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Abstract  

A microcalorimeter (Setaram c-80) was used to study the thermokinetics of the hydration process of calcium phosphate cement (CPC), a biocompatible biomaterial used in bone repair. The hydration enthalpy was determined to be 35.8 J g–1 at 37.0°C when up to 80 mg CPC was dissolved in 2 mL of citric buffer. In the present study, parameters related to time constants of the calorimeter were obtained by fitting the recorded thermal curves with the function θ=Ae–?t(1– e–?2t). The real thermogenetic curves were then retrieved with Tian function and the transformation rate of the hydration process of CPC was found to follow the equation α=1–[1–(0.0075t)3]3. The microstructures of the hydrated CPC were examined by scanning electron microscopy. The nano-scale flake microstructures are due to crystallization of calcium phosphate and they could contribute to the good biocompatibility and high bioactivity.

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laminar hooks, sublaminar wires, or calcium phosphate cement: a comparative analysis. Spine (Phila Pa 1976), 2004, 29 , 1723–1730. Dvorak M. F. Pedicle screw motion in the osteoporotic

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Chen HW, Huang HB, Zhao GS, Ji XR. Treatment of chronic osteomyelitis with antibiotic-loaded calcium phosphate cement. Zhongguo Gu Shang 21 , 79–81 (2008). Ji X.R. Treatment of

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Magyar Sebészet
Authors: János Varga, László Janovák, Erika Varga, Gábor Erős, Imre Dékány, and Lajos Kemény

Poly(acrylic acid) modified calcium phosphate cements: the effect of the composition of the cement powder and of the molecular weight and concentration of the polymeric acid J Mater Sci Mater Med 18

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release from injectable PolyDL-lactic-coglycolic acid calcium phosphate cement composites J.Bone Joint Surg. 85-A 75 – 81 . [49]. R. Langer J. P. Vacanti 1993 Tissue engineering Science 260 920 – 927 . [50]. L. G. Griffith G

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calcium phosphate cement composites. J. Bone Joint Surg., 2003, 85-A , 75–81. Padron N. T. BMP-2 release from injectable PolyDL-lactic-co-glycolic acid calcium phosphate cement

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.11.027 . 2. Gao , WY , Wang , YW , Dong , LM , Yu , ZW 2006 Thermokinetic analysis of the hydration process of calcium phosphate cement . J Therm Anal Calorim. 85 : 785 – 789 10.1007/s10973-005-7433-x

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