Oral Pathology

• Retention Cyst of Maxillary Sinus: Characteristic X-ray feature is a dome-shaped/hemispherical radio-opacity in the antrum.

• Abfraction: Appears as a subgingival, deep, narrow "V" shaped notch in the cervical areas of teeth.

• Abrasion vs. Abfraction:

  • Abrasion: Commonly affects cuspids and bicuspids.

  • Abfraction: Affects only a single tooth (adjacent tooth is unaffected).

• Erosion (Gastric): Erosion due to gastric secretions is termed Perimolysis.