DDS Periodontics

Question 1

Which fibers of the periodontal ligament embed directly into the cementum and alveolar bone?

Accepted Answer

Sharpey's fibers

Answer

Elastic fibers

Answer

Oxytalan fibers

Answer

Reticular fibers

Question 2

What is the accepted normal sulcus probing depth in a clinically healthy periodontium?

Accepted Answer

1–3 mm

Answer

0–1 mm

Answer

4–5 mm

Answer

6–7 mm

Question 3

In a healthy periodontium, the apical termination of the junctional epithelium coincides with the:

Accepted Answer

Cemento-enamel junction (CEJ)

Answer

Alveolar crest

Answer

Mid-root cementum

Answer

Free gingival margin

Question 4

According to Hamp's furcation classification, Class II involvement is defined as:

Accepted Answer

Horizontal loss exceeding one-third the width but not encompassing the total width

Answer

Horizontal loss less than one-third the width of the tooth

Answer

Horizontal loss encompassing the total width of the furcation area

Answer

Vertical bone loss greater than 4 mm in the furcation

Question 5

The 'biologic width' of the periodontium comprises which two structures?

Accepted Answer

Junctional epithelium and supracrestal connective tissue attachment

Answer

Sulcus depth and free gingiva

Answer

Alveolar bone and periodontal ligament

Answer

Free and attached gingiva

Question 6

Which pattern(s) of alveolar bone loss can occur in periodontitis?

Accepted Answer

Both horizontal and vertical bone loss

Answer

Horizontal bone loss only

Answer

Vertical bone loss only

Answer

Periodontitis does not cause bone loss

Question 7

Which cell type is primarily responsible for alveolar bone resorption in periodontitis?

Accepted Answer

Osteoclasts

Answer

Osteoblasts

Answer

Fibroblasts

Answer

Cementoblasts