Objective To evaluate the use of dental operating microscope and ultrasonic instruments in treating difficult root canal.
目的评价根管显微镜和超声联合应用技术对疑难根管处理的临床应用效果。
Objective: To explore the use of dental operating microscope with ultrasonic instruments in root canal retreatment.
目的：探讨牙科手术显微镜结合超声工作器械进行根管再治疗的临床应用效果。
Two applications of laser, in the ultrasonic detection technique, laser ultrasonic technology and scanning laser acoustic microscope, are explored in detail.
对激光在超声检测技术中的两个应用方面，即激光超声技术和激光扫描声学显微镜做了详细的阐述。
Through wet etching and ultrasonic experiment, no film falling is observed with microscope.
对样品进行了湿法腐蚀和超声实验，在显微镜下观察无膜脱落现象发生。
Objective: To evaluate the effects of the microscope and ultrasonic technique for the removal of fractured root canal instruments.
目的：评价手术显微镜下结合超声装置取出根管内折断器械的效果。
Solder Robert, BGA rework station, Automatic Glue dispenser, Video Microscope, Fume absorber, Soldering station, Solder pot, Ultrasonic cleaner, Cable tester, etc.
焊接机器人、BGA返修台、自动点胶机、视频显微镜、吸烟系统、焊台、锡炉、超声波清洗器。网络测试工具等。
Methods: the total of 232 root canal in 159 teeth of 135 patients who need root canal retreatment of the permanent molar were treated by using dental operative microscope and ultrasonic technique.
方法：对135例需要恒磨牙根管再治疗患者的159颗恒磨牙(232个根管)用显微超声技术进行再治疗，按牙位及治疗原因分类，比较成功率。
The backscatter coefficient of hemorrhage lymphnode is smaller than that of normal lymphnode and changes with the frequency. The ultrasonic backscatter microscope technique is a useful device…
猪的出血性淋巴结组织的声散射系数比正常淋巴结组织的小，且随频率的变化而变化，背向散射技术是在高频段进行组织定征的有效手段。
The backscatter coefficient of hemorrhage lymphnode is smaller than that of normal lymphnode and changes with the frequency. The ultrasonic backscatter microscope technique is a useful device…
猪的出血性淋巴结组织的声散射系数比正常淋巴结组织的小，且随频率的变化而变化，背向散射技术是在高频段进行组织定征的有效手段。
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