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1

Dentitions of teeth

Primary dentition
Mixed dentition
Permanent dentition

2

primary dentition

formation begins in utero

3

mixed dentition

when primary teeth are being exfoliated and permanent teeth are moving in to take their place

4

mixed dentition occurs

between ages 6 and 12

5

permanent dentition mineralization

starts at birth and continues or until adolescence.

6

Roots have normally completed growth

by 3 years after eruption

7

the WHO

world health organization

8

the WHO defines caries as

a localized post-eruptive, pathologic process of external origin involving softening of the hard tooth tissue and proceeding to the formation of a cavity

9

true or false: Dental caries is a preventable disease

True

10

Dental caries are communicable and its a hygienists job to

educate patients to prevent the spread of dental caries.

11

development of dental caries requires

microorganisms, carbohydrates and susceptible tooth surface.

12

Dental biofilm may contain numerous types of acid-forming bacteria specifically:

Mutans Streptococci and Lactobacilli

13

who developed the standard method of classifying caries.

G.V Black

14

the categories of G.V Blacks classifcations of cavities are used for

Caries, preps and finished restorations

15

Nomenclature by surface

Simple cavity, compound cavity and complex cavity.

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Simple cavity

involves one surface

17

Compound cavity

involves two tooth surfaces.

18

Complex cavity

involves two or more tooth surfaces.

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Phase I in formation of a cavity

incipient lesion

20

Phase II of formation of cavity

Untreated incipient lesions

21

During Phase I of formation of a cavity

subsurface demineralization happens

22

Subsurface demineralization

acid passes through from surface enamel to subsurface area in the dentin

23

Visualization during Phase I of formation of a cavity

area of demineralization not visible by clinical observation

24

First clinical evidence of cavity formation

white area appears with no breakthrough to enamel.

25

During Phase I of cavity formation you can try to reverse cavity by

remineralization.

26

Remineralization

low concentrations of fluoride applied frequently during early phase can provide sources for uptake by demineralized area.

27

Sources of fluoride can be:

dentifrices, mouth rinse, fluoridated water and all possible sources.

28

Untreated incipient lesion

Breakdown of enamel over the demineralized area.

29

Vision during Phase II of cavity formation

Visible to observation and irregular to touch with explorer.

30

Formation of cavity steps.

Sugar source ( any carbohydrate) + bacteria (Plaque) --> formation of acid = cavity.
Bacteria eats sugar source and creates bi product which is acid and acid lying on teeth will cause a cavity.