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Board Exams MCQs on Odontogenic Infections – Oral and Maxillofacial Surgery

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Welcome to your Board Exams MCQs on Odontogenic Infections - Oral and Maxillofacial Surgery

A patient presents with an odontogenic infection involving the lateral pharyngeal space. On examination, the patient has marked trismus (restricted mouth opening). The trismus associated with infection of the lateral pharyngeal space is primarily due to irritation of which muscle?

Buccinator

Masseter

Lateral pterygoid

Medial pterygoid

Temporalis

None

A 12-year-old child presents with a hard, painless swelling of the mandibular body associated with a chronically infected first molar. Radiographic examination reveals a characteristic "onion-skin" periosteal bone formation. The diagnosis is Garre's osteomyelitis. Which of the following best describes this condition?

Chronic focal sclerosing and non-suppurative osteomyelitis

Chronic focal sclerosing and suppurative osteomyelitis

Characterized by suppuration and acute pain

Chronic diffuse sclerosing osteomyelitis

Acute suppurative osteomyelitis with sequestrum formation

None

A 45-year-old patient presents with a rapidly spreading bilateral infection involving the submandibular, sublingual, and submental spaces following an untreated mandibular molar infection. The patient has difficulty swallowing, drooling, and progressive elevation of the tongue. If left untreated, death in this condition is most commonly due to:

Sepsis

Respiratory obstruction

Cavernous sinus thrombosis

Carotid blow-out

Meningitis

None

During administration of a conventional inferior alveolar nerve block, the anesthetic solution is deposited within the pterygomandibular space. Knowledge of the boundaries of this space is essential to avoid complications. Which structure forms the roof of the pterygomandibular space?

Temporalis muscle

Medial pterygoid muscle

Cranial base

Lateral pterygoid muscle

Buccinator muscle

None

A patient with a neglected mandibular molar infection develops fever, dysphagia, neck stiffness, and swelling of the posterior pharyngeal wall. Imaging reveals a retropharyngeal space infection. In oral and maxillofacial surgery practice, retropharyngeal space infections most commonly result from the spread of:

Cervical tuberculosis

Meningoencephalitis

Mumps

Odontogenic infections

Acute tonsillitis

None

A patient presents with an odontogenic infection involving the masticatory space. Clinical examination reveals marked difficulty in opening the mouth due to spasm of the muscles of mastication. Which of the following is the distinguishing feature of a masticatory space infection?

Pain

Dysphagia

Trismus

Swelling

Fever

None

A patient with an odontogenic infection develops swelling that spreads along fascial planes rather than directly through adjacent tissues. During the spread of oral and maxillofacial infections, which anatomical structure acts as the greatest barrier to infection, often determining the direction and extent of spread?

Connective tissue

Epithelium

Muscle

Fascia

Periosteum

None

A 60-year-old patient who underwent radiotherapy for a mandibular squamous cell carcinoma presents months later with exposed necrotic bone that fails to heal. The underlying pathogenesis of osteoradionecrosis (ORN) is primarily related to radiation-induced damage to blood vessels, resulting in reduced blood supply to bone. This condition is mainly due to:

Infection

Endarteritis of blood vessels

Sepsis

None of the above

Acute osteomyelitis

None

A patient presents with a mandibular premolar infection. The infection perforates the buccal cortical plate above the attachment of the buccinator muscle. Based on the relationship of the root apex to the muscle attachment, where will the abscess most likely drain?

Buccal space

Masseteric space

Vestibular sulcus

Masticatory space

Submandibular space

None

10.

A patient with a mandibular molar infection develops swelling in one of the fascial spaces that is directly adjacent to the mandible. During evaluation of odontogenic infections, the surgeon reviews the primary mandibular fascial spaces. Which of the following is NOT considered a primary mandibular space?

Buccal

Sublingual

Submandibular

Pterygomandibular

Submental

None

Time's up

This quiz contains high-yield MCQs on odontogenic infections for FCPS, BDS, NLE, NEET MDS and dental BOARD examinations. Topics include the spread of odontogenic infections, fascial space infections, cellulitis, abscesses, Ludwig’s angina, microbiology, diagnosis, management, antibiotic therapy, and complications. These exam-focused questions are designed to strengthen concepts in Oral and Maxillofacial Surgery and improve performance in professional dental examinations.

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Board Exams MCQs on Odontogenic Infections – Oral and Maxillofacial Surgery

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Read Next

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