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- W2340356990 abstract "BACKGROUND: When bone cement solidifies fast, the bone cement consistency will be decreased, resulting in difficulty in molding.OBJECTIVE: To test the performance of bone cement prepared with compound power containing α-tricalcium phosphate (α-TCP) and hydroxylapatite (HA) and hardening liquid containing chitosan and citric acid as well as gelatin.DESIGN, TIME AND SETTING: Open experiment, performed in the Laboratory of Department of Materials, Lanzhou Jiaotong University between March 2005 and August 2006.MATERIALS: α-TCP and HA were evenly mixed to prepare bone cement power. Different proportions of chitosan and gelatin were mixed with citric acid to produce hardening liquid. Then bone cement power and hardening liquid were mixed to form a paste, i.e., bone cement.METHODS: Setting time of bone cement was determined using a Vicat apparatus. The compressive strength of bone cement at different proportions was tested using MTS-810 material tester. After 2 months of physiological saline soaking at 37℃, the microstructure of solidified bone cement was observed using scanning electron microscope.MAIN OUTCOME MEASURES: Setting time and compressive strength of bone cement, pH value of hydrated bone cement and the microstructure.RESULTS: After adding chitosan and gelatin in the hardening liquid, the consistency of the concoction obviously increased, the setting time became a little longer and the water-resistance of samples was enhanced, therefore the samples could be easily molded. But the compressive strength of the bone cement decreased a little. The pH value of the hydrated bone cement increased gradually with time and was close to the pH value of physiological saline at hour 24. The compressive strength of theα-TCP/HA bone cement sample had changed with the content of chitosan and gelatin. The maximum strength of the bone cement was achieved at 24 hours and it almost did not change after 48 hours.CONCLUSION: α-TCP/HA bone cement prepared by adding chitosan and gelatin into the hardening liquid is free from the drawback of ceramic HA, including sintering and difficulties in shaping. It has the characteristics of simple-producing, easy application and low heat energy." @default.
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- W2340356990 date "2008-08-05" @default.
- W2340356990 modified "2023-09-23" @default.
- W2340356990 title "Performance of Calcium Phosphate Bone Cement Using Chitosan and Gelatin as Well as Citric Acid as Hardening Liquid" @default.
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