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Scoring criteria used for the evaluation of SEM images.
| Grade | Status |
|---|---|
| 0 | Enamel surface remained perfectly intact with no grooves, pits, and porosity |
| 1 | Presence of surface irregularities on enamel surface, without demineralization of prismatic and/or |
| interprismatic enamel | |
| 2 | Presence of wrinkles and demineralization of prismatic/interprismatic enamel |
| 3 | Diffuse demineralization involved the rod core, with decomposition of morphology of prism |
