中文摘要：

目的：观察实验性牙移动时，NGF受体-TrkA mRNA在三叉神经节内的改变，方法：采用RT—PCR方法研究实验性牙移动后，三叉神经节内TrkA mRNA表达的改变。结果：实验性牙移动后6h，实验侧TrkA mRNA的表达开始增加；24h．3d，1周实验组三叉神经节内TrkA mRNA的表达强于对照组；2周组，实验侧TrkA mRNA的表达恢复至正常水平。结论：实验性牙移动时，三叉神经节内TrkA的表达升高。

英文摘要：

Objective： To observe the changes of TrkA mRNA level in the trigeminal ganglion during the experimental tooth movement. Methods： The expressions of TrkA mRNA in trigeminal ganglion were tested by RT - PCR technology. Results： Comparing to the control group, the gene expression of the high - affinity NGF receptor, TrkA, was upregulated during the experimental tooth movement to a different extent and in a time - dependent manner. Expression of TrkA mRNA increased after 6 hours experimental tooth movement, then reached the highest at 24 hours and returned to control level after 2 weekes. Conclusion： The expression of TrkA increases in trgeminal ganglion after the experimental tooth movement.