09/24 - Epidemiology of Periodontal Health and Disease

Question 1

What is the definition of epidemiology?

Answer 1

study of disease origin and spread and pattern of disease development

Question 2

What is the difference between prevalence and incidence?

Answer 2

• PREVALENCE: the number of cases of a disease or condition per population at risk at a particular point in time
• INCIDENCE: the number of new cases of a disease or condition over a specified period of time

Question 3

Is gingival inflammation more common in males or females?

Answer 3

males

Question 4

What is the CPITN? What is it used for?

Answer 4

• Community Periodontal Index of Treatment Needs
• can be used as part of a global surveillance system to compare periodontal health in differing countries; provides information concerning the type of disease and therefore the extent of therapy

Question 5

How does the coding work for CPITN?

Answer 5

• the mouth is divided into sextants defined by tooth number

- index teeth in each sextent are probed and pocket depth, subgingival calculus, and BOP is determined

Question 6

What are the index teeth for adults >20 years?

Answer 6

2, 3, 8, 14, 15

31, 30, 24, 19, 18

Question 7

What do the codes 0, 1, 2, 3, and 4 in CPITN stand for?

Answer 7

• 0: healthy
• 1: bleeding observed after probing
• 2: calculus detected during probing
• 3: pocket 4-5 mm
• 4: pocket 6 mm or more

Question 8

American males ages 35-44 recorded the largest number of CPITN code 4 in the world. What is this code?

Answer 8

pocket 6 mm or more

Question 9

Approximately what % of Americans are affected by advanced periodontal disease (>5 mm pocket)?

Answer 9

13%

Question 10

Which gender has more attachment loss?

Answer 10

male

Question 11

Is localized or generalized aggressive periodontitis more common?

Answer 11

localized

Question 12

What % of adults has moderate chronic periodontitis? What % of seniors (age 65+) has moderate chronic periodontitis?

Answer 12

• 20%

- 50%

Question 13

Is localized aggressive periodontitis more common in Caucasians or African Americans? What is the prevalence of generalized?

Answer 13

• African Americans

- 0.13%