AGD Periodontics and Gum Disease 5

Question 1

In the 2017 classification system, Grade C periodontitis (rapid progression) is indicated by evidence of:

Accepted Answer

Bone loss exceeding 2% per year or heavy biofilm inconsistent with the destruction observed

Answer

Grade C uses primary criteria such as bone loss >2% per year or the presence of heavy risk factors (smoking ≥10 cigs/day, HbA1c ≥7%) and secondary criteria of destruction inconsistent with biofilm levels.

Question 2

Which of the following best describes the rationale for placing a resorbable membrane versus a non-resorbable membrane in GTR?

Accepted Answer

Non-resorbable membranes require a second surgery for removal but may offer superior space maintenance

Answer

Non-resorbable membranes (e.g., expanded PTFE) require removal at a second surgery but can provide more predictable space maintenance; resorbable membranes eliminate the second surgery at the cost of variable resorption rates.

Question 3

Necrotizing ulcerative gingivitis (NUG) is distinguished from other forms of gingivitis by the presence of:

Accepted Answer

Interproximal necrosis, pseudomembrane, and fetid odor without attachment loss

Answer

NUG presents with punched-out interdental papillae covered by a gray pseudomembrane, spontaneous bleeding, fetid odor, and pain but no attachment loss (unlike necrotizing periodontitis).

Question 4

Platelet-rich fibrin (PRF) enhances periodontal wound healing primarily by:

Accepted Answer

Releasing autologous growth factors (PDGF, VEGF, TGF-β) that stimulate cell proliferation and angiogenesis

Answer

PRF is an autologous fibrin matrix rich in platelets and leukocytes that releases growth factors promoting angiogenesis, cell migration, and tissue regeneration at the wound site.

Question 5

Which of the following best describes a one-wall intrabony defect?

Accepted Answer

Only one remaining bony wall exists adjacent to the defect

Answer

A one-wall defect has only one remaining bone wall (plus the root surface), making it the least favorable for regeneration because of the limited bony envelope.

(AGD) Academy of General Dentistry Certification Practice Test

(AGD) Academy of General Dentistry Certification Practice Test

AGD Periodontics and Gum Disease 5