Characteristics of hydroxyapatite film formed on human enamel with the powder jet deposition technique
Characteristics of hydroxyapatite film formed on human enamel with the powder jet deposition technique
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DOI：
10.1002/jbm.b.31781
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发表时间：
2011-08-01
影响因子：
3.4
通讯作者：
Kuriyagawa, Tsunemoto
中科院分区：
文献类型：
--
作者：
Akatsuka, Ryo;Sasaki, Keiichi;Kuriyagawa, Tsunemoto
本研究旨在通过操纵人牙釉质上方的喷嘴，用粉末喷射沉积法制备羟基磷灰石(HAP)薄膜，并检测其微观结构和力学性能，以及HAP薄膜与釉质基质界面的结合强度。使用在1200℃下焙烧的平均尺寸为4.7微米的HAP颗粒。HAP颗粒与载气(N-2)混合形成气雾流，并在常温常压下从喷嘴加速并喷射到釉质基材上。用扫描电子显微镜(SEM)观察了HAP薄膜的表面和横截面图像以及HAP薄膜的三维形貌，以评价薄膜的微观结构。测试了羟基磷灰石薄膜的显微维氏硬度和与釉质基板的结合强度，以评价其力学性能。HAP薄膜的沉积面积大于3×4 mm。平均厚度约30微米，最大厚度约40微米。HAP膜的硬度与牙釉质的硬度无显著差异(p>；0.05)。HAP膜的粘接强度与复合树脂与牙釉质的粘接强度相同。与以往的报道相比，成功地在釉质基质上形成了更宽更厚的HAP膜。羟基磷灰石薄膜与牙釉质具有相同的硬度，与牙釉质具有相同的粘结强度，有望成为牙科修复材料的候选材料。(C)2011年威利期刊公司J生物材料资源B部分：APPL生物材料98B：210-216,2011年。
This study aimed to create hydroxyapatite (HAp) film by powder jet deposition with manipulating the blasting nozzle above human enamel and to examine the microstructural and mechanical properties of the HAp film and the bonding strength at the interface between the HAp film and the enamel substrate. HAp particles calcinated at 1200 degrees C with an average size of 4.7 mu m were used. The HAp particles were mixed with carrier gas (N-2) to form an aerosol flow and was accelerated and blasted from the nozzle onto the enamel substrate at room temperature and atmospheric pressure. To evaluate the microstructure, scanning electron microscope (SEM) images of the surface and cross section of the HAp films and a three-dimensional profile of the HAp films were observed. To evaluate the mechanical properties, the micro-Vickers hardness and the bonding strength of the HAp films to the enamel substrate were measured. The deposition area of the HAp film was over 3 x 4 mm. The average and maximum thickness were about 30 and 40 mu m, respectively. No significant difference was observed between the hardness of the HAp film and the enamel (p > 0.05). The bonding strength of the HAp film was the same as the bonding strength between composite resin and enamel. Compared with previous reports, wider and thicker HAp film was created on the enamel substrate successfully. The HAp film, which has same hardness with enamel and same bonding strength to the enamel with composite resin, would be a candidate as dental restorative materials. (C) 2011 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 98B: 210-216, 2011.