Question: A patient is evaluated for a painful lateral incisor. Extensive dental caries are identified and the tooth is rendered nonviable. A panoramic dental X-ray is obtained that reveals a periapical cyst. From what epithelial cell rest is this cyst thought to originate?

[Answer will be posted with next week's new question]

Answer to last week's question, "Skull Base Foramina" (March 5, 2018)

Middle meningeal artery.