Microbiology in Periodontics & Endodontics

Question 1

Structureless film on tooth surface, provides matrix for remineralization. Can be removed by abrasive polishing compound & forms again after removal

Answer 1

Pellicle

Question 2

Food debris & loosely attached WBC, exfoliated cells & MO. Easily removed by Rinsing (Least important in oral cavity)

Answer 2

Materia Alba

Question 3

most commonly / Primary cause of periodontitis / periodontal disease.

Answer 3

Plaque

Question 4

Highest component of plaque

Answer 4

Microorganisms

Question 5

Early colonizers of plaque are:

Answer 5

Streptococcus Sanguis & Actinomyces

Question 6

Plaque maturation/Sequential adsorption happens in ____ hrs

Answer 6

48hrs (2 Days)

Question 7

Best way to evaluate the amount and distribution of plaque

Answer 7

Disclosing solution

Question 8

high accumulation of plaque is in

Answer 8

Gingival third or Unused side

Question 9

Flossing of tooth up until

Answer 9

Below the contact point

Question 10

Supragingival has a ___ structure/appearance

Answer 10

Corncob

Question 11

Calcified, mineralized bacterial plaque

Answer 11

Calculus

Question 12

Most abundant type of form of plaque

Answer 12

Hydroxyapatite

Question 13

Magnesium whitlockite is numerous in

Answer 13

Posterior teeth ; Subgingival

Question 14

Most important retention of plaque

Answer 14

Calculus

Question 15

forms after tooth brushing

Answer 15

Precipitation of SALIVARY GLYCOPROTEIN/CHON or Pellicle

Question 16

Early colonizers of plaque formation

Answer 16

Yellow & Purple complex MO
(Streptoc & Actinomyces)

Question 17

Pathognomonic sign of gingivitis

Answer 17

Bleeding on Probing

Question 18

what is the earliest discoloration of gingivitis

Answer 18

Redness

Question 19

Microorganism that causes gingivitis

Answer 19

Red complex MO
(Porphyromas gingivalis, Treponema denticola, Tanerella Forsythia)

Question 20

Complex MO that causes periodontitis

Answer 20

Green complex MO

Question 21

Complex MO that causes Plaque Maturation

Answer 21

Orange complex MO

Question 22

Porphyromonas Gingivalis causes

Answer 22

Generalized Aggressive Periodontitis
PG = GP

Question 23

Perio dis. with skin disease, causes by actinobacillus actinomycetemcomitans

Answer 23

Papillon Lefevre Syndrome

Question 24

Perio dis. with blood disorder

Answer 24

Chediak Higashi syndrome

Question 25

actinobacillus actinomycetemcomitans causes

Answer 25

Localized aggressive Periodontitis.

Question 26

Class of MO in perio that is related to hormones

Answer 26

Prevotella Intermedia

Question 27

hallmark sign of spirochete/treponema

Answer 27

Tissue Invasion

Question 28

Down’s syndrome is high risk for ___ than ____

Answer 28

Perio, Dental caries

Question 29

Most invasive treponema

Answer 29

Pallidum

Question 30

“Co-aggregator” microbial bridge between early & late colonizers

Answer 30

Fusobacterium Nucleateum

Question 31

Most common/Primary/Major cause of pulpitis

Answer 31

Dental Caries

Question 32

Least common cause of pulpitis, Attraction of blood-borne MO to inflamed/necrotic pulp.

Answer 32

Anachoresis

Question 33

Endodontic failure is due to to

Answer 33

Persistent or secondary intra-radicular infections