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advanced composite techniques Flashcards

1
Q

When isolating teeth during composite restorations, what is the tooth being isolated from?

A
  • saliva
  • blood
  • gingival crevicular fluid
  • moisture in breath
  • oropharynx protection
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2
Q

Which methods can be used for relative isolation?

A
  • cotton wool
  • split dam
  • optra fate
  • isovac
  • dry guard
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3
Q

Name the 4 types of dental dam clamps.

A
  1. Haller Clamps (arms which extend beyond the clamp)
  2. Tiger Clamps (serrated edges)
  3. Brinker Clamps (anterior, provide retraction)
  4. Soft Clamps (flexible)
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4
Q

What can be used to manage gingival crevicular fluid / gingival bleeding?

A
  1. Ferric Sulphate (15.5%)
  2. Aluminium Chloride (15%)
  3. Electrocautery Machine
  4. LA - vasoconstrictor controls gingival bleeding.
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5
Q

What is air abrasion?

A

Small hand piece which fits onto the slow speed unit.

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6
Q

Does air abrasion remove the need for etching of the enamel?

A

No - use as well as.

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7
Q

Why might air abrasion be used?

A

As some studies suggest it increases bond strength.

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8
Q

Which structural component of teeth gives it its colour?

A

The underlying dentine modulated by the overlying enamel.

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9
Q

Typically, what are the properties of young enamel?

A
  • White Tint
  • High Opalescence
  • Less Translucency
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10
Q

Typically, what are the properties of adult enamel?

A
  • Neutral Tint
  • Less Opalescence
  • Intermediate Translucency
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11
Q

Typically, what are the properties of old enamel?

A
  • Yellow Tint
  • Higher Translucency
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12
Q

Define hue.

A

A change in colour.

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13
Q

Define value.

A

Lightness from black to white.

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14
Q

Define chroma.

A

Strength of colour (colour purity).

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15
Q

Describe the spatial relationship between enamel and dentine over time.

A

The amount of enamel covering the incisal edge reduces and dentine is progressively exposed.

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16
Q

What is the hybrid layer which allows for the adherence of composite to tooth?

A

A mix of collagen and resin achieved when the adhesive penetrates into the collagen network.

17
Q

What does etching the tooth surface do?

A

Removes the superficial mineralised component of teeth and reveals collagen fibres.

18
Q

Describe the effect a wet surface will have on the action of the adhesive.

A

The adhesive would not penetrate the collagen network so the hybrid layer would not form.

19
Q

Describe the impact on an over dried surface on the action of the adhesive.

A

The collagen fibres collapse so no hybrid layer is formed.

20
Q

What benefits do the Spectra ST range have on the quality of the restoration?

A

Provide a more dentine enamel appearance - wider range of shades covered in fewer options.

21
Q

Describe the layering technique.

A

A more opaque shade should be used for where there is dentine, an intermediate shade for the transition and then an enamel shade for where enamel would be present.

22
Q

Which banded burs should be used for finishing the restoration?

A

Yellow and red.

23
Q

What is the suggested protocol for finishing and polishing a composite restoration?

A
  1. Check occlusion and ledges.
  2. Incisal edge, embrasures, proximal surface.
  3. Labial surface - medium, fine, superfine sof-lex
    - enhance
    - beige polishing wheel
    - white polishing wheel
  4. Palatal Surface
24
Q

What is the compound impregnated into enhance burs?

A

Aluminium Oxide

25
Q

What is impregnated into the Enhance PoGo burs to finish a restoration?

A

Diamond

26
Q

When are sectional matrix bands used?

A

For small to medium class II cavities.

27
Q

Why are sectional matrix bands used?

A

Because they have a convex profile to create a more natural contact area, preventing food packing below.

28
Q

SDR flow+ can be placed in increments of up to how many mm?

A

4mm

29
Q

When dispensing SDR flow+, where should the metal tip be placed and why?

A

Buried inside the material to avoid air bubbles.

30
Q

How many mm should be left for SDR flow+ to be capped by normal composite?

A

2mm

advanced composite (2 decks)

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