Definitions

Question 1

Biofilm

Answer 1

Accumulation of bacteria on a solid surface in a fluid environment kept intact by extracellular polymers or matrix

Question 2

Acquired pellicle

Answer 2

Biofilm free of bacteria covering oral hard and soft tissues

Question 3

Dental plaque

Answer 3

Soft deposits that form biofilm adhering to tooth surface

Question 4

Calculus

Answer 4

Mineralized bacterial plaque

Question 5

Materia alba

Answer 5

Aggregates of bacteria and tissue cells that lack the organized structure of dental plaque

Question 6

Co-aggregation

Answer 6

Process through which the secondary colonizers adhere to primary colonizers via receptors (corn-cob like structures)

Question 7

Gingival recession

Answer 7

Apical shift of marginal gingiva beyond CEJ

Question 8

Mobility

Answer 8

horizontal or vertical displacement of a tooth

Question 9

Furcation

Answer 9

Anatomical area where roots divide

Question 10

Probing depth

Answer 10

Distance in mm from free gingival margin to base of sulcus/pocket

Question 11

Clinical attachment loss

Answer 11

Gingival recession plus probing or pocket depth