protraction
英
美
网络 前伸; 延长; 前突; 前凸; 前旋
英英释义
noun
- the act of prolonging something
- there was an indefinite prolongation of the peace talks
- the consequence of being lengthened in duration
双语例句
- Further protraction of the discussion will not achieve anything.
继续讨论下去并不能解决任何问题。 - To investigate the therapeutic effects of maxillary expansion and protraction in the primary dentition.
探讨在乳牙期利用固定扩弓矫治器前牵引的临床效果。 - Based on the practice, discussion is made on the protraction calculation for the prestressed reinforcement tensile, and analyzed several calculations including the regulation type.
结合工程实际，对预应力张拉控制中预应力筋的伸长量测算进行了探讨，提出了包括规范推荐法在内的多种测算方法，对各种方法的原理及选用作出了较全面的分析。 - Establishment of an experimental animal model of maxillary protraction and cephalometric analysis
上颌前牵引动物模型建立与头影测量分析 - Biomechanical study on 3-dimensional finite element model of simulated maxillary protraction after maxillary fissure repair
模拟修复上颌骨裂隙后前牵引受力的三维有限元生物力学研究 - Objective To study facial soft tissue changes after maxillary protraction treatment in Class III malocclusion with maxillary deficiencies.
目的：评价上颌前牵引早期矫正上颌发育不足产生的骨性Ⅲ类错（牙合）后的侧貌美学改变。 - 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。 - 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 - Based on the analysis of distortion and protraction of warp and form of shedding, the problem that dobby can not fully develop its capacity is located.
通过对开口时经纱变形伸长特性和开口形式的分析，指出了多臂机不能充分发挥效能的问题所在，并给出了解决办法。 - 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。