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Table 1 Typical compositional values of the inorganic phase of adult human calcified tissues [182]

From: Bioactive calcium phosphate materials and applications in bone regeneration

Composition Enamel Dentin Bone Hydroxyapatite
Calcium [wt.%] 36.5 35.1 34.8 39.6
Phosphorus [wt.%] 17.7 16.9 15.2 18.5
Ca/P (molar ratio) 1.63 1.61 1.71 1.67
Sodium [wt.%] 0.5 0.6 0.9
Magnesium [wt.%] 0.44 1.26 0.72
Potassium [wt.%] 0.08 0.05 0.03
Carbonate [wt.%] 3.5 5.6 7.4
Fluoride [wt.%] 0.01 0.06 0.03
Chloride [wt.%] 0.30 0.01 0.13
Pyrophosphate [wt.%] 0.022 0.10 0.07
Total inorganic [wt.%] 97 70 65 100
Total organic [wt.%] 1.5 20 25
Water [wt.%] 1.5 10 10
Ignition products (800 °C) β-TCP + HAP β-TCP + HAP HAP + CaO HAP
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