A patient presents with erosion that most likely comes from vomiting rather than alcohol use — what is the most likely cause of erosion?

Correct answer: D. Vomiting (chronic self-induced vomiting)

• A. Aging alone does not cause the pattern of erosion described — active vomiting is the cause.
• B. The patient quit alcohol years ago — ongoing erosion is more likely from continued vomiting than from previously ceased alcohol use.
• C. The question asks to distinguish the MORE LIKELY cause — ongoing vomiting is the primary active cause.
• D. In a patient with a history of chronic vomiting (BULIMIA or chronic GERD) who also has a history of past alcohol use but has quit for several years, the CURRENT erosion pattern is most likely from VOMITING. Vomiting introduces gastric acid (pH ~2) onto palatal surfaces of maxillary teeth, causing characteristic LINGUAL/PALATAL erosion of maxillary anterior teeth. Alcohol-related erosion typically involves acidic beverages — if the patient quit alcohol years ago, ongoing vomiting is the more likely CURRENT cause.