Gaining Access & Removal of Carious Tissue Flashcards Preview

BDS 2: Adult Restorative > Gaining Access & Removal of Carious Tissue > Flashcards

Flashcards in Gaining Access & Removal of Carious Tissue Deck (22)
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What type of disease is dental caries?

Reversible but progressive disease


What tissues are affected by dental caries?

Affecting dental hard tissues


What bacteria initiates dental caries?

Initiated by bacteria in a plaque biofilm


What causes the demineralisation of the inorganic component of the teeth?

Fermenting carbohydrates produced by the carious bacteria produce acid which causes demineralisation


What causes the destruction of the organic component of the teeth?

Proteolytic destruction of organic component


What are some isolation techniques used when removing carious tissue? (4)

- Rubber dam
- Cotton wool roll (children)
- Dry guards
- Aspiration (suction)


What are the ideal conditions when detecting caries on a tooth? (6)

- Good vision with magnification
- Good illumination
- Clean tooth surface
- Examine tooth when both wet and dry
- Use a round explorer (not sharp)
- You need TIME!!!


Where are the 3 main sites of caries development?

- Pits & fissures/cingulum
- Approximal below contact area between teeth
- Smooth surface (near gingival margin)


Explain the histology of each ICDAS score (0-4)

0 - No/Minimal enamel demineralisation

1 - Enamel demineralisation outer 50%

2 - Enamel demineralisation inner 50% through to outer 1/3 dentine

3 - Demineralisation of middle to inner 1/3 dentine

4 - Demineralisation of inner 1/3 dentine towards pulp


What do the scores made from bitewing radiographs mean in regards to radiolucency? (0-4)

0 - Sound on bitewing

1 - Radiolucency confined to enamel

2 - Radiolucency in enamel up to EDJ

3 - Radiolucency in enamel and outer half of dentine

4 - Radiolucency in enamel and reaching inner half of dentine


Explain what site is being referred to in each of Black's Classifications (I-V)

I - Pits and Fissures caries

II - Posterior inter proximal caries

III - Anterior inter proximal caries

IV - Incisal edge caries

V - Smooth surface caries


What is one advantage and one disadvantage of bitewing radiographs?

- Good for inter proximal caries

- Less good for occlusal


Which type of radiograph is good for showing occlusal caries?

Dental Panoramic Tomograph


What radiographs are taken for assessing apical status of a tooth?

Periapical Radiographs


What does a sensibility test determine?

Testing the nerve supply


How do you conduct a sensibility test? (3)

- Thermal test (whether or not tooth can feel hot/cold)
- Electronic pulp tester
- Test cavity


Explain the steps of the operative phase of caries management (5)

- Gain access
- Identify sound and carious tissue
- Excavate caries
- Modify cavity for restorative material
- Restore


What is the importance of enamel preparation when dealing with a carious legion? (3)

- Gain access to full extent of lesion
- Remove demineralised and unsupported enamel
- Create sound peripheral margin to seal with restorative material


What is the sequence of dentine removal?

- Identify caries-infected vs caries affected vs sound dentine with a probe
- Identify peripheral extent of caries to EDJ
- Excavate caries from EDJ (clear periphery of lesion)
- Move towards pulp from periphery


What is the retention property of a cavity?

Property of a cavity to resist displacement of the restoration in the direction of its placement


What is the resistance property of a cavity?

Property of the cavity to resist displacement of the restoration in any other direction


What are some other methods of caries removal? (4)

- Air abrasion
- Cavitron
- Carisolv
- Lasers