背景:传统磷酸钙水泥存在力学强度差、注射性低和固化时间长等缺点,限制了其在临床上的应用。目的:回顾分子磷酸钙水泥性能的改善方法及临床应用。方法:通过检索Web of knowledge平台(1995至2011年)和中国期刊全文数据库(1995至2011年)有关磷酸钙水泥性能改善以及应用等方面相关文献,最终纳入34篇符合标准的文献进行综述。结果与结论:磷酸钙水泥具有良好的生物相容性,孔隙率,可塑性,无毒等优点,被广泛应用于药物载体,骨修复材料,骨肿瘤治疗等领域。为克服传统的磷酸钙水泥力学强度差,凝固时间长,注射性差等问题,目前主要通过调节磷酸钙水泥的固相成分、颗粒大小、添加有机溶剂等方法来提高磷酸钙水泥性能。
The biocompatibility and biodistribution of magnetic nanoparticles(MNPs)in vivo are essential to ensure their safely clinical application.We have studied these aspects with our 3-aminopropyltriethoxysilanecoated magnetic nanoparticles(APTS-MNPs)formulation,which can be used as magnetic induction hyperthermia media.Changes in tissue iron levels were analyzed after intraperitoneal injection of APTS-MNPs to ICR mice.Liver and kidney functions were tested.Heart,liver,spleen,lung,kidney,testis,and brain were sectioned for pathological analysis.Biodistribution of iron in various body tissues changed with time but greater fraction of the injected iron localized in the liver and spleen than in other tissues.Serum showed an increase in AST and LDH following APTS-MNPs injection.Histological analyses of selected tissues showed no obvious abnormal changes.In conclusion,APTS-MNPs did not cause continuing changes in the liver and kidney function and thus can be safely used for in vivo application.
