畸

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。

Thus the prevention of enamel demineralization during orthodontic treatment has been a chief problem for orthodontists to consider.

因此，预防正畸治疗中的牙釉质脱矿的发生就成为正畸医师首先要考虑的问题。

The fluoride-vanish on the orthodontic treatment of enamel demineralization has significant inhibitory effect.......

氟保护漆对正畸治疗中的釉质脱矿有明显抑制作用。釉质脱矿；氟保护漆；正畸

Obviously, divorcement rate is very high in recent years, and a lot of people don't want to marry.

畸于人而侔于天，以人为畸与天为偶，不与人打交道，和天是好朋友。

Thus this study focus on the the effects of mechanical forces and 1,25- 2D3 on the expression of ODF and OCIF by periodontal tissue in vivo and periodontal ligament cell and osteoclast in vitro,thus clarify the molecular biology mechenism of tissue remodeling,and explore a new way in orthodontic clinic to accelerate the dental movement speed by adding some ectogenesis stimulating factors.

研究内容如下：一牵张力作用下牙周组织ODF及OCIF表达变化的研究目的：运用原位杂交的方法，观察ODF及OCIF在正畸大鼠牙周组织改建过程中张力侧的表达变化，探讨ODF及OCIF与正畸牙周组织改建的关系。

We have also compared the 3D images before and after the treatment to investigate the change of facial soft tissue.

口腔正畸领域中，形态学的研究具有十分重要的意义，许多年以来，正畸治疗中的诊断分析、治疗计划制定和效果评价都是借助面

The four-handed technique makes for improvement of clinical ability of postgraduates, which is of great significance in teaching.

四手操作技术有利于正畸研究生临床工作能力的提高，对正畸临床教学有重要意义。

Objective: The aim of this study is to investigate whether orthodontic extrusion movements have negative effects on the gingival tissues, and to detect the relationship between orthodontic tooth extrusion and the width of the keratinized gingiva.

目的：本研究的目的是调查是否正畸挤压运动产生不利影响的牙龈组织，并检测之间的关系正畸牙齿挤压和宽度的角化牙龈。

From 1961 to 1978, 40 cases of intrathoracic terato-dermoids were operated upon in Capital Hospital, among which 10 cases of giant tumors were analyzed.

首都医院1961～1978年共手术切除40例胸内畸胎瘤及畸胎囊肿，本文分析其中巨大的10例，直径均大于17厘米，最大的1例囊内液体达5000毫升。

In lingual orthodontics, the applying of intrusion force was less useful than the well control of the M/F ratio to control the torque of upper incisors. If the crown of the incisor had been inclined lingually, it would be very difficult to recover the torque.

3舌侧正畸中，首要的是控制好M/F值，否则即使加大垂直压低力也难以抵抗冠唇向转矩的不足；而且一旦产生舌倾趋势，将比唇侧正畸更难以恢复。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。