AAP stages and grades

Question 1

stage I perio

Answer 1

• 1-2 mm CAL
• bone loss - less than 15%
• no tooth loss

Question 2

stage II perio

Answer 2

• 3-4 mm CAL
• bone loss - 15-33%
• no tooth loss

Question 3

stage III perio

Answer 3

• greater than or equal to 5 mm CAL
• bone loss - extending to the middle third of root and beyond
• less than or equal to 4 teeth lost

Question 4

stage IV perio

Answer 4

• greater than or equal to 5 mm CAL
• bone loss - extending to middle third of root and beyond
• greater than or equal to 5 teeth lost

Question 5

grade A perio

Answer 5

• no attachment loss over 5 years
• <0.25 (% bone loss/age)
• non-smoker
• no diabetes

Question 6

grade B perio

Answer 6

• <2 mm loss over 5 years
• .25 to 1.0 (% bone loss/age)
• <10 cigarettes/day
• diabetes

Question 7

grade C perio

Answer 7

• greater than or equal to 2 mm loss over 5 years
• > 1.0 (% bone loss/age)
• greater than or equal to 10 cigarettes/day
• diabetes