The periodontal pocket

Question 1

What is a microbial niche

Answer 1

A specific habitat which is suitable for a specific microbe to grow in

Question 2

What is an obligate aerobe

Answer 2

Can only grow in oxygen

Question 3

What is an obligate anaerobe

Answer 3

Can only grow without oxygen

Question 4

Facultative anaerobe

Answer 4

Prefer no oxygen but can survive and grow in oxygen

Question 5

Aerotolerant anaerobe

Answer 5

Respire anaerobically but can grow in the presence of oxygen

Question 6

What is the bridging species

Answer 6

Fusobacterium nucleatum

Question 7

What is the first bacteria to stick to the acquired pellicle

Answer 7

Streptococcus

This then provides new binding sites for other bacteria - actinomycetes s

Question 8

What colonises the fusobacterium nucleatum

Answer 8

Actinomyces

Question 9

pH of sub gingival microbial niche

Answer 9

7.4- 7.8

Question 10

Does sub gingival plaque have saliva or GCF

Answer 10

GCF

Question 11

Features of gingival inflammation

Answer 11

Plaque accumulation, inflammation, high gcf flow, lower redox potential (less O2 available)

Question 12

Is gram +ve or -ve bacteria present in healthy gingiva

Answer 12

Gram +ve cocci

Question 13

Is gram +ve or -ve bacteria present in gingivitis

Answer 13

Half gram +ve

Question 14

What does a pocket depth greater than 3mm show

Answer 14

Apical migration of junctional epithelium- bone loss

Question 15

Is gram +ve or -ve bacteria present in periodontitis

Answer 15

Approx 75% gram -ve (obligate anaerobes) - fusobacterium nucleate, T. forsythia

Question 16

What bacteria makes up the red complex

Answer 16

T. denticola
T. forsythia
P. gingivalis

Question 17

Cells in periodontitis

Answer 17

Immune cells on right for inflammation, plasma cells, fibroblasts, JE is starting to be destroyed