Abstract

Objective To study the causes and theoretical basis for good bone healing ability of magnetic Porous Ca3 (PO4) 2 ( MPTCP). Methods Seven MPTCP specimens with size of 2 cm × 1 cm × 0.5 cm were placed in the material physical system for detecting 42 times and the mean detection value was used to measure the MPTCP curve. The attachment 16451B of impedance spectrometer HP RLC was employed to measure dielectric spectroscopy and dielectric spectroscopy of MPTCP. Four-wire method was used to measure the impedance of MPTCP. Results The magnetic intensity changed rapidly when magnetic field was in a range of-10,000-10,000 Oe. The peak of dielectric spectroscopy and impedance of magnetic bioceramics was in the range of 103-104 Hz. When the external electromagnetic wave of frequency was ≤ 1 000 Hz, electrical impedance of MPTCP was large;while when the electromagnetic wave frequency was≥1 000 Hz, the impedance was relatively small and stable. Conclusion The environmental magnetic fields may change the magnetic and electric behavior of MPTCP and promote the biological healing, which may be the cause for the good bone healing ability of MPTCP. Key words: Fracture healing; Ceramics

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