INBDE Oral Medicine and Oral Pathology 3

Question 1

A radiopaque lesion surrounded by a radiolucent halo is found at the root apex of a non-vital tooth in a 30-year-old. What is the most likely diagnosis?

Accepted Answer

Cementoblastoma

Answer

Cementoblastoma presents as a well-defined radiopaque mass fused to the root of a vital or non-vital tooth, surrounded by a thin radiolucent rim, and often causes expansion.

Question 2

Which type of oral cancer is most strongly associated with high-risk HPV infection, particularly HPV-16?

Accepted Answer

Oropharyngeal squamous cell carcinoma

Answer

High-risk HPV-16 is strongly associated with oropharyngeal squamous cell carcinoma (tonsils, base of tongue), particularly in younger non-smokers, and carries a better prognosis than HPV-negative tumors.

Question 3

A patient presents with a blue, dome-shaped, fluctuant lesion on the floor of the mouth that displaces the tongue. What is the most likely diagnosis?

Accepted Answer

Ranula

Answer

A ranula is a mucus-retention or extravasation phenomenon arising from the sublingual or submandibular salivary glands, presenting as a blue, fluctuant swelling on the floor of the mouth.

Question 4

The 'sunburst' or 'sunray' pattern on radiographs of the jaw in a teenager is most characteristic of which malignancy?

Accepted Answer

Osteosarcoma

Answer

Osteosarcoma classically produces a 'sunburst' or 'sunray' radiographic pattern due to periosteal reaction perpendicular to the cortex, often seen in adolescents and young adults.

Question 5

Which condition is characterized by intense burning of the oral mucosa with no identifiable clinical or laboratory abnormality and predominantly affects postmenopausal women?

Accepted Answer

Burning mouth syndrome

Answer

Burning mouth syndrome (BMS) is a chronic orofacial pain disorder with burning sensations but no identifiable mucosal lesions; it predominantly affects postmenopausal women and has multifactorial etiology.

INBDE - Integrated National Board Dental Exam Practice Test

INBDE - Integrated National Board Dental Exam Practice Test

INBDE Oral Medicine and Oral Pathology 3