NBDHE NBDHE Periodontal Assessment and Treatment 4

Question 1

Which of the following best describes 'junctional epithelium'?

Accepted Answer

Non-keratinized epithelium that attaches the gingiva to the tooth surface

Answer

Junctional epithelium is a non-keratinized epithelium that forms the epithelial attachment at the base of the gingival sulcus, attaching to the tooth via hemidesmosomes.

Question 2

During a periodontal examination, a patient shows 4 mm probing depths with no bone loss radiographically and bleeding on probing. This finding is consistent with:

Accepted Answer

Plaque-induced gingivitis on an intact periodontium

Answer

Probing depths of up to 4 mm with bleeding on probing but no radiographic bone loss or CAL indicates plaque-induced gingivitis, which is reversible with proper plaque control.

Question 3

The principle behind guided tissue regeneration (GTR) is to:

Accepted Answer

Use a membrane to exclude epithelium and allow periodontal ligament cells to repopulate the defect

Answer

GTR uses barrier membranes to exclude fast-growing epithelium and connective tissue, allowing slower-growing periodontal ligament and bone cells to repopulate the defect for true regeneration.

Question 4

Which oral hygiene aid is most recommended for cleaning under a fixed partial denture (bridge) pontic area?

Accepted Answer

Superfloss or floss threader

Answer

Superfloss or a floss threader allows patients to thread floss under the pontic of a fixed bridge to clean the gingival surface of the pontic and adjacent abutment margins.

Question 5

What is 'biologic width' and why is it clinically significant in restorative dentistry?

Accepted Answer

The combined dimension of junctional epithelium and connective tissue attachment, which must not be violated by restorative margins

Answer

Biologic width (~2 mm) is the combined height of junctional epithelium (~1 mm) and supracrestal connective tissue (~1 mm); placing restorative margins within it causes chronic inflammation and bone loss.

NBDHE Test Practice Test

NBDHE Test Practice Test

NBDHE NBDHE Periodontal Assessment and Treatment 4