Microbiology and Diet

Question 1

What are the steps in caries progression?

Answer 1

• adhesion
• survival & growth
• biofilm formation
• complex plaque formation
• acid production
• caries

Question 2

What microorganism is thought to cause caries?

Answer 2

streptococcus mutans

Question 3

What two key features enable cariogenic organisms to stick to enamel surfaces and autoaggregate, and to survive within an acidic environment?

Answer 3

• extracellular polysaccharides (form a sticky glue like substance that helps biofilm)
• synthesises enzymes that help to maintain the bacterial cell membrane integrity and metabolic function allowing them to thrive in acidic environment

Question 4

Name two systemic diseases that have been shown to be associated with periodontal biofilms:

Answer 4

• diabetes
• cardiovascular disease