Table 2.

Ordinal scale used for grading severity of dental erosion on buccal and lingual surfaces of maxillary anterior teeth [25].

Grade	Criteria
0	No visible changes, developmental structures remain, macromorphology intact.
1	Smoothened enamel, developmental structures have totally or partially vanished. Enamel surface is shiny, matt, irregular, “melted,” rounded or flat, and macromorphology generally intact.
2	Enamel surface as described in grade 1. Macromorphology clearly changed, facetting or concavity formation within the enamel, no dentinal exposure.
3	Enamel surface as described in grades 1 and 2. Macromorphology greatly changed (close to dentinal exposure of large surfaces) or dentin surface exposed by ≤1/3.
4	Enamel surface as described in grades 1, 2 and 3. Dentin surface exposed by >1/3 or pulp visible through the dentin.

Note: approximal erosion, presence of “shoulder” and “cuppings” should be recorded.