Establishing the orthodontic tooth movement model in SD rat oral. The experimental side of the left maxillary arch, the right to control side.
在SD大鼠口腔内建立正畸牙齿移动模型，以左侧上颌牙弓为实验侧，右侧为对照侧。
Objective: To investigate the effects of tooth extraction on dental arch width and alveolar bone width.
目的：研究拔牙矫治对牙弓宽度和基骨宽度的影响。
Objective The objective of the study is to obtain the data of the arch width of the children in Zhenghe, Fujian, and to know the development regularity and characteristics of the growth of the tooth.
目的 了解福建省北部地区政和县儿童牙弓宽度，为研究当地儿童牙弓宽度生长发育的规律和特点提供依据。
PURPOSE: to study the effect of maxillary and mandibular lip bumper on tooth and dental arch in late mixed dentition.
目的：研究上下颌唇挡同时应用对替牙晚期儿童牙牙合的影响。
PURPOSE: to study the effect of maxillary and mandibular lip bumper on tooth and dental arch in late mixed dentition.
目的：研究上下颌唇挡同时应用对替牙晚期儿童牙牙合的影响。
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