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Quantitative affinity parameters of synthetic hydroxyapatite and enamel surfaces in vitro

机译：合成羟基磷灰石和体外搪瓷表面的定量亲和力参数

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Particulate synthetic hydroxyapatite (HAP) is rapidly gaining importance as a biomimetic agent in oral care products. The prerequisite for an adequate effect of the treatment is an efficient attachment of the HAP particles to the tooth substance. However, quantitative data about the interaction and affinity parameters involved are scarce. The authors used an in vitro approach with standardized bovine tooth enamel surfaces and aqueous dispersions of chemically pure synthetic HAP particles as a model system. Structural characterization of the HAP powder using high-resolution scanning electron microscopy (SEM) shows that the particles are micrometer-sized stable clusters of crystallites that closely resemble the structure of natural enamel. Using SEM image analysis, the authors investigated the influence of HAP particle concentration and particle size on the efficiency of attachment to bovine tooth enamel based on pure mineral-mineral interaction. The results show that both play an important role and can be tailored for optimizing the efficiency of corresponding oral care formulations. The results also reveal the presence of structures resembling mineral bridges at the interfaces between HAP particles and enamel that provide indications for possible interaction mechanisms.
机译：颗粒状合成羟基磷灰石（HAP）在口腔护理产品中迅速促使仿生剂的重要性。适当效果的前提是治疗的效果是将Hap颗粒与牙齿物质的有效连接。但是，关于涉及的交互和亲和参数的定量数据是稀缺的。作者使用了一种体外方法，具有标准化的牛牙釉质表面和化学纯合成Hap颗粒的水分散体作为模型系统。使用高分辨率扫描电子显微镜（SEM）的HAP粉末的结构表征表明颗粒是微米尺寸的微晶簇，其与天然珐琅的结构非常相似。使用SEM图像分析，作者研究了HAP颗粒浓度和粒度对基于纯矿物矿物相互作用的牛牙釉质的附着效率的影响。结果表明，两者都发挥着重要作用，可以根据优化对应口腔护理配方的效率量身定制。结果还揭示了在Hap颗粒和搪瓷之间的界面处具有类似矿物桥的结构的存在，该牙釉质为可能的相互作用机制提供适应症。

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