Doctor of Dental Surgery MCQ Flashcards

Which nerve provides sensory innervation to the mandibular anterior teeth?

Answer: Incisive nerve

The incisive nerve, a terminal branch of the inferior alveolar nerve, innervates the mandibular anterior teeth and premolars.

A patient presents with a 'moth-eaten' pattern of bone destruction on radiograph. This appearance is most characteristic of which condition?

Answer: Osteomyelitis

Osteomyelitis classically produces a 'moth-eaten' pattern of bone destruction due to diffuse infiltration by the infectious process.

Which salivary gland produces the highest proportion of serous secretion?

Answer: Parotid gland

The parotid gland is purely serous and produces approximately 25% of total saliva but nearly all serous secretion.

During a maxillary sinus lift procedure, which vessel is most commonly encountered and must be avoided?

Answer: Posterior superior alveolar artery

The posterior superior alveolar artery courses through the lateral sinus wall and is the vessel most frequently encountered during sinus lift procedures.

Which class of antibiotics works by inhibiting bacterial cell wall synthesis by binding penicillin-binding proteins?

Answer: Beta-lactams

Beta-lactam antibiotics (penicillins, cephalosporins) inhibit transpeptidases (penicillin-binding proteins) needed for peptidoglycan cross-linking in the bacterial cell wall.

A patient on warfarin therapy requires a tooth extraction. The target INR range to proceed safely is generally:

Answer: 2.0–3.5

Current evidence supports proceeding with simple extractions when INR is within the therapeutic range of 2.0–3.5 without altering anticoagulation therapy.

The Angle Class II, Division 2 malocclusion is characterized by which combination of features?

Answer: Retroclined maxillary central incisors and distal molar relationship

Class II Division 2 features a distal molar relationship with retroclined (not protruded) maxillary central incisors and a deep overbite.