Objective to evaluate the effect to caries of the fixed appliance by the investigation of plaque index on the crown surface of teeth at the different stages.
目的通过调查固定矫治器治疗中牙冠表面托槽周围的牙菌斑指数评价固定矫治器对龋病的影响。
Conclusions Applying 30% supersaturated potassium oxalate to block dentinal tubule could prevent or reduce crown surface discoloration effectively after front teeth canal therapy.
结论使用30%草酸钾封闭牙本质小管可有效防止及减少前牙根管治疗后牙冠变色。
Conclusion By adopting the root canal therapy together with the technologies of inner bleaching and seal dentinal tubule we can prevent and cure crown surface discoloration effectively.
结论在根管治疗的同时结合内漂白技术和牙本质小管封闭技术能有效地防治牙冠表面变色。
The gross flowers and height, diameter, crown width, crown height, crown surface of Chinese fir clones in Guangxi area were investigated by genetic correlation analysis and path-coefficient analysis.
对广西杉木无性系的总花量与树高、胸径、冠幅、冠高、树冠表面积进行了遗传相关及通径分析分析表明：总花量与生长性状之间的遗传相关系数均为负值；
OBJECTIVE: To investigate the influence of surface potentials of tooth hard tissue on its migration towards crown and supraeruption.
目的：研究牙硬组织表面电位与牙冠向萌出或过萌的关系。
The piston head or "crown" is the top surface against which the explosive force is exerted.
活塞头部或“冠部”是整个活塞的最上端，处在燃烧室里要承受爆炸燃烧产生的力。
The surface and ambient temperatures of the crown of crusher in crushing sintering ore were measured in situ.
在现场测量了破碎机破碎烧结矿时其齿冠的表面温度和环境温度。
Tu crown coating technology for customers to improve productivity, reduce product cost, provide a complete surface treatment solutions to help customers gain an edge in the competition.
涂冠镀膜科技为客户提高生产效率，降低产品使用成本，提供完整的表面处理方案，协助客户在竞争中获得优势。
Tu crown coating technology in the Suzhou Industrial Park to establish a complete coating technology center, a client can get better in this new surface treatment technology.
涂冠镀膜科技在苏州工业园区建立完备的涂层工艺中心，客户在此可以获得更好的表面处理新技术。
Nowadays, the requirements for road surface smoothness, amount of crown and compactness are becoming more and more strict, which the automatic leveling capability of early spreaders can no more meet.
当今对公路路面的平整度、路拱坡度和密实度等的要求越来越高，而早期的摊铺机自动找平机现已不能满足要求。
The gold strip is probably the ornament in a crown. There are carvings like fish and other animals on the surface, and they are clear even to details.
这种金冠带可能是王冠上的装饰，它的表面刻画有鱼、鸟等动物，连细微之处都表现得非常清晰。
The ground surface settlement, crown settlement, convergence of surrounding rock, etc, are monitored and measured during the Fantun tunnel construction of Jianxing Highway.
在建兴高速樊屯隧道施工过程中，对地表沉降、拱顶下沉、围岩收敛等进行了监控测量。
These data are fit with method of spline and resampled to divide crown into many small slices, whose volume and surface add up to the result.
然后用三次样条法拟合剖面边缘曲线并插值采样，把立体树冠分解成许多微小的切片分别求体积和表面积，依次累加就得到所需结果。
The forest crown interception precipitation, the penetration speed of soil, and the surface runoff of Larix Kaempferi forests in Funiu Mountain in Western Henan Province were measured in this paper.
测定了豫西伏牛山区日本落叶松林的林冠截流降雨、土壤渗透速度和地表径流。
The forest crown interception precipitation, the penetration speed of soil, and the surface runoff of Larix Kaempferi forests in Funiu Mountain in Western Henan Province were measured in this paper.
测定了豫西伏牛山区日本落叶松林的林冠截流降雨、土壤渗透速度和地表径流。
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