Characterization of Rare-Earth Oxide Photoactivated Calcium Phosphate Minerals for Resurfacing Teeth

Characterization of Rare-Earth Oxide Photoactivated Calcium Phosphate Minerals for Resurfacing Teeth
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用于牙齿表面重修的稀土氧化物光活化磷酸钙矿物的表征

DOI:
10.1111/j.1551-2916.2012.05324.x
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发表时间:
2012
影响因子:
3.9
通讯作者:
Elmadani E
Elmadani E
中科院分区:
材料科学2区
文献类型:
--
作者:
Elmadani E

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由水合硝酸钙Ca(NO3)2·4H2O和磷酸氢铵(NH4)2HPO4组成的水溶液,在室温下以光活性氧化铒(Er2O3)和耐酸性相混合物磷酸铝(AlPO4)和氟化钙(CaF2)为原料,合成了磷酸钙(CaP)矿物。X-射线粉末衍射仪分析表明,在室温下,主要析出物相为单硝酸盐(CaHPO4)和水滑石(CaHPO4·2H2O)。显微结构分析显示,尖晶石和刷石存在血小板样特征,通过100ps脉冲宽度激光照射,测试了它们对牙本质小管的封闭作用,激光波长为1520 nm,重复频率为2.5 GHz。咬合表面牙本质小管的扫描电子显微镜分析显示,牙本质小管连续10微米厚,覆盖了几百微米厚的表面。这一结果为使用耐酸矿物的超快激光烧结牙本质小管闭塞提供了机会。
Calcium phosphate (CaP) minerals were synthesized with photo‐active erbium oxide (Er2O3), and acid‐resistant phase mixture of aluminum phosphate (AlPO4) and calcium fluoride (CaF2) at room temperature via precipitation from the aqueous solution of hydrated calcium nitrate Ca(NO3)2·4H2O and ammonium hydrogen phosphate (NH4)2HPO4. The dominant precipitated phases, characterized by X‐ray powder diffraction, confirmed the presence of monetite (CaHPO4) and brushite (CaHPO4·2H2O) at room temperature. The microstructural analysis showed the presence of platelet‐like features of monetite and brushite, which were tested for occlusion of dentinal tubules via irradiation with a 100 fs pulse duration laser, operating at 1520 nm at 2.5 GHz repetition rate. The SEM analysis of dentinal tubule over the occluded surface showed a continuum of 10 µm layer, which covered several 100s of micrometer surface. The results open the opportunity for dentinal tubule occlusion via ultrafast laser sintering using acid‐resistant minerals.
37°C 下人体牙釉质与酸溶液平衡过程中透钙磷石、三斜磷钙石和钙磷矿的形成
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