Fig. 6
From: Tensile testing of the mechanical behavior of the human periodontal ligament
Elastic modulus of the PDL. a E1 and E2 of central incisors; b E1 and E2 of lateral incisors; c average elastic modulus at different loading rates; d comparison of average elastic moduli among different root levels; e comparison of average elastic modulus between medial and distal directions; f comparison of average elastic modulus among the three samples. + symbols and vertical bars represent the means and standard deviations of the specimens’ values