Table 2.
Number of incremental markings and enamel extension rate at the EDJ in the buccal enamel of the posterior lobe of a sheep M3.
| Landmarks | Distance to cervical enamel border measured along EDJ (μm) | Distance to cervically adjacent landmark line at EDJ (μm) | Increments between this and the preceding landmark | Cumulative increment count | Length of landmark line/secretory front (μm) | % of total increment number (cumulative count) | % of total crown height at EDJ (cumulative count) |
|---|---|---|---|---|---|---|---|
| Occlusal enamel tip | 29095.6 | 14219.0 | 0 | 0 | 0 | 0 | 0 |
| Line 1 | 14876.6 | 6507.4 | 130 | 130 | 3764.5 | 28.5 | 48.9 |
| Line 2 | 8369.2 | 3111.8 | 84 | 214 | 3252.2 | 46.8 | 71.2 |
| Line 3 | 5257.4 | 2092.4 | 67 | 281 | 2015.0 | 61.5 | 81.9 |
| Line 4 | 3165.0 | 1280.0 | 53 | 334 | 1926.0 | 73.1 | 89.1 |
| Line 5 | 1885.0 | 1431.1 | 51 | 385 | 1002.6 | 84.3 | 93.5 |
| Line 6 | 453.9 | 453.9 | 54 | 439 | 837.5 | 96.1 | 98.4 |
| Cervical enamel border | 0 | 0 | 18 | 457 | 0 | 100 | 100 |
Line = accentuated incremental (landmark) line.
EDJ, enamel–dentin junction.