It is useless spoiling the ship a ha'p'orth of tar.

Alkyl is an usual ortho-para directing group.

烷基通常是邻对位定位基.

Phosphoric acid produced by the wet process is in the ortho form.

用湿法生产的磷酸呈正磷酸状态.

We describe here the synthesis and characterization of high ortho-positionphenol-formaldehyde resin ether.

报道了高邻位酚醛树脂酸的合成和表征.

Drawing of the oral cavity teeth provides base for computer aided orthodontia.

口腔牙齿的描绘为口腔辅助正畸系统建立提供基础.

Methods Introduce the orthodontic Methods: Through the typical case.

方法: 结合典型病例介绍矫治方法.

Objective : To explore an effective orthodontic method for treating impacted teeth.

目的: 探讨埋伏阻生牙有效的正畸牵引治疗方法.

Aim : To prevent the fixed-orthodontic etching from acid-eroded enamel opaque spot.

目的: 预防口腔固定正畸酸蚀牙釉白斑的发生.

Panoramic X-ray before orthodontic treatment.

图3.矫正治疗前之环口放射线 X 光片.

There are many studies about the factors in term with orthodontic pain.

正畸疼痛相关因子也成为国内外学者研究的热点.

Intermaxillary tooth size discrepancy can affect the final result of orthodontic treatment and its stability.

而颚间牙齿大小的差异,可能会影响矫正治疗最后的结果和咬合的稳定性.

Results All cases had good treatment effects after orthodontic treatment.

结果9例病例治疗后均达到较理想的临床效果.

In the procedure of orthodontic treatment, most patients suffer from toothache.

正畸治疗过程中, 大多数患者会出现各种不同程度的牙疼痛.

METHODS: Eight hundred patients aged 13-23 from orthodontic clinic were chosen.

方法: 选取我科收治的正畸病人800例,年龄13～23岁.

Conclusion Corticotomy-facilitated orthodontics is an effective method to correct the collapsed arch and severe posterior lockbite.

结论牵张成骨术配合正畸力是一种解决牙弓塌陷和后牙锁牙合等正畸疑难病例的有效方法.

This article reviews the recent research developments in implant in orthodontics and prosthodontics.

本文就种植体在口腔正畸、修复中的研究近况作一些介绍.

It provides science analysis in diagnosis and research of orthodontics.

该系统为口腔正畸医学的诊断和研究提供科学的分析依据.

A practical experts system is proposed after thorough analysis and study orthodontics.

在深入分析和研究口腔正畸学的基础上,开发出一套实用的专家系统.

Now it is as just about as cosmetic, and as non-essential, as birth control or orthodontics.

现在它几乎是仅用作表面的或 非 必须的, 作为出生控制或牙齿矫正.

Construction of three-dimensional and non-liner finite element model of Ni-Ti arch wire for orthodontics.

正畸NiTi弓丝三维非线性有限元建模研究.

Orthodox economists believe that a recession is now inevitable.

正统的经济学家认为经济衰退现在是无法避免了。