protraction

英

美

网络  前伸; 延长; 前突; 前凸; 前旋

医学

英英释义

noun

• the act of prolonging something
  1. there was an indefinite prolongation of the peace talks
  Synonym:prolongationperpetuationlengthening
• the consequence of being lengthened in duration
  Synonym:lengthinessprolongationcontinuation

双语例句

• In the third part, we introduced the formation process of particle system, the Physically Based Modeling of particle system, the particle mechanics and the protraction of particle image.
  第三部分详细介绍了粒子系统的构造过程，粒子系统的物理模型，以及粒子运动力学和粒子图像绘制；
• Objective: To investigate the effectiveness of the mandibular Protraction appliance in the treatment of class ⅱ malocclusion.
  目的：了解下颌前伸矫治器（MandibularProtractionAppliance，MPA）对AngleⅡ类错牙合的治疗效果。
• Conclusion vertical control was good in jaw bone and was not effective in dentition when applying maxillary protraction combined with rapid expansion.
  结论联合上颌前方牵引及快速扩大方法对颌骨垂直向控制较好，但对牙齿垂直向控制较差。
• Comparison with the Effect of the Skeletal-dental and Soft Tissue Profile Changes of Maxillary Protraction with Labiolingual Appliances or Rapid Maxillary Expansion Appliances
  唇舌弓式及快速扩弓式上颌前方牵引口内装置对牙颌面及软组织侧貌影响的比较
• To evaluate the treatment effect of maxillary protraction on skeletal class ⅲ high angle cases in mixed dentition.
  【目的】探讨上颌后牙牙合垫联合前方牵引治疗替牙期骨性Ⅲ类错牙合高角病例的效果及矫治机理。
• Further protraction of the discussion will not achieve anything.
  继续讨论下去并不能解决任何问题。
• Conclusion It is obvious that age affects the results of RME and maxillary protraction therapy.
  结论年龄对于前方牵引联合快速扩弓矫治效果有较为明显的影响，矫治后上颌骨以及下颌骨的位置均与年龄有关。
• Biomechanical study on 3-dimensional finite element model of maxillary protraction and the palate expansion
  上颌前牵引联合腭部扩弓的三维有限元生物力学研究
• Sagittal airway dimensions following maxillary protraction in 30 cases
  前方牵引器治疗对上气道影响30例观察
• Objective To evaluate the treatment effect and stability of maxillary protraction and rapid palatal expansion in the permanent dentition.
  目的研究联合应用上颌前方牵引与快速扩弓对恒牙早期Ⅲ类骨性错牙合的矫治效果及稳定性。