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dentin
相关语句
  牙本质
    Measurement of Poisson's Ratio of Human Dentin
    人牙本质泊松比的测定
短句来源
    Scanning Electron Microscopic Observation on Changes of the Dentin Surface Caused by CO_2 Laser Irradiation
    CO_2激光照射后牙本质变化的扫描电镜观察
短句来源
    CBFA1 enhances transcriptional activation of dentin sialophosphoprotein by Smad3 in MDPC-23 cells
    MDPC-23细胞内核心结合因子A1增强Smad3调控牙本质涎磷蛋白基因的表达
短句来源
    Construction of mouse dentin sialophosphoprotein promoter reporter gene plasmids and analysis of promoter activity of plasmids
    小鼠牙本质涎磷蛋白启动子报告基因载体的构建和启动子活性分析
短句来源
    Transient expression of human dentin sialoprotein gene in COS-7 cells
    人牙本质涎蛋白在COS-7细胞中的表达
短句来源
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  “dentin”译为未确定词的双语例句
    Experimental Study of Using Xenogeneic Dentin as Ossicular Prosthesis
    异种牙听骨赝复物的实验研究
短句来源
    INDUCTION OF TRANSFORMING GROWTH FACTOR-β1 AND DENTIN NON-COLLAGEN PROTEINS ON TISSUE ENGINEERING PULP
    TGF-β1、dNCPs及TGF-β1/dNCPs复合物对组织工程牙髓形成促进作用的研究
短句来源
    Effect of Inorganic Filler Contents on the Adhesive Resin on Adhesion to Dentin
    无机填料对粘接性树脂粘接性能的影响
短句来源
    Nucleotide polymorphisms analysis of dentin sialoprotein
    DSP基因编码区序列的多态性研究
短句来源
    Dentin sialoprotein and dentin phosphoprotein (DPP) are cleavage products expressed from a single transcript encoded by DSPP.
    其中DPP约占非胶原蛋白质的50%,它是一个高度磷酸化的蛋白质,被认为在羟基磷灰石晶体的形成中有重要作用。
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  dentin
Incisor Dentin of Hibernating Rodents as an Indicator of Some Climatic Factors
      
Architectonics and optical properties of dentin and dental enamel
      
The optical polarization method is used to study the distribution of tubules in human dentin.
      
They exhibit specific optical effects resembling conoscopic patterns, revealing the highly hierarchical structure of the crown dentin.
      
Comparative ablation rate from a Er: YAG laser on enamel and dentin of primary and permanent teeth
      
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The ultrastructure and the amino-acid composition of the enamel of the molarteeth have been studied in fossil and/or living Ailuropoda.The methods used includedscanning electron microscopy and automatic amino-acid analyser.The results obtainedare as follows:1.The Hunter-Schreger bands have a thickness in Ailurapoda molars of about8—15 prisms.In cross-cut views,although the enamel prisms show some irregularityin shape,they reveal,in general,a“hexagonal-”or“quadrangular-shaped”.It mayrepresent a basic pattern...

The ultrastructure and the amino-acid composition of the enamel of the molarteeth have been studied in fossil and/or living Ailuropoda.The methods used includedscanning electron microscopy and automatic amino-acid analyser.The results obtainedare as follows:1.The Hunter-Schreger bands have a thickness in Ailurapoda molars of about8—15 prisms.In cross-cut views,although the enamel prisms show some irregularityin shape,they reveal,in general,a“hexagonal-”or“quadrangular-shaped”.It mayrepresent a basic pattern of the enamel structure of Ailuropoda.Besides,in the zoneclosest to the enamel-dentin junction,prisms have decreased in number;and prismsare occasionally entirely missing,resulting in rodless or prismless enamel.2.The amino-acid compositions of the enamel matrix of the Pleistocene Ailuro-poda molar are characterized by a remarkable high content of glycine,alanine,glutamicacid,aspartic acid and leucine.However,it is of interest to note that there is a smallproportion of hydroxyproline in enamel.Since hydroxyproline has been detected inenamel very carefully prepared in the present analysis so that contamination withdentine was almost certainly avoided,it seems reasonably certain that the enamel ma-trix contains a small proportion of this amino-acid.

大熊猫臼齿釉质的超微结构特征主要是施氏明暗带的宽度一般由8—15条釉柱组成;釉柱的横切面一般呈六角形或四角形,由里向外,釉柱的直径逐渐增大。在靠近釉牙本质界处,釉柱数量逐渐减少,有时甚至完全缺失,形成无釉柱结构的釉质。大熊猫臼齿釉质的氨基酸组成主要以甘氨酸,丙氨酸,谷氨酸,天冬氨酸和亮氨酸的含量为最高,而蛋氨酸,胱氨酸和酪氨酸的含量为最低。另外,还含有少量的羟脯氨酸。这种组成模式一般与人类和其它哺乳动物牙齿釉质的氨基酸组成相类似。

Composite resins have been widely used to restore tooth decay. Because of poor adhesion to the tooth, composite resins must resort to dental adhesives to produce strong bond to the tooth. The bond strongth between a composite resin and tooth mediated by an adhesive depends on two interface strengths and three cohesion strengths. It has been proved that the key to obtaining good bond of composite resins to the tooth is strong interface strength between an adhesive and the tooth, and high cohesion stren gth of...

Composite resins have been widely used to restore tooth decay. Because of poor adhesion to the tooth, composite resins must resort to dental adhesives to produce strong bond to the tooth. The bond strongth between a composite resin and tooth mediated by an adhesive depends on two interface strengths and three cohesion strengths. It has been proved that the key to obtaining good bond of composite resins to the tooth is strong interface strength between an adhesive and the tooth, and high cohesion stren gth of an adhesive.The purpose of this study was to investigate the factors affecting cohesion strength of the dental adhesive by means of combining a dentin bonding agent with four kinds of enamel bonding agents to bond a composite resin onto the surface of dentin pretreated by two kinds of cleansers.The cleansers used were 10-3 aqueous solution containing 10% citric acid and 3% ferric chloride, and 0.5MEDTA. GM containing the mixture of glutaraldehyde and hydroxyalkyl methacrylate was used as dentin bonding agent. The enamel bonding agents included. A-Clearfil Bond, containing a phosphate monomer and a sulfinate; B-PDE, containing a phosphate monomer and a sulfinate; C-Enamel Bond, containing Bis-GMA and D-Enamel New Bond, containing Bis-GMA and propanal. The chemically curable EB-Ⅱ was adopted as composite resin, and the tensile bond strength. was tested as described previously. The results showed:1. For GM/Enamel Bond combination system the bond strength obtained by pretreatment with 10-3 was lower than that with EDTA. The observations by ESCA indicated that there was 23% iron element added on the surface of dentin pretreated by 10-3. It was considered that the iron absorbed on dentin surface existed in the form of Fe~(3+), which inhibited the polymerization of monomers in the adhesive to reduce cohesion strength of adhesive polymers.2. The bond strengths obtained by using bonding agents with reducers were higher than those without reducers. It indicated that oxygen inhibited the polymerization of adhesive monomers. If bonding agents contained reducers that could react with oxygen easily, inhibiting effect of oxygen on polymerization of adhesives could be reduced.3. For GM/PDE combination system the bond strength obtained by pretreatment with 10-3 was higher than that with EDTA. The enhancement resulted from the increased degree of surface decalcification and degree of open dentinal tubules. The dentinal tubules in pretreatment with 10-3 were opened more widely so that adhesives could easily spread on the surface and penetrate into dentinal tubules to initiate polymerization of monomers in GM.

本文采用柠檬酸—FeCl_3混合溶液、EDTA溶液分别作为牙面处理剂,联用一种牙本质粘接剂和四种牙釉质粘接剂,将复合树脂粘接到牙本质上,通过粘接强度的测试,考察影响高分子粘接剂内聚强度的因素。研究结果制明: 1.对于牙本质粘接剂与不含填料的牙釉质粘接剂联用体系,用柠檬酸—FeCl_3混合液处理牙面后的粘接强度比用EDTA处理的低。这可能是用前者处理时铁离子以Fe~3+存在于牙面,它对粘接剂中的单体有阻聚作用而影响粘接剂的内聚强度。 2.氧气对粘接剂单体有阻聚作用。若粘接剂中含有更容易与氧气反应的还原性物质,则可降低氧气对粘接剂中单体的阻聚作用而提高粘接剂的内聚强度。 3.对于牙本质粘接剂与含填料的牙釉质粘接剂联用体系,用柠檬酸—FeCl_3混合液处理牙面后的粘接强度比用EDTA处理的高。这种差异取决于表面处理时牙面的脱钙程度和牙本质小管的开口大小。前者使牙面脱钙和牙本质小管的开口程度较大,这有利于含填料的粘接剂树脂在牙面的充分浸润和渗透。由于此联用体系含有增强的填料,其内聚强度受Fe~(3+)阻聚作用的影响较小。

Xenogeneic (human) dentin ossicular prostheses previously preserved in 70% alcohol were implanted into the middle ear of 12 cats and concomitantly into the subcutaneous tissue of the neck.The experimental animals were killed 1 month,3 months,and 6 months after operation respectively.Implants were examined by light microscopy and scanning electron microscopy.The results indicated:dentin prosthesis has a good histocompatibility and satisfies all the criteria of an ideal material for ossicular chain...

Xenogeneic (human) dentin ossicular prostheses previously preserved in 70% alcohol were implanted into the middle ear of 12 cats and concomitantly into the subcutaneous tissue of the neck.The experimental animals were killed 1 month,3 months,and 6 months after operation respectively.Implants were examined by light microscopy and scanning electron microscopy.The results indicated:dentin prosthesis has a good histocompatibility and satisfies all the criteria of an ideal material for ossicular chain reconstruction.

将70%酒精保存的异种(人)牙听骨赝复物植入12只猫的中耳腔及皮下组织中,术后1月、3月、6月分别处死动物。植入物进行光镜和扫描电镜检查。结果表明:该赝复物有较好的组织相容性,符合理想听骨链重建材料的标准

 
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