A patient eats about five lemons per day. Clinically you observe tooth-surface loss. You would expect to see ALL of the following EXCEPT:

Correct answer: C. Abfraction

• A. Abrasion is wear from a foreign object/habit (e.g., aggressive toothbrushing); it can also be present.
• B. Attrition is tooth-to-tooth wear (e.g., from bruxism); it can coexist and may be visible in this patient.
• C. Correct (the EXCEPT). Abfraction is the theorized loss of cervical tooth structure from OCCLUSAL FLEXURE/stress, not acid. It is the wear type LEAST tied to an acidic diet and is the one you would not attribute to the lemons — making it the correct 'except' answer.
• D. Erosion is chemical dissolution of enamel by acid — exactly what daily lemon (citric acid) consumption causes. You DO see this.