Dental arch expansion appliance for 25 patients with mandibular arch stenosis showed that semi-fixed mandibular lingual arch expansion had good effect and could be used to expand mandibular arch.
对25例下牙弓狭窄患者的扩弓矫治表明，下颌舌侧半固定扩弓矫治器的扩弓效果良好。
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。
Objective: To evaluate the effect of segmental arch technique and implant reinforcing anchorage on depressing the elongated opposed teeth for preparing enough space for mandibular dental implant.
目的：探讨片段弓技术联合部种植支抗压低上颌磨牙，为下颌牙缺失的种植修复提供足够的合间距离。
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