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. Author manuscript; available in PMC: 2007 Mar 29.
Published in final edited form as: Acta Biomater. 2005 Dec 9;2(1):85–94. doi: 10.1016/j.actbio.2005.10.004

Table 4.

Comparison of the ion activity product (IAP; mean ± standard deviation (SD)) and the thermodynamic stability* (ΔGo, mean ± SD) of the solutions containing the maximum concentrations of Ca and PO4 released from Zr-ACP/EBPADMA/TEGDMA/HEMA/MEP composites. Negative ΔGo value indicates solution supersaturated with respect to stoichiometric hydroxyapatite, Ca10(OH)2(PO4)6. Number of repetitive experiments in each group n ≥ 4.

Resin IAP ΔGo (kJ/mol)
unmilled ACP milled ACP unmilled ACP milled ACP
ETHMI 103.59 ± 0.76 106.63 ± 1.27 − (4.35 ± 0.21) − (3.42 ± 0.39)
ETHMII 102.51 ± 0.72 103.68 ± 1.19 − (4.65 ± 0.22) − (4.32 ± 0.36)
ETHMIII 102.05 ± 0.74 106.63 ± 0.68 − (4.67 ± 0.23) − (4.79 ± 0.20)