Root Caries & when Prevention is not enough Flashcards Preview

BDS 2: Adult Restorative > Root Caries & when Prevention is not enough > Flashcards

Flashcards in Root Caries & when Prevention is not enough Deck (28)
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1

Comment on the statistic of having no natural teeth from 1968 to 1998

Fall from 37% to 13%

2

Comment on the relationship between age and root surfaces

- With age, more root surfaces exposed to the oral environment
- Therefore, the surface area of exposed roots exposed increases
- The exposed root surfaces are then susceptible to dental caries

3

Why may the gingivae recede? (2)

- With age
- Due to periodontal disease

4

Why don't restorative materials work well on the root? (3)

- Structure of dentine
- Close proximity to gingival level
- Hard moisture control

5

Where are root caries located? (2)

- At cemento-enamel junction
- Apical to cemento-enamel junction

6

Why is it important to distinguish between cervical and root caries?

As treatment differs for both

7

What are some aetiological factors of root caries? (8)

- Root exposure
- Oral Hygiene
- Denture wearing
- Diet
- Saliva
- Fluoride
- Occlusion
- Cariogenic microorganisms

8

Comment on the proportion of acidogenic micro-organisms in plaque between older and younger patients

The proportion of acidogenic micro-organisms in plaque is generally higher in older people than in younger ones

9

How can removable dentures cause caries? (2)

- Plaque retention
- Food trapping

10

What does soft root caries lesion mean for the caries?

Extensive demineralisation, no evidence of intact surface mineral layer

11

What does leathery root caries lesion mean for the caries?

Active root caries

12

What does hard root caries lesion mean for the caries?

- Arrested
- Uniform distribution of mineral throughout lesion

13

How can you classify caries lesions? (2)

- Based on pattern of mineralisation
- Based on clinical features

14

Give some clinical features of active root caries (4)

- Well defined
- Soft, yellowish
- Light brown
- Covered by visible plaque

15

Give some clinical features of slowly progressive root caries (2)

- Brownish black
- Leathery

16

Give some clinical features of arrested root caries (4)

- Shiny
- Smooth
- Hard
- No microbial deposits

17

Comment on the fate of cementum after root exposure

What causes this to happen?

Cementum is loss from brushing

18

What are some diagnostic methods of root caries? (5)

- Dental History
- Visual and tactile examinations
- Radiographic examinations
- Caries Risk assessments
- Saliva tests

19

What are some alternative detection systems for root caries? (5)

- Digital Imaging of Radiographs
- Caries Detectors
- Electrical Caries Monitor (ECM)
- Fibre-Optic transillumination
- Laser Fluoresence System (DIAGNOdent)

20

How does an electrical caries monitor work?

The ECM utilises the fact that sound tooth tissue is a good insulator whereas demineralised tooth tissue is a poor insulator as it contains large quantities of waste

21

How does fibre optic transillumination work?

- Transillumination with a bright fiber-optic light depends on light scattering by the lesions
- Increased opacity of the enamel/dentine is the visual sign of early caries

22

How does the Laser Fluoresence System, DIAGNOdent work?

- This device measures laser fluorescence within tooth structure
- A sound tooth surface exhibits little or no fluorescence, resulting in very low scale readings on the display

23

What is the critical pH of enamel dissolution?

5.2-5.7

24

What is the critical pH of root substance dissolution?

6.0-6.7

25

Where can root caries spread?

Lesions may spread subgingivally

26

What pharmaceutical agents can be used in root caries treatment (4)

- Fluoride
- Chlorhexidine
- Triclosan
- Chlorhexidine and Thymol

27

Name some minimal intervention strategies for root caries (4)

- Fluoridated community
- Fluoride gel application at four-month intervals
- Fluoride varnish at three-month intervals
- Chlorhexidine varnish at three-month intervals

28

What restorative materials are used for intra-coronal restorations? (4)

- Glass ionomer cements
- Composites
- Resin Modified GICs
- Amalgam