periodontal microbiology and calculus

Question 1

inflammation due to gingivitis begins at how many days with no oral hygeine

Answer 1

10 days. once oral hygiene starts, it will decrease after 3-4 days

Question 2

plaque biofilm

Answer 2

organizes cooperating community of organisms with specific inter bacterial and host bacterial interactions

Question 3

how can you tell the difference between plaque and materia alba

Answer 3

spray with water. materia alba isnt an organized structure and can be displaced with water

Question 4

difference between plaque and calculus

Answer 4

plaque is yellow-gray and is composed of bacteria in a matrix of glycoproteins and polysaccharides, while calculus is a hard deposit formed via the mineralization of plaque

Question 5

non specific plaque hypothesis

Answer 5

relationship between NUMBER of bacterial mass and pathogenic effect

Question 6

specific plaque hypothesis

Answer 6

increased risk in sites colonized by potentially pathogenic organisms

Question 7

socransky et all hypothesis

Answer 7

organisms can be the cause or result of disease

Question 8

t/f. all gingivitis is converted to periodontitis

Answer 8

false

Question 9

worst type of bacteria in diseased mouth

Answer 9

p ging, t forsythia, t denticola

anaerobic

Question 10

normal oral microbiota

Answer 10

strep: s mitis, s oralis, s sanguis, s gordonii, s intermedius
aerobic

Question 11

nutrition of supragingival plaque vs subgingiva plaque

Answer 11

supra - saliva

sub -gcf

Question 12

describe biofilm formation

Answer 12

1. colonization of G+ facultative anaerobes 2. bacteria adhere to pellicle (made of slivatry glycoproteins and abs)
2. alteration in surface charge and free energy and bacteria that attach will vary
3. increase in thickness of biofilm creates a gradient

Question 13

skeleton of plaque

Answer 13

mutans

Question 14

energy source of plaque

Answer 14

dextrans and fructans

Question 15

t/f. calculus causes periodontal disease

Answer 15

false. it does not. plaque does

Question 16

describe supragingival calculus

Answer 16

coronal to gingival margin, white, clay like, can detect from tooth surface, opposite salivary ducts

Question 17

describe subgingival plaque

Answer 17

below gingival margin, hard, dark, extends to base of pocket, does not reach JE

Question 18

t/f. calculus represents a secondary product of infection and is a primary cause of periodontitis.

Answer 18

false. it is NOT a primary cause of periodontitis

Question 19

4 forms of calcium phosphate

Answer 19

brushite, octa calcium phosphate, hydroxyapatite, whitlockite

Question 20

brushite

Answer 20

basis for supragingival calculus formation and is seen in recent calculus

Question 21

octa calcium phosphate

Answer 21

predominant in exterior layers and forms platelet like crystals

Question 22

hydroxyapatite

Answer 22

predominant in inner layers of old calculus and forms rods or sand-grain like crystals

Question 23

whitlockite

Answer 23

most common form in subgingival calculus and forms hexagonal crystals

Question 24

t/f. roughness of calculus initiates gingivitis

Answer 24

false it does NOT