are general contraindications for bridgework?

A
  • uncooperative patient
  • medical history
  • poor OH
  • high caries rate
  • periodontal disease
  • large pulp (young teeth, conventional)
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12
Q

What are local contraindications for bridgework?

A
  • high possibility for tooth loss within same arch
  • prognosis of abutment teeth poor
  • span of bridge too great
  • ridge form or soft tissue loss
  • tilting/rotation of teeth
  • degree of prep required
  • periapical status
  • periodontal status
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13
Q

Define abutment.

A

A tooth that serves as an attachment for a bridge

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14
Q

Define pontic.

A

The artificial tooth which is suspended from the abutment tooth/teeth

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15
Q

Define retainers.

A

The extra- or intracoronal restorations that are connected to the pontic and cemented to the prepared abutment teeth (eg wing or crown)

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16
Q

Define connectors.

A

Component that connects the pontic to the retainers

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17
Q

Define edentulous span.

A

Space between natural span that is to be filled by bridge or partial denture

18
Q

Define saddle.

A

Area of edentulous ridge over which the pontic will lie

19
Q

Define pier.

A

Abutment tooth which stands between and support two pontics, each pontic being attached to a further abutment tooth

20
Q

Define unit.

A

Either a pontic or retainer

21
Q

Define a fixed fixed bridge.

A

Retainer at each of the bridge with a pontic suspended between, joined by rigid connectors

22
Q

Define a cantilever bridge.

A

Retainer at one side of the pontic

23
Q

What are the types of adhesive cantilever bridge?

A
  • metal CoCr wing
  • all ceramic
24
Q

What are the advantages of adhesive cantilever bridges?

A
  • minimal to no prep
  • no anaesthetic
  • cheaper
  • less chair time
  • can be used as provisional
  • minimal interference with occlusion
25
Q

What are the disadvantages of adhesive cantilever bridges?

A
  • require excellent clinical technique
  • metal shine through
  • can chip
  • can debond
  • no trial possible
26
Q

What are the indications for adhesive cantilever bridges?

A
  • young teeth
  • good enamel
  • large abutment area
  • minimal occlusal load
  • single tooth replacement
  • can simplify RPD design
27
Q

What are the contraindications for adhesive cantilever bridges?

A
  • poor enamel
  • long spans
  • excessive soft tissue loss
  • heavy occlusal contacts
  • poor alignment of teeth
  • contact sports (?)
28
Q

What makes up the clinical examination for adhesive bridges?

A
  • dynamic occlusal relationships
  • periodontal health
  • radiographs
29
Q

What can be used as a pontic?

A
  • patients own tooth
  • acrylic denture tooth
  • polycarbonate crown
  • cellulose matrix filled with composite
30
Q

What type of bridge is typically used in the anterior?

A

Cantilever

31
Q

What type of bridge is typically used in the posterior?

A

Fixed fixed

32
Q

What are cantilever bridges more successful in the anteriors?

A

There are divergent guidance paths in the anterior due to the long axises of the teeth being at different angles

33
Q

How do you prepare adhesive bridge abutments?

A
  • if sound enamel, no prep required
  • if composite restoration, roughened with slow sped
  • if amalgam, replace with composite
34
Q

Describe the prep for an adhesive posterior bridge.

A
  • 180 degree wrap around
  • rest seats (posterior)
  • supragingival chamfer finish 0.5mm
  • remain in enamel
35
Q

Describe the retainer of a CoCr adhesive bridge.

A

Metal wing with sandblasted surface for micromechanical retention

36
Q

What cement is used for an adhesive bridge?

A
  • dual cure
  • Panavia 21EX
37
Q

Describe the steps of cementing an adhesive bridge.

A
  • isolate tooth
  • etch with phosphoric acid
  • wash and dry
  • apply primer (A and B mixed) for 30s
  • air dry for 2s
  • fit retainer coated in luting cement to abutment
  • remove excess cement
  • oxygen inhibitor placed around cement margins for 3mins
38
Q

What should be done after cementation?

A
  • check occlusion
  • demo how to clean bridge to patient
39
Q

What can be used to clean around a bridge?

A
  • superfloss
  • interdental brushes
40
Q

How does the occlusion adjust to an adhesive bridge?

A

Minimal interference with the occlusion self corrects within 10-14 days due to relative axial tooth movement

BDS4 Restorative - Supple (17 decks)

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