上下颌牙用丝线结扎法形成局部刺激因素。
The local stimulation was caused by tiring silk thread to teeth.
方法：结扎丝线法建立大鼠急性牙髓炎症模型和免疫组织化学技术观察牙髓CGRP - IR神经纤维的变化。
Methods: Rat acute pulpitis model was established by silk thread ligation and the change of CGRP IR nerve fibers was observed with immunohistochemical method.
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