| Teeth | With wear facets n [median] (%) | No wear facets n [median] (%) | Teeth examined |
| With NCCLS | 623 [2.1] (78) | 178 [0.60] (22) | 801 |
| No NCCLs | 138 [0.8] (2.4) | 5591 [18.95] (96) | 5828 |
| Total teeth examined | 761 | 5769 | 6629 |
| Statistical analysis | Chi square = 2908; df = 1; p < 0.0001 |
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