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。
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