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Oral Biology > oral health aspects > Flashcards

oral health aspects Flashcards

1
Q

what is the range of vol. saliva in the mouth?

A

0.5-2.1 ml

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2
Q

where is salivary film velocity highest?

A

lower, lingual region

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3
Q

where is salivary film velocity slowest?

A

labial and buccal regions

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4
Q

what affect does slow flow have on incidence of caries?

A

cariogenic sugars are retained longer in these regions

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5
Q

what is clearance?

A

the rate at which substances are removed from the mouth

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6
Q

what factors affect clearance?

A

salivary film velocity and location in mouth

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7
Q

what are the implications of clearance?

A

removal of harmful/beneficial materials

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8
Q

what are the clearance stages?

A

stimulus->salivary flow -> accumulation of saliva in mouth -> swallow triggered -> residual vol. -> accumulation of saliva in mouth etc.

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9
Q

what is rapid clearance?

A

removal of harmful substances is increased by high salivary flow

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10
Q

what is slow clearance?

A

retention of beneficial substances is improved by low salivary flow rates

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11
Q

what is a clinical implication of slow clearance?

A

topical F- preparations should be tasteless and tablets should be sucked not chewed

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12
Q

what is a Stephan curve?

A

plaque pH change over time

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13
Q

how do plaque micro-organisms generate acid

A

by metabolising sugars such as sucrose

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14
Q

how does increased salivary flow neutralise plaque acid?

A

increased bicarbonate content

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15
Q

what is the initial impact of gum chewing?

A

large increase in salivary flow rate

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16
Q

what is the secondary impact of chewing gum?

A

the salivary flow subsides to just above the unstimulated flow rate, the pH rises by 0.5pH unit, this persists

17
Q

does chewing sugar-free gum remove plaque?

A

no, however it increases salivary flow, increasing pH so promoting remineralisation

18
Q

what substance causes caries?

A

fermentable carbs, mainly sugars

19
Q

what are the 2 categories of alternative sweeteners?

A

low caloric, and non-calorie, high intensity

20
Q

what is the benefit of alternative sweeteners?

A

sweet taste, can’t be metabolised to acids by plaque bacteria

21
Q

name 4 bulk/cariogenic sweetners

A

sucrose, fructose, glucose, lactose

Oral Biology (11 decks)

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