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搜索结果: 1-3 共查到口腔正畸学 First premolar extraction相关记录3条 . 查询时间(0.062 秒)
Objective: To compare the angular changes in the developing mandibular third molars in both first premolar extraction and nonextraction cases and to determine whether premolar extraction results in a ...
Change in molar space is compared in 48 mandibular first premolar extraction cases and 46 non-extraction cases over a five year period. Significantly greater increase in molar space is found in extr...
The purpose of this study was to evaluate the differences in the long-term stability of orthodontically induced changes in arch form between patients who receive early orthodontic treatment (Hellm...

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