Periodontics and Endodontics Flashcards

Under the 2017 AAP/EFP classification, which interdental clinical attachment loss at the site of greatest loss indicates Stage III periodontitis?

Answer: 5 mm or more

Stage III and IV both require interdental CAL of 5 mm or more at the worst site, while Stage I is 1-2 mm and Stage II is 3-4 mm.

In periodontitis grading, a percentage bone loss divided by patient age greater than 1.0 corresponds to which grade?

Answer: Grade C

A bone loss/age ratio above 1.0 indicates rapid progression, which is Grade C.

A patient with Stage II periodontitis smokes 15 cigarettes per day. How does this risk factor modify the grade?

Answer: Shifts to Grade C

Smoking 10 or more cigarettes per day is a grade modifier that shifts the case to Grade C.

A 14-year-old has deep pockets and angular bone loss limited to the first molars and incisors with minimal plaque. What was this condition called under the 1999 classification?

Answer: Localized aggressive periodontitis

Molar-incisor pattern bone loss in adolescents was classified as localized aggressive periodontitis and is now described as a molar/incisor pattern of periodontitis.

Under the Glickman classification, a through-and-through furcation that is still covered by gingiva is which grade?

Answer: Grade III

Glickman Grade III is a through-and-through furcation hidden by soft tissue, and Grade IV is clinically visible because of recession.

Under the Miller index, a tooth that moves more than 1 mm horizontally and can be depressed vertically has which mobility class?

Answer: Class 3

Miller Class 3 mobility is more than 1 mm of movement in any direction and/or vertical depressibility.

Which bacterium is NOT part of Socransky's red complex?

Answer: Fusobacterium nucleatum

Fusobacterium nucleatum belongs to the orange complex and acts as a bridging organism between early and late colonizers.