Objective:To study the relation between recurrent aphthous ulcer (RAU) and serum copper.

目的：探讨血清铜与复发性口腔溃疡的关系。

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Objective: The Injection method of rabbits oral mucosa protein was used to establish animal models of recurrent aphthous ulcer (RAU) in this experiment.

目的：利用试验家兔口腔黏膜蛋白注射方法，建立复发性口腔溃疡动物模型，为研究人类RAU的发病机制及治疗提供理论基础。

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Objective to observe the therapeutic effect of chitosan oral ulcer spray in treatment of recurrent aphthous ulcer (RAU).

目的观察几丁聚糖溃疡喷雾剂治疗复发性口腔溃疡的临床疗效。

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