Title: Chapter 19: Test Generator Questions
Course: DEH 2821 Medically-Compromised Patient

Q: Which one of the following is a hard deposit?
- Acquired pellicle
- Dental biofilm
- Material alba
- Food debris
- Dental calculus
A: Dental calculus

Q: The acquired pellicle forms on:
- restorations
- exposed tooth surfaces
- dental calculus
- dental crowns
- all of the above
A: all of the above

Q: After all external material has been removed from tooth surfaces, the acquired pellicle forms:
- within minutes
- within 1 hour
- within 8 hours
- within 24 hours
A: within minutes

Q: The significance of the acquired pellicle is that:
- it is protective
- it is a lubricant
- it provides a nidus for bacteria
- it is a mode of calculus attachment
- all of the above
A: all of the above

Q: Gram-positive cocci enter the bacterial biofilm in how many days?
- 1 to 2
- 4 to 7
- 10 to 14
- 14 to 21
A: 1 to 2

Q: When biofilm is left undisturbed on the tooth surface, gingivitis develops:
- within 8 hours
- within 24 hours
- within 48 hours
- in 2 to 3 weeks
A: in 2 to 3 weeks

Q: Biofilm that is located between the periodontal attachment and the gingival margin, within the sulcus, is called:
- supragingival biofilm
- gingival biofilm
- subgingival biofilm
- fissure biofilm
A: subgingival biofilm

Q: Biofilm occurs least frequently:
- on proximal surfaces
- at the gingival margin
- around the gingival third of the tooth
- on palatal surfaces of maxillary teeth
A: on palatal surfaces of maxillary teeth

Q: Calcified dental deposit is called:
- material alba
- plaque
- dental decay
- calculus
A: calculus

Q: The planktonic “free-floating” biofilm contains which of the following?
- epithelial cells
- platelets
- red blood cells
- white blood cells
A: white blood cells

Q: Critical pH for enamel demineralization averages:
- 6.2 to 7.0
- 6.0 to 6.7
- 4.5 to 5.5
- none of the above
A: 4.5 to 5.5

Q: The critical pH for root surface demineralization is approximately:
- 6.2 to 7.0
- 6.0 to 6.7
- 4.5 to 5.5
- none of the above
A: 6.0 to 6.7

Q: Your patient John informs you that he only drinks one can of soda all day because he sips it slowly throughout the day; during OHI you tell him:
- large amounts of sucrose eaten at mealtimes is more cariogenic
- small amounts of sucrose eaten at frequent intervals is less cariogenic
- small amounts of sucrose eaten at frequent intervals is more cariogenic
- none of the above
A: small amounts of sucrose eaten at frequent intervals is more cariogenic

Q: Which one of the following is a loosely adherent mass of bacteria and cellular debris and is white or grayish-white in appearance?
- Dental plaque
- Material alba
- Calculus
- Acquired pellicle
A: Material alba

Q: Which one of the following can be removed with a water spray or oral irrigator?
- Dental plaque
- Material alba
- Calculus
- Dental biofilm
A: Material alba