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. Author manuscript; available in PMC: 2009 Nov 1.
Published in final edited form as: Dent Mater. 2008 Apr 23;24(11):1477–1485. doi: 10.1016/j.dental.2008.03.007

Table 1.

Mechanical properties of the enamel and selected restorative materials obtained from the indentation analyses. Values presented represent the mean.

Material HVc (GPa) E (GPa) Kc (Mpa*m0.5)b B (µm−1)

Human Enamel (young)
   Inner 3.1 75 0.88 305
   Middle 3.5 82 0.88 375
   Outer 4.1 87 0.95 393
Human Enamel (old)
   Inner 3.0 79 0.88 313
   Middle 3.4 90 0.73 582
   Outer 4.0 100 0.67 897
Micaceous Glass Ceramicsa
   Fine (d=1.1 µm) 4.2 71 1.04 271
   Medium-fine (d=1.8 µm) 3.6 70 1.18 180
   Medium (d=3.7 µm) 3.4 68 1.31 135
   Coarse (d=10 µm) 2.7 50 1.65 49
   Cmacor glass (d=15 µm) 1.8 64 1.50 51
Feldspathic Porcelainsa
   Leucite Body 5.6 67 1.14 288
   Leucite Incisal 5.3 65 1.26 216
   Leucite Finesse 5.6 70 0.99 402
   Leucite Empress 5.6 67 1.03 353
   Nepheline syenite 6.3 70 1.19 310
Dissimilarsa
   Zirconia 13.9 210 4.90 122
   Glass-infused alumina 11.7 250 3.10 304
   Glass-ceramic 5.5 104 2.80 73
a

from Quinn et al, [18]

b

values obtained using indentation and represent apparent toughness (Kc(app))