冠

For post core crown, the core materials with high elastic modules are commendated, and if composite resin post core is adopted, it should also have higher elastic modules.

对于行根管治疗术后的无髓牙，进行核桩冠修复时，应采用高弹性模量的桩核材料；如果使用复合树脂核，也应采用高弹性模量的复合树脂。

In resent years, fiber-reinforced composite post and composite resin core is a new choice in the post crown restoration. It has high strength and good translucency, and good to protect the root as well.

近年来出现的纤维树脂桩核材料因具有强度高、弹性模量与牙体组织接近，有利于保护牙根、透光性好、不影响核磁共振成像等优点为桩冠修复提供了新的材料选择。

The model of a standard maxillary central incisor restored with cast post and porcelain crown was constructed through three dimensional finite element methods .

运用三维有限元法构建解剖标准前牙桩冠修复体模型，并模拟不同牙合接触形式进行加载以分析剩余牙本质应力。

Post crown is comfortable and aesthetic for wear, and it can offer very good retention. It is the most important reason of the failure for final restoration that the residual root fracture again.

因其固位良好，外形和牙冠色泽接近天然牙，美观舒适，制作简便，支持与受力形式合理而为广大患者所喜爱。

Can, under the guidance of the teacher, the correct file to use root canal + protaper, prepared root canal, the sharp taper gutta-percha filling + fiber post + crown restoration or filling operation, the independent number of cases completed root canal therapy and filling.

能够在老师的指导下，正确运用根管锉＋protaper，预备根管，大锥度牙胶尖充填＋纤维桩＋冠修复或充填术，独立完成若干例根管治疗及充填术。

Crown rot causes the entire plant to collapse and die in a short period of time.

冠腐病会在很短时间内使植株全株枯萎死亡。

Martin, 2000. In addition, Phytophthora spp. cause crown rot, root rot, and plant death.

此外，疫霉菌属也能导致草莓发生冠腐病、根腐病，甚至植株死亡。

Crown rot can kill trees damaged by frost or growing in saturated soil, as well as from trunks hit by frequent, superficial lawn sprinkling.

冠腐病，可以杀死树木损坏或霜冻曰趋饱和土中，以及从树干击中频繁，浅表草坪喷灌。

Phytophthora capsici is an important fungal pathogen that causes seed rot, seedling damping-off, root and crown rot, leaf spots, stem lesions, foliar blight, and fruit rot in many solanaceous crops and cucurbits (cantaloupe, cucumber, summer squash, pumpkin, watermelon). Rottingof seedlings prior to emergence (preemergence damping-off) and blighting of recently emerged seedlings (postemergence damping-off) can occur.

茄科疫病菌为一重要病原真菌，其在许多茄科作物与葫芦科作物(如哈密瓜、胡瓜、栉瓜、南瓜、西瓜)中会引起种腐病及种苗的猝倒、根腐及冠腐、叶斑、茎部病灶、叶枯和果腐病，而幼苗前猝倒病与后猝倒病亦皆会发生。

Appressoria were latent in intercellular cleft and were latent until banana fruit were harvested.The development process of conidia of Colletotrichum musae on fruit was not distinct from foliage and stalk.Two pairs of PCR primers were designed according to the two especial fragment (357bp and 206bp) of Colletotrichum musae. Banana tissue culture seedling genomic DNA, banana anthracnose pathogen genomic DNA, mango anthracnose pathogen genomic DNA, rubber anthracnose pathogen genomic DNA,watermelon anthracnose pathogen genomic DNA, banana crown rot pathogen genomic DNA, stylo anthracnose pathogen genomic DNA, watermelon Fusarium wilt pathogen genomic DNA were extracted using SDS method.

根据香蕉炭疽菌的两个特异片段(分别为357bp和206bp)，设计两对引物：采用SDS法分别提取了香蕉组培苗基因组DNA、香蕉果实炭疽菌弱致病株Z_1基因组DNA、香蕉果实炭疽菌强致病株Z_4基因组DNA、芒果炭疽菌基因组DNA、橡胶炭疽菌基因组DNA、柱花草炭疽菌基因组DNA、西瓜炭疽菌基因组DNA、香蕉冠腐病菌基因组DNA、西瓜枯萎病菌基因组DNA；以上述基因组DNA为模板对特异片段进行PCR验证，证明357bp的片段为Colletotrichum musaes所特有，可以用此片段进行香蕉果实炭疽病的分子检测试验，。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。