Department of Operative Dentistry, College of Dentistry, Yonsei University, Seoul, Korea.
J Endod. 2010 Mar;36(3):419-22. doi: 10.1016/j.joen.2009.12.031.
This study compared the difference in pulpal blood flow between vital and root-filled teeth by using ultrasound Doppler imaging.
To compare the difference in pulpal blood flow between vital and root-filled teeth, 11 patients (mean age, 32.06 years; 3 male, 8 female) who had undergone root canal treatment on the anterior tooth of the maxilla or mandible and had a vital contralateral tooth were examined. Pulpal blood flow measurements were performed on the vital and root canal-treated teeth by using ultrasound Doppler imaging. The parameters examined were the maximum linear velocity (Vas), average linear velocity (Vam), minimum linear velocity (Vakd), pulsation index (PI), and circulation resistance (RI), which are indicators of the pulpal blood flow. The differences between the vital and root-filled teeth were examined by using a paired t test at the 95% confidence interval.
There were significant differences in the Vas, Vam, Vakd, and RI between the vital and root-filled teeth (P<.05). With the root-filled teeth, ultrasound Doppler imaging revealed a linear and nonpulsed waveform, whereas the vital teeth showed a pulsed waveform that is characteristic of an arteriole.
Ultrasound Doppler imaging can detect pulpal blood flow in vital tooth through indicators such as Vas, Vam, Vakd, PI, and RI.
本研究通过超声多普勒成像比较活髓牙和根管治疗牙的牙髓血流差异。
为了比较活髓牙和根管治疗牙的牙髓血流差异，选择了 11 名（平均年龄 32.06 岁；男 3 名，女 8 名）上颌或下颌前牙接受根管治疗且有健康对侧同名牙的患者。通过超声多普勒成像测量活髓牙和根管治疗牙的牙髓血流。检查的参数包括最大线性速度（Vas）、平均线性速度（Vam）、最小线性速度（Vakd）、搏动指数（PI）和循环阻力（RI），这些都是牙髓血流的指标。在 95%置信区间内使用配对 t 检验检验活髓牙和根管治疗牙之间的差异。
活髓牙和根管治疗牙之间的 Vas、Vam、Vakd 和 RI 存在显著差异（P<.05）。在根管治疗牙中，超声多普勒成像显示线性而非脉冲波，而活髓牙则显示出典型的小动脉脉冲波。
超声多普勒成像可以通过 Vas、Vam、Vakd、PI 和 RI 等指标检测活髓牙的牙髓血流。
