ABP Periodontal Anatomy 3

Question 1

Which cells are primarily responsible for maintaining and remodeling the alveolar bone proper (bundle bone) adjacent to the PDL?

Accepted Answer

Osteoblasts and osteoclasts

Answer

Alveolar bone remodeling is carried out by coordinated activity of osteoblasts (bone formation) and osteoclasts (bone resorption), regulated by local and systemic signals.

Question 2

The mucogingival junction (MGJ) in the maxillary anterior region is identified clinically by which characteristic?

Accepted Answer

Color change from pale pink to darker red/pink alveolar mucosa

Answer

The MGJ is recognized by a color change from the pale, stippled keratinized gingiva to the redder, non-keratinized, movable alveolar mucosa.

Question 3

Sharpey's fibers are the embedded portions of which periodontal structure?

Accepted Answer

PDL principal fibers (extrinsic fibers)

Answer

Sharpey's fibers are the mineralized ends of principal PDL collagen fiber bundles that insert into both cementum and alveolar bone proper.

Question 4

Which zone of the junctional epithelium directly contacts the tooth surface via hemidesmosomes and a basal lamina?

Accepted Answer

Inner layer facing the tooth

Answer

The inner layer (dentally facing cells) of the junctional epithelium attaches to enamel, cementum, or dentin via hemidesmosomes and an internal basal lamina.

Question 5

Which artery is the primary blood supply to the buccal gingiva of the maxillary posterior teeth?

Accepted Answer

Posterior superior alveolar artery

Answer

The posterior superior alveolar artery (branch of the maxillary artery) supplies the buccal gingiva and alveolar mucosa of the maxillary posterior region.

(ABP) American Board of Periodontology Practice Test

(ABP) American Board of Periodontology Practice Test

ABP Periodontal Anatomy 3