Skip to main content
. Author manuscript; available in PMC: 2011 Sep 1.
Published in final edited form as: Biomaterials. 2010 Jun 11;31(25):6635–6646. doi: 10.1016/j.biomaterials.2010.05.024

Table 1.

Reduced Elastic Modulus and Hardness values using Micro and Nanoindentation

Microindentation data illustrating average hardness values of tissues and respective attachment sites. The asterisks indicate significant differences in hardness values of PDL-alveolar bone (PDL-AB), alveolar bone (AB), and tubular dentin relative to cementum and PDL-cementum (PDL-C) enthesis. Table also includes ranges of reduced elastic modulus and hardness values using nanoindentation technique under wet conditions. These values are representative of heterogeneity of respective mineralized tissues and their attachment sites within the bone-PDL-cementum complex.

Micro/Nanoindentation Reduced Elastic Modulus ‘Er’ (GPa) Hardness ‘H’(GPa)
Bone PDL-AB PDL-C Cementum Tubular Dentin Bone PDL-AB PDL-C Cementum Tubular Dentin
Microindentation (DRY) 0.56 ± 0.1* 0.42 ± 0.1* 0.5 ± 0.2 0.5 ± 0.1 0.64 ± 0.1*
Nanoindentation (WET) 0.2–9.6 0.1–1.0 0.1–0.6 1.1–8.3 10–25 0.01–0.15 0.01–0.03 0.01–0.02 0.014–0.19 0.3–0.9
*

Significant difference (P < 0.05) with respect to PDL-C enthesis site and cementum