Doctor of Dental Surgery MCQ Flashcards

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

Answer: Sjögren syndrome

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

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

Answer: Burnout

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.

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

Answer: Periodontal Disease Index (PDI)

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

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

Answer: Ranula

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.

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

Answer: Chronological hypoplasia

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

Which articulator type is required to accurately reproduce eccentric jaw movements using individual patient records?

Answer: Fully adjustable articulator

A fully adjustable (arcon) articulator accepts individual pantographic or stereographic records and replicates the exact condylar guidance and Bennett angle of a specific patient.

A dentist notices gingival fibromatosis in a patient taking which medication?

Answer: Phenytoin

Phenytoin (Dilantin), an anticonvulsant, is one of the classic causes of drug-induced gingival overgrowth (fibromatosis) along with cyclosporine and calcium channel blockers.