Saliva Flashcards

Salivary glands Acid base equilibria in Oral Environment Saliva Composition and Function

1
Q

A substance that conducts electricity when dissolved in water is called an

A

electrolyte

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2
Q

howto know if you have strong acid

A

all h’s disassociate

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3
Q

healthy resting saliva ph range

A

6.7-7.4

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4
Q

) buffer system

A

bicarboante

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5
Q

The concentration of bicarbonate ion in resting saliva is approximately
?mmol/L, and this increases to over ?mmol/L on stimulation

A

1

50

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6
Q

lower pka means what

A

stronger acid

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7
Q

neutral solution ph

A

7

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8
Q

erosion of tooth stucture

A

loss of dental
hard tissue due to chemical demineralisation

Acids demineralise the outer surface of enamel or dentine

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9
Q

factors influencing erosion(3)

A

Acid source – extrinsic/intrinsic including GORD
• diet
• Saliva variations like quantity and quality

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10
Q

danger zone for saliva ph

A

5.5

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11
Q

salivary pellicle

A

protein-based layer
which is rapidly formed on dental surfaces after its
removal by tooth brushing

acts as diffusion barrier

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12
Q

buffer solution

A

a solution that has
amounts of either a weak acid and its conjugate base, or a
weak base and its conjugate acid.

can resist change in ph

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13
Q

buffer capacity

A

the amount of acid or base
that a buffer can absorb without a significant
change in it’s pH

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14
Q

saliva

A

is a film of fluid that that keeps the oral cavity moist and coats the teeth and mucosa

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15
Q

3 major salivary glands

A

partoid
submandibular
sublingual

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16
Q

another name for whole saliva

A

mixed saliva

17
Q

mixed/whole saliva is made up of

A

serous saliva and mucous saliva

18
Q

serous saliva

A

watery consistency and high number of consituents dissolved in it

19
Q

mucous saliva

A

thick/sticky secretion

provides lubrication for the mouth

consistency depends on time of day

20
Q

resting saliva rates for each gland

A

submandibular 60%
sublingual 5%
partoid 20%
minor glands 15%

21
Q

saliva basic characteristics

A

protein rich
hypotonic
vresting ph=6.7-7.4

22
Q

important functions of saliva (2)

A

buffering acids
and
pellicle formation that promotes biofilm

23
Q

biofilm

A

semipermeable membrane between the saliva and the tooth surface

24
Q

galvanic shock

A

Pain or discomfort sensation caused
by electric current generated by a
contact between two dissimilar metals
mostly conducted by saliva

25
paratoid salivary glands location
superficial portion anterior and inferior to the ear between the skin and the maeester muscle deeper portion behind the ramus of the mandible
26
submandibular glands locations
in the posterior part of the floor of the mouth adjacent to the medial aspect of the mandible and wrapping around the posterior border of the mylohyoid muscle.
27
classes of salivary ducts
intercalated striated excretory
28
serous acinus in duct system has x layer of epitelium
single
29
mucous acinus in duct system has x layer of epitelium
double
30
2 main secretory cells
serous and mucous
31
myoepethelial cell | location and fucntion
surrounding acinar cells contracts and squeezes acinus to secret saliva