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CSA SR > Calculus > Flashcards

Calculus Flashcards

to review development and clinical significance of calculus distinguish between supra and sub calc in terms of location distribution formation anf composition appearance morphology describe diagnosis clinical significance

1
Q

what is the definition of calculus

A

mineralised plaque ,calcified/calcifying deposits attached to the surface of teeth or other solid structures in the cavity

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2
Q

what is the location of supraginigval calculus

A

located coronal to the gingival margin

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3
Q

what is the distribution of supragingival calc

A

distributed near the opening of salivary ducts such as the UL/UR6, lower anteriors

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4
Q

what is the location of subgingival calculus

A

located apical to the gingival margin

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5
Q

what is the distribution of subginigval calculus

A

can be located anywhere in the mouth

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6
Q

How does plaque formation help calculus form

A

plaque formation precedes calculus formation and provides an organic matrix

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7
Q

what minerals are derived from saliva for supragingival calc

A

calcium and phosphate

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8
Q

where are minerals derived from for supraginigval calc

A

saliva

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9
Q

where are minerals derived from for subginigval calc

A

GCF(gingival crevicular fluid)

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10
Q

which crystals are found in supragingival calc

A

hydroxyapatite, octacalcium phosphate, brushite(new supra)

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11
Q

what crystals are found in subgingival calc

A

magnesium whitlockite

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12
Q

what shape are crystals in supragingival calc

A

small needle shaped, large ribbon shaped

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13
Q

what size are subg crystals

A

small crystals

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14
Q

calcification mechanisms

A

epitactic and booster

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15
Q

how does calculus form

A

it forms due to small crystals appear in the inter microbial matrix and the matrix between microorganisms becomes calcified and mineralised.

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16
Q

what is the mineral content of saliva by volume

A

37%

17
Q

where is fluoride distribution more regular

A

in subgingival calc

18
Q

what is the mineral content of GCF by volume

A

58%

19
Q

what is the growth like of subgingival calc

A

more homogenous calcification, slow growth, less filamentous

20
Q

what is the growth of of supraginigval calc

A

more filamentous, faster

21
Q

what is the appearance of supra calc like

A

creamy white, yellow may be stained in smokers

22
Q

which minerals are less proportion in supragingival calc than in subginigval calc

A

Ca,Mg,F,Sr,Zn

23
Q

which minerals are greater proportion in supraginigval calc than subginigval

A

carbonate and Mn

24
Q

what is the appearance of subginigval calc

A

darker,brownish could be black

25
Q

what is the morphology of supra calc like

A

it is usually amorphous ( doesnt have a distinguised shape)

26
Q

what is the morphology of sub calc

A 
crushy,spiny,nodular
ledge or ring formation 
thin,smooth veneers 
finger and fern like 
islands or spots 
supra can also be ontop of sub sometimes
27
Q

why can RSD be difficult sometimes

A

due to the spiny, nodular and crusty deposits which might be difficult to clean effectively

28
Q

what is the diagnosis of supragingival calc

A

location
colour
rough feeling
dry with 3-in-1 and will be chalky

29
Q

diagnosis of subgingival calc

A

location
deposit colour
WHO 621 probe
visible following recession or attachment loss
papilla dark red colour- check with WHO probe
grey shadow under ginigva- check with WHO probe
radiography

30
Q

what is the probing force we should use

A

20-25g

31
Q

what is the size of the ball end on the WHO 621

A

0.5mm

32
Q

what instruments are used for RSD

A

SGC 11/12
SGC 13/14
vision curette

CSA SR (52 decks)

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