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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。
youdao
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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。
youdao