查询词典 fluorapatite

The mechanism of bioactivity of the glass ceramics containing fluorapatite and fluorophiogopite microcrystals was investigated by using the in vitro and in vivo methods.

1引言生物玻璃、微晶玻璃的生物活性是关系到其植入人体后能否与活骨组织_产生牢固化学结合的关键因素'""。

After the fluoride into the tooth germ, it is in the developmental stage with the enamel crystals react fluorapatite began to replace the hydroxyapatite.

进入后牙胚氟，它在牙釉质晶体的发展阶段，是氟磷灰石反应开始取代羟基磷灰石。

Fluorapatite is a crystal that contains fluoride, tooth enamel than in the general composition of hydroxyapatite crystals have a stronger corrosion resistance.

含氟是晶体，其中包含比一般的羟基磷灰石晶体组成的氟化物，牙齿珐琅质具有较强的耐腐蚀性。

ABSTRACT Yb-doped calcium fluorapatite single crystals were successfully grown by the Czochralski method.

摘 要 用高频感应提拉法生长了掺Yb3+氟磷酸钙晶体，获得了理想的生长工艺参数。

A new ceramic containing fluorapatite and small particles of glass is being used to replace teeth. This ceramic material has the aesthetic look of a natural tooth and causes less wear to opposing teeth than other available materials. Research is even being done on a "ceramic" based gum which is thought to retard the growth of plaque.

一种新型的含有氟磷酸钙以及玻璃小颗粒的陶瓷正用于替代牙齿，用这种陶瓷制成的牙齿，有着和天然牙齿一样的外表，并且具有比由其他用于制作假牙的材料更好的耐磨性，研究人员也正在研制一种陶瓷基牙龈，以阻碍牙菌班的生长。

The fluorapatite crystals found in d.

这两种材料整合到一种单一的玻璃瓷中达到了光学与物理性能提升的结合。

The formation processes and mechanisms of FHA phase and fluorapatite phase in Ca〓-PO 〓〓-C〓H〓OH system with different fluorine containing compounds are investigated.

论文研究了以Ca（NO〓为溶胶体系、通过在其中引入含氟化合物合成FHA相和纯FA相的反应过程和机理。

Mineralogically, the phosphorite is mainly consist of carbonate fluorapatite.

矿石的结构类型丰富多样，主要为颗粒结构磷块岩和叠层石磷块岩。

Fluoride to prevent cavities there are several ways: to hydroxyapatite into fluorapatite difficult to dissolve and reduce enamel in acid in the soluble; to a direct impact on dental plaque and reducing plaque organisms secrete acid capacity; accelerated by acidic substances are due to decalcification of the tooth enamel erosion and mineral parts of recharging it.

氟化物以防止蛀牙，有几种方法：对羟基磷灰石成难溶于和减少酸，可溶性搪瓷；在对牙菌斑产生直接影响，减少牙菌斑生物分泌酸能力；的酸性物质加速是由于脱钙的牙齿釉质侵蚀，它的充电矿产部分。

To evaluate the bioactivity of the glass-ceramics,the specimens were soaked in the simulated body fluid. The results indicate that fluorapatite shows needle-like microstructure, which is similar to that in human bone and teeth. The formation of needle-like fluorapatite is related to the heat treatment procedure, which results in needle-like fluorapatite crystals by accelerating one-dimension growth along the c-axis through the screw dislocation growth mechanism. The mechanical properties of the glass-ceramics are close to those of the human bone and teeth. The bioactivity test results show that apatite layer is precipitated on the materials surface after 3 d immersion in SBF, which indicates the glass-ceramics have a good bioactivity.

研究结果表明：氟磷灰石相呈针状，与人体骨和牙齿的磷灰石形貌相似，有利于提高材料的生物活性和生物相容性；氟磷灰石的形成是材料被迅速加热至高温进行热处理，使磷灰石以螺旋位错生长机制沿c轴晶化长大所致；经热处理获得的材料具有优良的力学性能，基本满足骨科和齿科用生物材料的性能要求；材料在体外模拟体液中浸泡3 d后，样品表面已有磷灰石层生成，表明该材料具有较高的生物活性。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐