INBDE Periodontics 3

Question 1

Which type of bone defect has the best prognosis for regeneration?

Accepted Answer

Three-wall (intrabony) defect

Answer

Three-wall intrabony defects have the best regenerative prognosis because three bony walls provide maximum blood supply, stability, and a scaffold for regeneration.

Question 2

Which periodontal classification was adopted by the AAP/EFP World Workshop in 2017?

Accepted Answer

Stage and Grade classification

Answer

The 2017 AAP/EFP World Workshop introduced the Stage (I–IV) and Grade (A–C) classification system to replace the previous aggressive/chronic periodontitis terminology.

Question 3

Guided tissue regeneration (GTR) works by:

Accepted Answer

Excluding epithelium and allowing periodontal ligament cells to repopulate the root surface

Answer

GTR uses barrier membranes to prevent fast-growing epithelial and gingival connective tissue cells from occupying the defect space, allowing slower PDL and bone cells to regenerate.

Question 4

Necrotizing ulcerative gingivitis (NUG) is characterized by:

Accepted Answer

Punched-out interdental papillae, pseudomembrane, and fetid breath

Answer

NUG presents with necrosis and ulceration of interdental papillae (giving a 'punched-out' appearance), a gray pseudomembrane, fetid breath, and pain.

Question 5

Which systemic disease is associated with cyclosporine-induced gingival overgrowth?

Accepted Answer

Organ transplantation

Answer

Cyclosporine is an immunosuppressant used in organ transplant patients; it causes gingival overgrowth in about 25–30% of patients through altered fibroblast metabolism.

INBDE - Integrated National Board Dental Exam Practice Test

INBDE - Integrated National Board Dental Exam Practice Test

INBDE Periodontics 3