...键词] Quad Helix矫治器；牙弓狭窄；扩弓 [gap=909]Key words] Quad Helix appliance; Narrow dental arch; Expand dental arch ...
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expand dental arch
扩大牙弓
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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。
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