PHASE 2

Question 1

What is the life cycle of plaque?

Question 2

How old is new plaque? How old is mature plaque?

Question 3

Name two ions that help with formation of calculus.

Question 4

What type of mouth rinse cause brown stain?

Answer 4

Chlorhexidine

Question 5

Should stain be removed prior to fluoride treatment?

Question 6

What type of strokes should be used during polishing?

Question 7

When does calculus form?

Question 8

What colour is supragingival and subgingival calculus?

Question 9

What is material alba?

Question 10

What is acquired pellicle?

Answer 10

An acellular layer that forms over the tooth (30-90 minutes after TB)

Question 11

List characteristics of abrasive agents

Question 12

Factors Affecting Plaque Accumulation

Answer 12

• crowded teeth
• rough surfaces
• out of occlusion

Question 13

What is the different pH balanced of plaque?

Question 14

List the different types of pellicles

Answer 14

• surface pellicle
• stained and unstained

• subsurface pellicle

Question 15

Define UNSTAINED Surface Pellicle

Answer 15

• clear, translucent, insoluble
• appears thin with pale staining

Question 16

Define STAINED Surface Pellicle

Answer 16

Brown, greyish extrinsic stain

Question 17

Define SUBSURFACE Pellicle

Answer 17

• embedded into the tooth structure
• surface pellicle is continuous with subsurface

Question 18

What is the significance of Pellicle?

Answer 18

• it provides a barrier against acids
• aids adherence of microorganisms