Abstract

Hydroxyapatite is the most important bio ceramic, due to its structure and chemical composition which is similar to bone and teeth. In this study, hydroxyapatite nanoparticles were prepared from natural teeth in two stages. Initially, the nano HA particles was performed by whole tooth and in the second stage, the tooth was divided into dentine and root and HA nanoparticles were prepared from both portions of teeth. At first, freshly extracted human teeth both (whole tooth and dentine and root) were calcined at 850°C and then, the effects of stirring time, surfactant and different temperatures were investigated. The XRD results confirmed that, the existence of hydroxyapatite phase in all samples. The phosphate bonding groups of \({\text{PO}}_{4}^{{3 - }}\) at 1470 and 669 cm^–1 was confirmed by FTIR results. The FESEM results showed that, hydroxyapatite nano particle with the range of 29–46 nm at stirring time of 36 h with the addition of CTAB as a surfactant at 850°C was obtained without agglomeration and good dispersion.

中文翻译：

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天然牙羟基磷灰石纳米颗粒的制备

摘要

羟基磷灰石是最重要的生物陶瓷，其结构和化学成分与骨骼和牙齿相似。在这项研究中，羟基磷灰石纳米颗粒是从天然牙齿中分两个阶段制备的。最初，纳米HA颗粒是在整个牙齿上进行的，在第二阶段，将牙齿分为牙本质和牙根，并从牙齿的两个部分制备HA纳米颗粒。首先，将刚拔出的人牙（全牙、牙本质和牙根）在 850°C 下煅烧，然后研究搅拌时间、表面活性剂和不同温度的影响。XRD结果证实，所有样品中均存在羟基磷灰石相。\({\text{PO}}_{4}^{{3 - }}\)的磷酸键基团在 1470 和 669 cm ^–1FTIR 结果证实。FESEM 结果表明，加入 CTAB 作为表面活性剂，在 850°C 搅拌 36 h 的条件下，获得的羟基磷灰石纳米颗粒的范围为 29-46 nm，无团聚且分散性良好。