Methods The smears of oral exfoliative cells were made from buccal mucosa, the dorsum and ventrum of the tongue from 90 normal individuals.

方法 对90例正常口腔粘膜颊部、舌背、舌腹 个部位进行了脱落细胞微核计数的分析 ，并判定微核计数的影响因素。

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Conclusions Of the patients with mandibular prognathism, 1. the hyoid bone shifted downward, the dorsum lingua raised and the base of the tongue moved posteriorly;

结论下颌前突组，（1）舌骨向下移位，舌背上抬，舌根向后移动。

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Conclusions Of the patients with mandibular prognathism, 1. the hyoid bone shifted downward, the dorsum lingua raised and the base of the tongue moved posteriorly;

结论下颌前突组，（1）舌骨向下移位，舌背上抬，舌根向后移动。

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