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The incidence and severity of enamel decalcification in orthodontic treatment either in three groups or in the number of the patient's teeth of three groups were evaluated before and after treatment.

目的：了解用固定矫器治疗后的牙釉质脱矿的发生率及严重程度，并评价用75%NaF处理牙面和使用含氟牙膏后的结果。

To explore the effect of high fluoride and low protein on tooth development and clarify the mechanism of excessive tooth wear, and decalcification of incisors were researched by SEM.

为了探索高氟低蛋白对牙齿发育的影响，阐明牙齿过度磨损的机理，应用扫描电镜对第一、二切齿脱钙前的矿化及脱钙后的基质结构作了观察。

Objective To evaluate the most effective method of fluoride application to prevent decalcification of enamel before,during and after etching in orthodontic treatment.

目的探讨氟化物在正畸治疗中预防牙釉质脱矿的最佳使用方法。方法制备正畸拔除的前磨牙96颗，随机分成4组，分别为对照组及酸蚀前、中、后用氟组，粘结托槽后，将每个样本分别放入装有2ml酸性人工唾液的试管。

Objective To find a simple and effective way to prevent enamel decalcification by guiding patients wearing fixed appliance to use fluoride mouth rinse.

目的 通过指导接受固定矫治器治疗的患者使用含氟漱口液，以期找到一种简便有效的方法来防治牙釉质脱矿，从而应用氟化物防治固定正畸治疗中的牙釉质脱矿。

Objective: To find a simple and effective way to prevent enamel decalcification by guiding patients treated with fixed appliance to fluor protector NaF and brush teeth with fluoride toothpaste.

目的：了解用固定矫器治疗后的牙釉质脱矿的发生率及严重程度，并评价用75%NaF处理牙面和使用含氟牙膏后的结果。

Fluoride mouth rinse can effectively prevent and treat enamel decalcification in fixed-orthodontic treatment.

在固定正畸治疗中，含氟漱口液能有效防治牙釉质脱矿。

Decay constant k of Surface Dynamics of the modified surface can be calculated using the measurement results of the contact angle and the angle - dependent XPS, being a probe, k values can be used to characterize the surfa...

通过PET表面的接触角及F/C比的测定，计算出表面动力学衰减常数k，三种测试方法得到的k值都可以用来表征碳氟等离子体处理PET的表面动力学行为，其中混合气体的k值最小。

At present, toothpaste with fluoride is used to prevent the decayed tooth.

目前人们广泛使用含氟牙膏来预防龋齿。

This new system with decoloration and protection was a new model for dental cosmetic.

集脱色、釉面护理和美容修饰为一体的新氟牙脱色体系，为牙齿美容增加了新的治疗途径。

In this peper it is revealde that the treeing characteristics can be improved re-markably by degasification and then by SF_6-impregnation The experimental results show that the caus-es for initiation and propagation of electriecal tree are not only the effect of the energetic charge carri-ers but also the effect of oxygen in low density polyethylene.

作者采用了真空脱气后充六氟化硫(SF_6)气体的技术处理材料试样，能有效改进低密度聚乙烯的电树枝特性，把树枝起始电压和树枝起始时间提高到一个新的水平。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。