下颌骨骨压缩前后颏动脉血流量变化的研究

Changes of blood flow volume in dog's mental artery after mandible osteocompression

目的观察下颌骨骨压缩前后颏动脉血流量的变化。方法北京本地犬16只。将钛合金骨压缩器植入实验犬右侧下颌骨体部,以每3 d 1.0 mm的频率进行骨压缩实验。左侧为对照。在骨压缩完成后固定保持的第1、15、45和90天分别使用多普勒超声仪测量左右侧颏动脉的平均血流量。结果 1)在骨压缩实验侧,压缩后第15天颏动脉血流量降至最低,以后逐渐升高,但是各个时间点的测量值没有显著性差异;在对照侧,各个时间点的测量值基本一致。2)骨压缩实验侧和对照侧的血流量在骨压缩后第1天有显著性差异。3)实验侧与对照侧血流量的差值在骨压缩实验后明显下降,与实验前有显著性差异;到骨压缩后90 d恢复到实验前水平。结论骨压缩可以对颏动脉血流量产生影响,但是这种影响是暂时的、可逆的,随着时间的推移,颏动脉血流量可以恢复接近正常。

Objective To observe the changes of blood flow volume in mental artery of dog before and after osteocompression.Methods 16 adult dogs were selected and the osteocompressors were fixed on the right buccal side of the mandible.The osteocompressor was used to compress the mandible 1.0 mm per 3 days for totally 15 days.On the 1st,15th,45th and 90th day after osteocompression,the 4 MHz prober of color Doppler flow imaging machine was put on the surface of the mucosa below which there was the mental artery.The color Doppler flow imaging was used to measure the blood flow volume in the mental artery of both experimental and control sides.Results 1）The blood flow value in the mental artery was the lowest on the 15th day after osteocompression,however there was not significantly different before and after osteocompression.2）Compared with the control,the blood flow value of the mental artery on the 1st day after experiment was significantly decreased.3）Compared with the data before experiment,the deduction of the blood flow values between experimental side and control on the 1st,15th and 45th day after osteocompression had significant differences.On the 90th day,the deduction of the blood flow value was similar to normal.Conclusion The osteocompression influences blood flow volume in mental artery temporarily,however,the influence is reversible and can be recovered by times after osteocompression.