Table 2

Two-dimensional and three-dimensional enamel thickness measurements (mean) in fossil hominins and recent hominoids (ordered on three-dimensional relative enamel thickness).

H. sapiensaP. robustusA. africanusH. neanderthalenisbHylobates muelleric,dPongo pygmaeusc,ePan troglodytesc,eSymphalangus syndactylusc,dGorilla gorillac,e
three-dimensional sample size399929111226179
enamel volume (mm3)218.91557.51478.85225.4726.37197.91137.0062.29372.01
dentine volume (mm3)226.83507.60598.90345.6536.88336.05166.05119.601023.18
EDJ surface area (mm3)162.56311.80332.67211.6053.80199.75182.67116.21375.89
three-dimensional AET (mm)1.431.831.481.080.491.010.750.550.98
three-dimensional RET23.9723.2717.7015.5514.7214.4911.8011.159.77
Two-dimensional sample size25799421141401715
Enamel area (mm2)24.1944.7536.2021.974.4423.4214.637.3029.37
dentine area (mm2)38.7353.2352.2741.658.4750.9336.9518.5079.29
EDJ length (mm)19.6021.8722.4220.7510.1321.3419.4713.5328.25
two-dimensional AET (mm)1.222.031.631.060.441.100.750.541.04
two-dimensional RET20.0628.3822.7916.4415.2715.4913.2312.5811.68
  • a Two-dimensional data from Smith et al. (2006).

  • b Data from Olejniczak et al. (2008c).

  • c Three-dimensional data from Olejniczak et al. (2008b).

  • d Two-dimensional data from A. J. Olejniczak (2006, unpublished Ph.D. dissertation).

  • e Two-dimensional data from Smith et al. (2005).