Table 1.
DMFT Index, Smith and Knight’s Tooth Wear Index and Basic Erosive Wear Examination Index
| DMFT INDEX | SMITH & KNIGHT TWI | BEWE INDEX | |||
|---|---|---|---|---|---|
| CODE | CONDITION | GRADE | CONDITION | GRADE | CONDITION |
| 0 | Sound | 0 | No loss of enamel surface on B/L/O/I, no change in contour on Cervical | 0 | No erosive Tooth Wear |
| 1 | Decayed | 1 | Loss of enamel on B/L/O/I, minimal loss of contour on Cervical | 1 | Initial loss of surface texture (enamel) |
| 2 | Filled, with decay | ||||
| 3 | Filled, without decay | ||||
| 4 | Missing due to caries | 2 | Loss of enamel exposing dentine <1/3 of the B/L/O/I, Defect less 1 mm deep on Cervical | 2 | Distinct defect, hard tissue <50% of the surface area (dentine) |
| 5 | Missing, any other reason | ||||
| 6 | Fissure Sealant | 3 | Loss of enamel exposing dentine >1/3 of B/L/O/I, Defect 1–2 mm deep on Cervical | 3 | Hard tissue loss > 50% of the surface area |
| 7 | Bridge abutment, crown or veneer/implant | ||||
| 8 | Unerupted tooth | 4 | Complete loss of enamel or pulp exposure on B/L/O/I, defect >2 mm deep Cervical | ||
| T | Trauma | ||||