Pathology · single question
CASE 3 — Same patient with GERD and generalized cupping on posterior teeth. What is the primary cause of the cupping?
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Correct answer: C. Erosion
- A. Bruxism causes attrition (flat facets), not cupping. Note: the source lists bruxism as answer D — bruxism is INCORRECT here; erosion (from GERD) is the answer.
- B. Attrition is tooth-to-tooth wear (bruxism); causes flat, faceted wear patterns — not cupping.
- C. Cupping/saucerization of the occlusal surfaces of posterior teeth is the pathognomonic sign of CHEMICAL EROSION. In this patient with GERD, gastric acid is the intrinsic acid source. The classic sign is restorations appearing to 'stand proud' above the surrounding eroded tooth surface.
- D. Abrasion is mechanical wear from external objects (toothbrush, abrasive food); causes notching/grooving, not cupping.