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. 2006 Jan;208(1):125–138. doi: 10.1111/j.1469-7580.2006.00500.x

Table 2.

Adjusted crown formation time and extension in Macaca nemestrina

Shellis' Known
Spec. Cusp EDJ Time Rate Time Rate Diff. % Error
1 Metaconid 4210 228 18.46 1841 22.88  44 23.91
2 Protoconid 4689 326 14.38 2201 21.31 106 48.18
3 Paracone 5470 427 12.81 295 18.54 132 44.75
Protocone 5433 415 13.09 367 14.80  48 13.08
4a Metaconid 4280 366 11.69 285 15.02  81 28.42
Protoconid 6380 476 13.40 374 17.06 102 27.27
4b Paracone 5445 502 10.85 287 18.97 215 74.91
Protocone 6257 788 7.94 424 14.76 364 85.85
Metacone 5042 526 9.58 286 17.63 240 82.47
Hypocone 6268 609 10.29 426 14.71 183 42.96
5 Metaconid 4596 335 13.72 318 14.45  17 5.34
Protoconid 5603 466 12.02 378 14.82  88 23.28
Entoconid 3660 429 8.53 2332 15.71 196 84.12
Hypoconid 5091 447 11.39 399 12.76 48 12.03

Spec., specimen number as described in the text. Cusp, derived from first molars. EDJ, enamel–dentine junction length (µm), Shellis' values derived from the application of his formula using measurements from a minimum of four areas along the EDJ (see text for formula); Time, predicted formation time (days); Rate, average extension rate (µm day−1), determined by dividing EDJ by time. Known values derived from actual age at death, from which root formation was subtracted and prenatal time was added. Time, prenatal plus postnatal enamel formation (days); Rate, extension rate (µm day−1), determined by dividing EDJ by time. Diff., difference score, calculated by subtracting the actual crown formation time from the calculated formation time, % Error, difference score divided by the actual time × 100.

1

Incomplete crown.

2

Original estimate not adjusted due to lack of neonatal line.