DDS Doctor of Dental Surgery MCQ 5

Question 1

Which condition is characterized by bilateral enlargement of the parotid glands and keratoconjunctivitis sicca (dry eyes)?

Accepted Answer

Sjögren syndrome

Answer

Sjögren syndrome is an autoimmune exocrinopathy featuring bilateral parotid enlargement, xerostomia, and keratoconjunctivitis sicca due to lymphocytic infiltration of exocrine glands.

Question 2

When using the 'lost wax' technique in dental casting, the wax is eliminated during which step?

Accepted Answer

Burnout

Answer

During burnout, the invested ring is heated in a furnace to completely eliminate (burn out) the wax pattern, creating a mold space for the molten metal.

Question 3

Which index measures the severity of periodontal disease by assessing loss of attachment and bone level?

Accepted Answer

Periodontal Disease Index (PDI)

Answer

The Periodontal Disease Index (PDI) evaluates gingival inflammation plus sulcus depth and attachment level, reflecting both tissue and bone changes.

Question 4

A patient presents with painless, bluish swelling on the floor of the mouth that fluctuates. The most likely diagnosis is:

Accepted Answer

Ranula

Answer

A ranula is a mucous retention phenomenon or extravasation cyst arising from the sublingual gland, presenting as a bluish, fluctuant swelling on the floor of the mouth.

Question 5

Which enamel developmental defect results from high fevers during amelogenesis and appears as horizontal lines across affected teeth?

Accepted Answer

Chronological hypoplasia

Answer

Chronological (systemic) hypoplasia results from systemic disturbances (fever, illness, malnutrition) during amelogenesis, producing horizontal bands across the affected dentition.

DDS - Doctor of Dental Surgery Practice Test

DDS - Doctor of Dental Surgery Practice Test

DDS Doctor of Dental Surgery MCQ 5