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首页> 外文期刊>Acta biomaterialia >Effects of incorporation of hydroxyapatite and fluoroapatite nanobioceramics into conventional glass ionomer cements (GIC).
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Effects of incorporation of hydroxyapatite and fluoroapatite nanobioceramics into conventional glass ionomer cements (GIC).

机译：羟基磷灰石和氟磷灰石纳米生物陶瓷掺入常规玻璃离聚物水泥（GIC）中的影响。

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摘要

Hydroxyapatite (HA) has excellent biological behavior, and its composition and crystal structure are similar to the apatite in the human dental structure and skeletal system; a number of researchers have attempted to evaluate the effect of the addition of HA powders to restorative dental materials. In this study, nanohydroxy and fluoroapatite were synthesized using an ethanol based sol-gel technique. The synthesized nanoceramic particles were incorporated into commercial glass ionomer powder (Fuji II GC) and were characterized using Fourier transform infrared and Raman spectroscopy, X-ray diffraction and scanning electron microscopy. Compressive, diametral tensile and biaxial flexural strengths of the modified glass ionomer cements were evaluated. The effect of nanohydroxyapatite and fluoroapatite on the bond strength of glass ionomer cement to dentin was also investigated. Results showed that after 1 and 7 days of setting, the nanohydroxyapatite/fluoroapatite added cements exhibited higher compressivestrength (177-179MPa), higher diametral tensile strength (19-20MPa) and higher biaxial flexural strength (26-28MPa) as compared with the control group (160MPa in CS, 14MPa in DTS and 18MPa in biaxial flexural strength). The experimental cements also exhibited higher bond strength to dentin after 7 and 30 days of storage in distilled water. It was concluded that glass ionomer cements containing nanobioceramics are promising restorative dental materials with both improved mechanical properties and improved bond strength to dentin.
机译：羟基磷灰石（HA）具有出色的生物学行为，其组成和晶体结构与人牙齿结构和骨骼系统中的磷灰石相似;许多研究人员试图评估将HA粉添加到修复性牙科材料中的效果。在这项研究中，使用基于乙醇的溶胶-凝胶技术合成了纳米羟基和氟磷灰石。将合成的纳米陶瓷颗粒掺入市售玻璃离聚物粉末（Fuji II GC）中，并使用傅里叶变换红外和拉曼光谱，X射线衍射和扫描电子显微镜进行表征。评价了改性玻璃离聚物水泥的压缩，径向拉伸和双轴弯曲强度。还研究了纳米羟基磷灰石和氟磷灰石对玻璃离聚物水泥与牙本质粘结强度的影响。结果表明，在凝固1天和7天后，与对照组相比，添加纳米羟基磷灰石/氟磷灰石的水泥具有更高的抗压强度（177-179MPa），径向拉伸强度（19-20MPa）和更高的双轴弯曲强度（26-28MPa）。组（CS为160MPa，DTS为14MPa，双轴弯曲强度为18MPa）。在蒸馏水中储存7天和30天后，实验性水泥还显示出更高的与牙本质的粘合强度。结论是，包含纳米生物陶瓷的玻璃离聚物胶粘剂是具有改善的机械性能和与牙本质的粘合强度的有前途的修复性牙科材料。

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