分级结构类釉质氟磷灰石的原位仿生再矿化合成

摘要

The in situ regeneration of enamel-like hierarchical structures were carried out under biomimetic condition using etched enamel as the template. The morphology, chemical composition, mcriohardness, biocompatibility and mechanical properties of the remineralized layer were investigated by scanning electron microscopy( SEM) , energy dispersive spectroscopy ( EDS ) , X-ray diffraction ( XRD ) and Fourier transform infrared spectroscopy( FTIR) . Furthermore, the enamel layers remineralized under biomimetic conditions and hydrothermal condition were compared. The results showed that the structure of them were similar to that of the natural enamel prisms and interprisms, and the crystal composition were both mainly fluorapatite. However, the structures, morphology and microhardness of enamel-like hierarchical enamel layer were better than those of the enamel layer obtained under hydrothermal condition.%以酸蚀牙釉质为模板,在仿生条件下进行原位釉质再矿化,合成了具有分级结构的类釉质样晶体.利用扫描电子显微镜(SEM)、X射线衍射(XRD)、X射线能谱(EDS)和傅里叶变换红外光谱(FTIR)分析及机械性能检测等手段对再矿化层晶体的形貌、化学组成、硬度和生物相容性等性质进行了表征,并将其与水热条件下合成的类釉质样结构晶体进行比较.结果表明,2种方法均可获得类似于天然牙釉质釉柱及釉间柱样分级结构,所得晶体主要为氟磷灰石.在仿生条件下得到的类釉质晶体更接近于天然牙釉质釉柱及釉间柱样分级结构,在形貌、结构组成及硬度上均优于水热条件下得到的晶体.