| Grade |
Degree of occlusal wear |
| 0 |
No visible facets in enamel: Occlusal/Incisal morphology intact |
| 1 |
Marked wear facets in enamel: Occlusal/Incisal morphology altered |
| 2 |
Wear into dentin: dentin exposed occlusally/incisally and/or adjacent tooth surface: occlusal/incisal morphology changed in shape with height reduction of tooth |
| 3 |
Extensive wear into dentin: larger dentin area(>2mm2) exposed occlusally/incisally and/or adjacent tooth surface; occlusal/incisal morphology totally lost locally or generally; substantial loos of crown height |
| 4 |
Wear into secondary dentin (verified by photographs) |
Note: √ the grade that is applicable