Dental PLAQUE

Question 1

Source of inorganic component of SUPRA Gingival plaque?

Answer 1

Saliva

Question 2

Source of SUB Gingival plaque?

Answer 2

GCF

Question 3

Plaque calcifications %s?

Answer 3

50% - 2 days…
60 to 90 % - 10 to 12 days
100 % - 14 days

Question 4

When plaque is allowed to accumulate in ABSENSE of any plaque control measures … GINGIVITIS results in??

Answer 4

7 to 21 days

Question 5

PLAQUE most preferably forms on ? N why?

Answer 5

On NON Self cleansing areas…. Like gingival 1 third of tooth… Because there is lack of movement of food… And also in pits n fissures n grooves…

Question 6

PLAQUE is formed by action of??

Answer 6

Bact Enzymes on sucrose and saliva…

Question 7

PLAQUE… N polysaccharides…

Answer 7

Extracellular POLYSACCHARIDES -

::::::DEXTRAN n LEVAN — cause the ATTACHMENT of plaque bact to tooth surface..

INTRACELLULAR POLYSACCHARIDES-

::::: AMYLOPECTIN —stored inside bact cell… Then metabolized to LACTIC ACID —–+ CARIES!!

Question 8

Bact in Plaque r held together by?

Answer 8

• – Van sat wal’s forces
• – Hydrophobic bond
• – Covalent bond

Question 9

Prerequisite for PLAQUE formation

Answer 9

PELLICLE

Question 10

Ecolologic determinants of plaque depend on all except?

Answer 10

• —- sugar content of diet
• —- host resi
• —- status of dentition….

—– but not on age or sex!

Question 11

Characteristic of SUPRA Gingival plaque but not of SUB Gingival?

Answer 11

Bact composition is altered by dietary composition…

Question 12

As plaque calcification increases which bact increase?

Answer 12

Filamentous bact increase… ———–+

A

• – foci of calcification changes from basophilic to EOSINOPHILIC…
• – STAINING tendency decreases…

Question 13

After how long of beginning of plaque formation does Ch gingivitis occur??

Answer 13

2 to 3 wks